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4th cscope sci_mixtures_and_solutions
1.
5th Grade
Science Unit: 01 Lesson: 2 Duration: 8 days Mixtures and Solutions TEKS: 5.7 The student knows that matter has physical properties. 5.7B Demonstrate that some mixtures maintain the physical properties of their ingredients 5.7C Identify changes that can occur in the physical properties of the ingredients of solutions such as dissolving sugar in water. 5.7A Classify matter based on its physical properties including magnetism, physical state, and the ability to conduct or insulate heat, electricity, and sound. 5.1 The student conducts field and laboratory investigations following home and school safety procedures and environmentally appropriate and ethical practices. 5.1A Demonstrate safe practices during field and laboratory investigations 5.2 The student uses scientific methods during field and laboratory investigations. 5.2A Plan and implement descriptive and simple experimental investigations including asking well-defined questions, formulating hypothesis, and selecting and using equipment and technology 5.2B Collect information by observing and measuring 5.2C Analyze and interpret information to construct reasonable explanations from direct and indirect evidence 5.2D Communicate valid conclusions 5.2E Construct simple graphs, tables, maps and charts using tools including computer to organize, examine and evaluate information. 5.3 The student uses critical thinking and scientific problem solving to make informed decisions. 5.3A Analyze, review, and critique scientific explanations, including hypothesis and theories, as to their strengths and weaknesses using scientific evidence and information 5.3C Represent the natural world using models and identify their limitations 5.4 The student knows how to use a variety of tools and methods to conduct science inquiry. 5.4A Collect and analyze information using tools including calculators, microscopes, cameras, sound recorders, computers, hand lenses, rulers, thermometers, compasses, balances, hotplates, meter sticks, timing devices, magnets, collecting nets, and safety goggles © 2007, TESCCC page 1 of 32
2.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 GETTING READY FOR INSTRUCTION Performance Indicator(s): In a graph organizer, explain how you classified the properties of substances before and after mixing. In a short summary, evaluate and explain what influence the properties of substances had on each after mixing. Key Understandings and Guiding Questions: Changes made to substances may affect their properties. — Describe the advantages and disadvantages of causing a substance to change? — What properties help you to separate different substances in a mixture? Actions over time can create measurable change — How does mixing affect the dissolving of ingredients? — Why does dissolving take time to be noticeable? Vocabulary of Instruction: mixture magnetism ingredient matter ingredient dissolve physical properties substance heat resistant physical state solution Materials/Resources: Paper to create Strainers Italian salad student journal Plates dressing (opt) Hand lenses Cup of pepper and Mixture 1 in baggies Magnets water with as many items 3 bowls (per group) Chocolate chip from the following: 1 larger bowl (1 per cookie paper clips, tile, group) Soft drink staples, cubes, Pebbles Bottle of lemonade, cereal, beans, Water Cup or bottle of tea thumb tacks, Mulch (or wood Cup of chicken pennies, and plastic chips) noodle soup, chunky beads Craft sticks applesauce Baggies of sand and Bottle of salt water Cup or bottle of gravel (1 per group) Bottle of kool-aid coffee Tweezers Dirt ©2007, TESCCC
3.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 8 small clear plastic Two plastic clear 3 small clear plastic cups (per group) cups (per group) cups (per group) Water Sugar cube (per 3 sugar cubs (per Vinegar group) group) Graduated cylinder Granulated sugar Timer Masking tape (per group) Hot water Metric measuring Two stopwatches Cold water spoon (per group) Water at room Sugar Graduated cylinder, temperature Small rocks or (per group) Calculator pebbles Masking tape Poster board Sand Triple beam balance Construction paper Salt Distilled water Sweeten iced tea Oil Hot plate Goggles Beaker Advance Preparation: 1. Set up a computer projector and computer to present Mixtures Power Point 2. Make baggies (Mixture 1) for the groups in explore activity, before the classroom starts and remember to place as many items from the following: paper clips, tile, staples, cubes, cereal, beans, thumb tacks, pennies, and plastic beads into the baggies. 3. Make baggies (Mixture 2) for the groups of sand and gravel, for explore activity, before the classroom starts. 4. Get the mulch in advanced and if it has other material such as soil, clean it up and only provide the mulch (Wood) for the students. 5. For Engage activity, have an overhead projector and Power point Examples and Non- Examples. Before the students come into the classroom, randomly place all the materials on top of students’ desks. 6. Handout: Separating Mixtures (One per student) 7. Handout: Created Mixtures (One per student) 8. Handout: Story Writing: Mixtures Rubric (One per teacher) 9. Handout: Example and Non-Example Handout (One per student) 10. Handout: Solutions in a Cup Handout (One per student) 11. Handout: Dissolving Sugar Handout (One per student) 12. Handout: Mini-board Picture (One per group) 13. Handout: Exploring Mixtures Handout (One per student) 14. Handout: Tea Party Handout (One per student) Background Information: A mixture consists of two or more substances that do not react chemically. One of the most important concepts to relay about mixtures is that simple mixtures can be separated by mechanical means. The ingredients in mixtures do not form new ©2007, TESCCC
4.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 physical properties. Instead, the ingredients of a mixture retain their original properties. Mixtures can be separated by physical means such as manual separation, by weight, use of magnets, filtering, and evaporation. Solutions are mixtures that are the result of a solute dissolving in a solvent. The solute is the substance that is dissolved in another substance. Solutes can be solids, liquids, and gases. The solvent is the substance that dissolves another substance. Water is commonly used as a solvent. It is important for the student to learn what substance is being dissolved and what substance is doing the dissolving. INSTRUCTIONAL PROCEDURES Notes for Teacher ENGAGE Approximate time: Period 1. Say, “We have been talking about matter and its Materials Needed: physical properties. What helps us distinguish the physical properties of matter?” Allow students to respond. Some student responses might be: Tools help us measure different Power point Mixtures observable properties, characteristics help us observe properties, and our five senses can help us Teacher Note: observe properties. Allow the students to 2. Say, “The use of our five senses helps us identify understand mixtures first an object. We can identify a certain type of matter before you introduce them to by observing with our eyes, touching, hearing, solutions. Let the students smelling (waft), and tasting when instructed by the learn about plain mixtures teacher. Other ways to identify matter is by before you introduce measuring.” solutions. 3. Open the power point on mixtures and go to the first slide. Ask, “Look at the picture and just by observing the unique properties of each substance, can you tell me what is there?” Teacher Note/TAKS Allow the students to respond. “What unique Strategy: properties of each substance allow you to say It’s Important for the that there is kiwi, strawberry, grape, etc.? Is students to know that when there more than one substance in this we observe we can do it by picture? What is the difference between this using our five senses and fruit salad and a normal fruit?” Allow the measuring. Questions on the students to conclude that there is more that one TAKS test have been related substance in the fruit salad. to the five senses. 4. Go through the next slides and ask them if there is more than one substance on the following pictures. Remind the students to look for the unique properties of substances so that it can help them distinguish the different substance that are in each © 2007, TESCCC page 4 of 32
5.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher picture. 5. Ask: Was there more than one substance on each picture? Can we separate these substances? What can we name it when there are two or more types of matter that are mixed together, but can still be separated?” 6. Tell the students that when two or more substances are combined together and can be separated, is called a mixture. 7. Allow the students to place what they learned in their journals. EXPLORE Approximate time: Period Mixture 1 1. Address safety guidelines provided under Instructional Procedure above. Materials Needed: 2. Divide class into groups and assign roles as Mixture 1 needed. Handout Separating 3. Teacher distributes baggies with Mixture 1 to Mixtures groups. paper to create student 4. Students write prediction of what substances will journal be magnetic. hand lens 5. Keeping the mixture in the bag, students use a Mixture 1 in baggies with hand lens to study what substances may be in the as many items from the bag and illustrate observation in Separating following: paper clips, Mixtures Handout or student created journal. tile, staples, cubes, 6. Students run a magnet along the outside of the cereal, beans, thumb bag, make observations and record in Separating tacks, pennies, and Mixtures Handout or student journal. plastic beads 7. Students record what substances made up Mixture 1 and record in Separating Mixtures handout and student journal. © 2007, TESCCC page 5 of 32
6.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher EXPLAIN Approximate time: Period 1. Ask: Were you able to separate this mixture? What other way could we had separated this mixture? What substances did you find to be magnetic? These substances represent what state of matter? (ex: solid being mixed with solid) What unique properties do these substances exhibit that helped you to come out with this conclusion? Where your predictions correct?” 2. Allow the students to answer their questions and write them down in their journals. EXPLORE Approximate time: Period Mixture 2 1. Address safety guidelines provided under Instructional Procedure. Materials Needed: 2. Each student should be wearing goggles. Mixture 2 3. Teacher distributes baggies of sand and gravel. Handout: Separating 4. Teacher challenges students to separate the sand Mixtures from the gravel in a quick and efficient way. baggies of sand and 5. Review the tools available (tweezers, strainers, gravel (1 per group) plates, hand lenses, magnets) and groups will tweezers decide what they need and record in Separating © 2007, TESCCC page 6 of 32
7.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher Mixtures Handout. strainers 6. Students record their plan of action to separate the plates sand and gravel in Separating Mixtures Handout. hand lenses 7. Before starting, students should get prior approval magnets from teacher. goggles 8. Students begin separating the sand and the gravel and raise their hands as soon as they have completed task. EXPLAIN Approximate time: Period 1. Ask students to present some ways of how their group separated the mixture. 2. Ask: In what other manner could we had separated this mixture? What were the two solids that were mixed together? Did the sand and gravel loose their physical properties when they were mixed together? Did they loose their physical properties when they were separated?” 3. Inform the students that by observing the properties of the substances they were able to separate the mixture. 4. Allow the student to write their responses on their journals. EXPLORE Approximate time: Period Mixture 3 1. Review with the students about mixtures and what they learned the day before. Materials Needed: 2. Address safety guidelines provided under Mixture 3 Instructional Procedure. Handout: Separating 3. Divide class into prior groups and assign group Mixtures roles as needed. 3 bowls (per group) 4. Give each group the materials that they will need, 1 larger bowl (1 per including the three bowls of substances. Each group) group should get a bowl of pebbles, water, and pebbles mulch (or wood chips). water 5. On Separating Mixtures Handout predict which of mulch (or wood chips) the following items will float and draw an craft stick © 2007, TESCCC page 7 of 32
8.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher illustration. tweezers 6. Pour the material from the three bowls into the strainers larger bowl and stir them with the craft stick. plates 7. Allow some time for substances to settle. hand lenses 8. Say, “Use the tools to separate the mixture.” magnets 9. Allow the students to choose their tools to separate their mixture. They are to place the substances back to their original bowls. 10. Allow the students to complete their results from Separating Mixtures Handout or to write their results into their journals. EXPLAIN Approximate time: Period 11. Ask: TAKS Strategy: Were your predictions correct? You may want to allow the The three substances represented what states students to write a T-Chart of matter? on their journals so that they Did they loose their physical properties when can write the attributes of they were combined together? mixtures under the word What is one physical property observed when Mixture. Ex. wood was mixed together with water? 12. Allow the students to complete their results in Mixtures Separating Mixtures Handout and write their responses in their journals. -When two or more types of matter are mixed together and can still be separated 13. Say, “The mixtures that we worked on are simple -Do not mix evenly Ex. examples of mixtures. Remember that mixtures -Water and Wood -Sand and Water occur when two or more types of matter are mixed -Iron Filings and Sand together but can still be separated.” -Pepper and Salt 14. Instruct the students to go to their homes and create a mixture for homework. Students should seek parent permission for this project. Students should bring their mixture the next class day. Solutions will be added on 15. They may place not more than three substances in the right side of the chart their mixture and it should be placed in a plastic during the next lesson. sandwich bag or a small jar. 16. Remind the students what the attributes are that make a simple or plain mixture. © 2007, TESCCC page 8 of 32
9.
Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher EXPLORE Approximate time: Period 1. Have each student take out the mixture they created for homework. Materials Needed: 2. Put the students into groups. Each student will Handout: Created display their mixture to the group. Other Mixture members of the group will have to observe the craft sticks mixture and look for the physical properties of the tweezers items that are joined together. The students will strainers decide which tools would be the best choice to plates separate the mixture. hand lenses 3. Allow the students to write down their predictions magnets of what tools they would use on the Created Mixture Handout. Teacher Note: If a student 4. Once the students are done observing and writing brings a solution, mention their predictions of tool selection for all four that this is also a mixture but mixtures, ask the students to choose one of the that it will be covered later four mixtures. on in the lesson. 5. Their job will be to separate the mixture using the tools that they planned to use. 6. Students will need to get teacher approval before they begin their task. 7. Allow the students to discuss their work and write summary about mixtures in Created Mixture Handout and in their journals. Make sure to have as many tools as possible for the students. If there is a tool that is missing, the students will have to improvise with © 2007, TESCCC page 9 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher the tools that are available and use something else. EXPLAIN Approximate time: Period 1. The students will choose a mixture from their list in the Created Mixture Handout. They will create and illustrate a short story explaining the following Handout: Story Writing information: states of matter, physical properties, Mixtures Rubric changes that the mixture went/did not go through, and separation techniques. 2. Use the Story Writing Mixtures Rubric Handout to check for understanding. INSTRUCTIONAL PROCEDURES Notes for Teacher ENGAGE Approximate time: Period 1. Before the students come into the classroom, randomly place all the materials on top of Materials Needed: students’ desks. Handout: Example and 2. Review with the students what mixtures are and Non-Example how a mixture is made when two or more types mixtures and solutions of matter are mixed together, but can still be power point separated. bottle of salt water 3. Pass out Example or Non-Example Handout bottle of kool-aid and explain to the students that they will use italian salad dressing this graphic organizer in this activity. cup of pepper and water 4. Say, “I am thinking about a special kind of chocolate chip cookie mixture. Please listen to the clues and soft drink determine the type of special mixture I have in bottle of lemonade mind.” cup or bottle of tea 5. Open up the Mixtures and Solutions power cup of chicken noodle point. soup 6. Say, “Let’s look at the following items. Enter chunky applesauce each item as an Example or a Non-Example of cup or bottle of coffee the special type of mixture on your graphic © 2007, TESCCC page 10 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher organizer.” dirt 7. Display the first slide which has a picture of salt water and Kool-aid as examples of the special type of mixture. 8. Say, “Write down salt water and Kool-aid on the example column on your paper. These two are Mixtures and Solutions examples of the special type of mixture. If you power point have a bottle of Kool-aid or salt water, please bring it to the front of the class.” Allow the Teacher Note: students who have the samples to display them Use of real objects that to the rest of the class. Once they display the represent other objects helps samples of kool-aid and salt water, instruct the the ELL/LEP student make students to leave them in front of the classroom connections in language. so that everyone can see. Allow the students some time to write down their examples on the graphic organizer. 9. Go to the next slide and say, “Write down Italian salad dressing and pepper with water in the non-example column. These two are non- examples of the special type of mixture.” 10. The students who have these samples should bring them to the front and display for the rest of the classroom. Allow them some time to write it in their graphic organizer, Examples or Non-Examples Handout. 11. Go to the next slide. Say, “I will give you some more samples and you have to determine if they are examples or non-examples of the special type of mixture. As we do this activity, write down some ideas and properties that you think might help you determine the special type Teacher Note: of mixture.” Make sure you pass out the 12. Continue with the power point, with each slide items before the activity. Do ask the students to determine if the substance not mention that you will be is an example of the special mixture or a non reviewing solutions yet. example. 13. Encourage the students to write some of the TAKS Review ideas and properties of the samples that might While you review with the help them determine the special type of students about mixtures you mixture. might want show them this 14. Complete the power point and then show them T-Chart that you previously the results. Allow them to check their work and used to review. Ask the correct their work. students to retrieve it from 15. Once they correct their work, allow them to their journals if appropriate. © 2007, TESCCC page 11 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher have an open discussion about what items were examples or non-examples. Mixtures 16. Ask: What are the similarities in appearance of -When two or more the examples? types of matter are mixed together and What do these examples have in common? can still be separated Is it possible to tell the difference between -Do not mix evenly the examples and non-examples based on Ex. -Water and Wood appearance? -Sand and Water -Iron Filings and What are some of the ideas and physical Sand -Pepper and Salt properties that allow you to distinguish the difference between them?” 17. Guide the students to the idea that the Examples and Non-Examples may be distinguished on the basis of the uniform or non-uniform appearance or other properties of the special type of mixture. 18. Say, “The properties of the hot tea, and the salt water are that they seem to be uniform or evenly mixed. Can you see the salt? Can Teacher Note: you see the powered tea?” Some students might still 19. Say, “Which of the items are non-uniform have problems or not evenly mixed?” Direct the students to understanding or grasping conclude that the non-examples are non- the attributes of solutions uniform and are not evenly mixed. and might still not fully 20. Say, “We call the Non-Examples just simple or understand the difference plain mixtures. We learned about simple between mixtures and mixtures previously in this lesson. The special solutions. This is only an type of mixture is called a solution. Solutions introduction to the lesson are mixtures in which different kinds of matter and the students will get are spread out evenly.” more examples and 21. Allow the students to write this information on explanation on the concept their journals. during this lesson. EXPLORE Approximate time: Period 1. Review/recap Day One activities and vocabulary. 2. Ask “What are some substances that will not dissolve in water? What are some Materials Needed: substances that do dissolve in water?” Handout Solutions in a Cup 3. Address safety guidelines. Two plastic clear cups © 2007, TESCCC page 12 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher 4. Divide class into small groups. (per group) 5. Teacher distributes two cups, a sugar cube, sugar cube (per group) some granulated sugar, two stopwatches, and granulated sugar (per graduated cylinder to materials manager and group) Solutions in a Cup Handout (per student). two stopwatches (per 6. Teacher reviews procedure and facilitates by group) rotating among groups. graduated cylinder (per 7. Students label one cup as sugar cube and the group) other as granulated sugar. masking tape 8. Students record the mass of the sugar cube triple beam balance using a triple-beam balance in Solutions in a distilled water Cup Handout. 9. Students use the triple-beam balance to obtain about the same mass as the sugar cube for the granulated sugar and record in Solutions in a Cup Handout. 10. Students write a hypothesis about what will happen in each cup in Solutions in a Cup Handout. 11. Students pour about 100 ml of distilled water into each cup. 12. Students use both stopwatches to begin keeping time as soon as the sugar cube and granulated sugar are dropped into the appropriate cups (at the same time). 13. Students observe what happens to the sugar cube and granulated sugar over time. 14. Student stops each stopwatch when all of the sugar is dissolved in each cup. TAKS Strategy: 15. Students record how long it took for the sugar Make sure to encourage the cube and granulated sugar to completely students to observe what dissolve in Solutions in a Cup Handout. Variable is being 16. Allow the students to create a graph of their manipulated. Here the results on their journals. Variable would be Type of Surface Area © 2007, TESCCC page 13 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher Variable Result What ever is being Result is the manipulated, outcome of the changed, different experiment Variable will always start with: Different Type of Different Amount of Different Size of When you write the Problem, you use the Variable + Result = Problem Example: Variable =Type of Surface Area Result = Dissolve the fastest (Rate of dissolving). Problem = What different type of surface area in sugar will dissolve the fastest? Hypothesis = I believe that the granulated sugar will dissolve the fastest. EXPLAIN Approximate time: Period 1. Ask students to share their rate of dissolving sugar in each cup. 2. Ask: What happens to sugar when it dissolves in water? How does mixing affect the dissolving of ingredients? Why does dissolving take time to be noticeable? Allow the students to explain and write their responses into their journals. 3. Ask: Was your hypothesis correct? © 2007, TESCCC page 14 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 INSTRUCTIONAL PROCEDURES Notes for Teacher 4. What else could we have done on this experiment to make it more reliable? Students write a conclusion about how size of surface affects the rate of dissolving sugar in water using Solutions in a Cup Handout. EXPLORE/EXPLAIN Approximate time: Period 1. Bring class together for final observation. 2. Teacher pours the solution from either cup into a beaker and heats it on the hot plate. Materials Needed: 3. Ask: Handout: Solutions in a What do you think is going to happen? Cup Why? Hot plate 4. Continue heating until all of the water is gone. beaker 5. Students observe what is left at the bottom of the beaker. 6. Make sure to let them know that the same Safety: amount of sugar that they started with should be Make sure that the students there at the bottom of the beaker. (Unless some don’t get too close and to of it stayed in the other cup. The main point is wear their goggles. that the sugar did not evaporate) 7. Students explain what happened to the solution Teacher Review: when heat was applied in Solutions in a Cup This would be a good time Handout. review the changes in states 8. Review vocabulary of instruction: dissolve, of matter. mixture, ingredient, substance, solution, heat Liquid Gas (Evaporation resistant Process) EXPLORE Approximate time: Period 1. Review/recap the previous day activities and vocabulary. 2. Teacher models safety guidelines. Materials Needed: 3. Introduce vocabulary of instruction. Handout: Dissolving 4. Divide class into small groups and assign roles. Sugar 5. Say, “Today you will be working on an 3 small clear plastic cups experiment. You will have to work in groups, (per group) but you will each have to turn in individual 3 sugar cubs (per group) work” © 2007, TESCCC page 15 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 6. Pass out Dissolving Sugar Handout. Timer 7. Ask: “Your Problem will be: What different hot water temperatures of water will allow the sugar cold water cube to dissolve at a faster rate?” water at room 8. Instruct the students to find the variable that is temperature being manipulated in this experiment. Guide calculator the students to say that the variable is different poster board temperatures. construction paper 9. Allow the students to fill out as much as they can in the Dissolving Sugars Handout. Teach Note: 10. Before the experiment is conducted they should You may also ask a different be able to fill in the variable, problem, question such as: What hypothesis, and materials. different temperatures of 11. Each student will get three small clear plastic water will allow the sugar cups and three sugar cubes. cube to dissolve at a 12. Allow them to label the cups as follows: hot slower rate? water, room temperature water, and cold water. 13. They should place one sugar cube into each cup, Handout: Dissolving Sugar all at the same time. 14. The student responsible for time should keep time and wait until the cubes dissolve. 15. Students record their results in their data charts as the cubes dissolve. 16. Students will repeat this experiment three times for reliability. 17. Once the students record their data in the Dissolving Sugar Handout, instruct them to find an average of the three trials that were conducted. 18. Allow the students some time to work on their data and their graph. 19. When they finish their data and graph, allow TAKS Strategy: them some time to finish their procedure and Remember to use the T- conclusion Chart from above on 20. For their conclusion they should consider their variables and results to help hypothesis and justify why sugar cubes dissolve the students review the faster in some different temperature water. problem and write the 21. Instruct the students to make a mini-board. hypothesis. The mini-board can be created by getting a large paper such as the legal size paper, cut a poster board in half, or a white blank book cover. 22. After getting the background paper, divide it Handout: Mini-board into three even sections such as in the Picture Dissolving Sugar Handout. The students can then use construction paper to label the mini- © 2007, TESCCC page 16 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 board and write everything from the Dissolving Sugar Handout into the mini-board. Look at the picture of the Mini-board Picture Handout as an example. EXPLAIN Approximate time: Period 1. Ask: What was your conclusion? Was your hypothesis correct? What substance dissolved? Why do you think the hot water allowed the sugar cubes to dissolve the fastest? Help students understand that the more energy that is in water the faster the molecules are moving and the faster the sugar will dissolve. 2. Ask: What properties do we now know about hot water? Why does dissolving take time to be noticeable? What influence did the properties of each substance have on each other after mixing? Direct the students to conclude that adding water to the sugar caused the sugar to dissolve and a mixture of uniformity (homogenous) was created which is a solution. 3. Once you have a discussion with the groups allow the groups to talk to their peers about their results, hypothesis, and conclusion. 4. Allow students some time to display their mini- boards while they explain the results and conclusions during the classroom discussion. ELABORATE Approximate time: Period 1. Teacher models safety guidelines and every student should be wearing goggles. Material Needed: 2. Introduce vocabulary of instruction: Mixture, Handout Exploring Solution, Ingredient, Substance, and Dissolve. Mixtures © 2007, TESCCC page 17 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 3. Divide class into small groups assign roles as 8 small clear plastic cups needed. (per group) 4. Give materials to groups. Water 5. Each student will receive Exploring Mixtures Vinegar Handout. They need to complete it, while working graduated cylinder on their activity. masking tape 6. Instruct the students to follow the Lab procedure metric measuring spoon from Exploring Mixtures handout. sugar 7. Inform them to work on each cup at a time and not small rocks or pebbles to do them all at the same time. sand 8. While they are mixing these materials together, salt they need to write down the results as either an oil example of a solution or not an example of a goggles solution. The students, also, need to fill out the other column of Exploring Mixtures Handout. Handout: Exploring Mixtures They need to write down if the mixture is a solution or not a solution. 9. After the students complete the lab, allow the students to talk within their groups about the activity. 10. Ask: What happened to mixtures 1, 4, 5 and 8? What seemed to disappear on these mixtures? Do you think that the substances are still Safety: there? Make sure that What are some of the unique properties that the students are make these mixtures solutions? wearing their What would happen if I would add more salt goggles. to mixture # 4? Guide the students to the respond that it would become saturated. Explain TAKS Strategy: that we would have to add more water to fix the When a student writes down problem. M (Mixture) or MS 11. Ask: (Mixture/Solution), this is a Why are these solutions still considered good strategy by using the mixtures? Direct the students to respond that two process of elimination. For or more substances are being mixed together. example, Which of these 12. Ask: mixtures is evenly mixed? From these solutions what substance was A. fruit Salad (M) being dissolved? B. Oil and water (M) What substance was doing the dissolving? C. Salt water (MS) 13. Allow the students to correct anything from their D. Salad (M) work and write notes in their journals. TAKS Review: While you review with the students about mixtures and solutions you might want © 2007, TESCCC page 18 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 show them this T-Chart that you previously used to review. Now you can add the attributes of solutions into the second column. Ask the students to retrieve it from their journals. Mixtures Solutions -When two or more -Is a mixture types of matter are -Mix evenly mixed together and -Something Gets can still be Dissolved separated -Do not mix evenly Ex. Ex. -Salt Water -Water and Wood -Kool-Aid -Sand and Water -Sugar and Water -Iron Filings and -Vinegar and Salt Sand -Pepper and Salt EVALUATE Approximate time: Period 1. Review with the students everything they have covered during the week including vocabulary words. Materials Needed: 2. Give each student Tea Party Handout. Handout: Tea Party 3. Place a small amount of sweetened iced tea and a Sweetened iced tea cup of water on each of the students’ desks. water 4. Say: In the graphic organizer (Tea Part Handout), explain how you classified the properties of Handout: Tea Party substances before and after mixing. In a short summary, evaluate and explain what influence the properties of substances had on each after mixing. 5. After the students complete the Tea Party Handout allow them to drink their solution as they have a discussion from their results. © 2007, TESCCC page 19 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Separating Mixtures Mixture 1 Prediction of magnetic item: Actual magnetic item: Illustration of observation Illustration of magnet swipe Mixture 2 Tools Plan of Action © 2007, TESCCC page 20 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Separating Mixtures Mixture 3 Prediction of ingredients that will float: 1. 2. Actual ingredients that did float: 1. 2. Illustration of Prediction Illustration of mixture © 2007, TESCCC page 21 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Created Mixtures Name of Student Physical Properties Physical Properties Physical Properties of 1st Item of 2nd Item of 3rd Item What tools to What tools to What tools to separate it from separate it from separate it from mixture mixture mixture © 2007, TESCCC page 22 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Created Mixtures Summary ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ © 2007, TESCCC page 23 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Story Writing: Mixtures CATEGORY 4 3 2 1 Accuracy of Facts All facts presented in the Almost all facts presented Most facts presented in There are several story are accurate. in the story are accurate. the story are accurate factual errors in the (at least 70%). story. Creativity The story contains many The story contains a few The story contains a few There is little evidence creative details and/or creative details and/or creative details and/or of creativity in the story. descriptions that descriptions that contribute descriptions, but they The author does not contribute to the reader's to the reader's enjoyment. distract from the story. seem to have used enjoyment. The author The author has used The author has tried to much imagination. has really used his/her his/her imagination. use his/her imagination. imagination. Requirements All of the written Almost all (about 90%) the Most (about 75%) of the Many requirements requirements (states of written requirements were written requirements were not met. matter, physcial met. were met, but several properties, changes or were not. non changes that mixture went through, and separation techniques) were met. Illustrations Original illustrations are Original illustrations are Original illustrations Illustrations are not detailed, attractive, somewhat detailed, relate to the text on the present OR they are not creative and relate to the attractive, and relate to the page. original. text on the page. text on the page. © 2007, TESCCC page 24 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Examples and Non-Examples I’m Thinking of a Special Type of Mixture Example: Non-example: Ideas 1. 2. 3. 4. 5. © 2007, TESCCC page 25 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Solutions in a Cup Write a hypothesis about what will happen in each cup. Dissolving Sugar Cubes Cup Sugar Mass Time to Dissolve Write a conclusion about how size affects the rate of dissolving sugar in water. Explain what happened to the solution when heat was applied. © 2007, TESCCC page 26 of 32
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Subject/Grade Level or
Course Unit: 1 Lesson: 2 Tea Party Properties of Properties of Substance Before Substance After Mixing Mixing Sweet Iced Tea Water Summary ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ © 2007, TESCCC page 27 of 32
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Science/ 5th Grade
Unit: 01 Lesson: 02 Exploring Mixtures # Mixture Results TAKS Strategy Is it an M (Mixture) or MS (Mixture/Solution) Ex. Water (Liquid) + Tea (Solid) Example of a Solution This mixture is a solution = MS Ex. Water (liquid) + Wood (Solid) Non-Example of a Solution This mixture is NOT a solution = M 1. Water (Liquid) + Sugar (Solid) 2 Water (Liquid) + Rocks (Solid) 3. Water (Liquid) + Sand (Solid) 4. Water (Liquid) + Salt (Salt) 5. Vinegar (Liquid) + Sugar (Solid) 6. Vinegar (Liquid) + Sand (Solid) 7. Water (Liquid) + Oil (Liquid) 8. Vinegar (Liquid) + Salt (Solid) © 2007, TESCCC page 28 of 32
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Science/ 5th Grade
Unit: 01 Lesson: 02 Exploring Mixtures Lab Procedure 1. Label eight, nine ounce clear cups, as cup 1, cup 2, etc., and the write substance that will be in each cup. For example: Cup #1 Water and Sugar 2. Add 50 ml of water into the five cups that have water labeled as one of the substances. 3. Add 50 ml of vinegar into the three cups that have vinegar labeled as one of the substances. 4. Place 1 ml of sugar into the cup labeled cup 1. 5. Record and observe your results on Exploring Mixtures Handout. 6. Place a pinch of rocks into cup 2. 7. Record and observe your results on Exploring Mixtures Handout. 8. Place 1 ml of sand into cup 3. 9. Record and observe your results on Exploring Mixtures Handout. 10. Place 1 ml of salt into cup 4. 11. Record and observe your results on Exploring Mixtures Handout. 12. Place 1 ml of sugar into cup 5. 13. Record and observe your results on Exploring Mixtures Handout. 14. Place 1ml of sand into cup 6. 15. Record and observe your results on Exploring Mixtures Handout. 16. Place 50 ml of oil into cup 7. 17. Record and observe your results on Exploring Mixtures Handout. 18. Place 1 ml of salt into cup 8. © 2007, TESCCC page 29 of 32
30.
Science/ 5th Grade
Unit: 01 Lesson: 02 Dissolving Sugar Problem Results Materials What different temperatures of water will allow the sugar cube to Data Trail 1 Trail 2 Trail 3 Average dissolve at a faster rate? Hot Water Room Hypothesis Temp. Water Cold Water Procedure Graph Conclusion Variable © 2007, TESCCC page 30 of 32
31.
Science/ 5th Grade
Unit: 01 Lesson: 02 Picture Example of A-Mini-board © 2007, TESCCC page 31 of 32
32.
Science/ 5th Grade
Unit: 01 Lesson: 02 © 2007, TESCCC page 32 of 32
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