1. Good Morning: Feb 23, 2006 BAT: Define & Describe properties/ character istics of a compound (Progressing) Summarize “real world” examples for specific compound (Satisfactory) Design experiment to test or demonstrate properties/characteristics (Mastery) WILY : Today’s Journal Prompt - covalent bonding – “What’s the connection?” Today: 1.) WHAT’S THE BIG IDEA ? 2.) Secret Of the Universe # 5 Intro Notes & Connections Simple demonstrations 3.) Q&A / Terminology check 4.) Assignment/project selection Goal Objective Assessment Links 5.) Have Selection checked before you leave today ! Materials needed WILY Folder Field Notebook Secrets of the Universe list Valence models Sharp Pencil Pen/colored pencil(s) Today’s Objective(s) Handouts NoteKeeper (Presentation notes available) Possible Resources http://ga.water.usgs.gov/edu/ http://water.usgs.gov/education.html http://capp.water.usgs.gov/GIP/h2o_gloss/ http://www.noaa.gov/index.html
2. Mickey Mouse is the Key to Life in the Universe ( as we know it ) M I C K E Y - H 2 O H H + + ost abundant compound ce Floats lear ilocalories of energy xpands when frozen oUniversal Solvent
3. 75 % of the planet is covered with MICKEY 70 % of you is MICKEY MICKEY is in the air MICKEY is underground MICKEY is into practically everything M ost abundant compound Would an alien arriving for the first time really call this planet... Earth ??! Or would it be ..... Aqua? Life starts in an aqueous solution. Life started in an aqueous solution. Challenge: Where wouldn’t you find MICKEY?
4. I ce floats One of MICKEY ’s “unusual” properties: Solid MICKEY is less dense ( see: Secret of the Universe #4) than liquid Mickey. The calving of Icebergs from glaciers “distributes” freshwater to the marine environment. Challenge: What would happen if icebergs sank, building up on top of one another, year after year after year? Life under MICKEY continues, even when the surface is frozen solid.
5. C lear In MICKEY ’s Photic zone , Photosynthesis occurs, allowing the food chain to begin (and flourish.) While the angle of incidence affects some solar radiation, because MICKEY is transparent, light is able to penetrate the surface. Challenge: What might the effects on phytoplankton be if MICKEY Increased reflection / refraction / absorption of light?
6. K ilocalories of energy As MICKEY moves/changes from one “ state of matter ”to another, measurable energy is involved. MICKEY is a standard by which we compare/measure energy. The formula and definition of calorie Challenge What energies are involved in a water drop moving through the water cycle ? Or Where does the energy that drives a hurricane come from?
7. E xpands when Frozen When MICKEY freezes it expands by almost 10%. This erosion process, frost wedging / frost shattering , is one of MICKEY ’s contributions to “creating” new soil and releasing “rock-bound” minerals . In the winter, melting snow, in the form of MICKEY , seeps into the cracks and freezes at night, bit by bit prying and opening cracks, making them ever wider. Challenge: What are some of the “ civil ” consequences/costs of MICKEY’ s contribution to erosion?
8. Y o U niversal Solvent (Hey, some metaphors aren’t perfect) Almost everything dissolves in MICKEY. Stone, iron, pots, pans, plates, sugar, salt, and coffee beans all dissolve in MICKEY. Things which dissolve are called solutes and the liquid in which they dissolve is called a solvent . MICKEY is the great mover ; rivers, oceans, underground..... constantly moving dissolved solutes around the planet. Mickey moves dissolved nutrients from the soil into the plant. Challenge: Is Mickey’s ability to dissolve solutes affected by his temperature? It’s MICKEY ’s magnetic personality that does the trick.
9. Substances (things with positive and/or negative charges) easily attract water molecules. The water molecules surround the charged solute; positive hydrogens close to negative charges and negative oxygens close to positive charges on the solute molecule. All this interaction suspends the solute molecule in a sea of water molecules; it disperses and dissolves easily. Coming up next : MICKEY’s dipolar personality There is a positive (hydrogen) side And a negative (oxygen) side to MICKEY. Like a magnet.
10. Notekeeper: What’s the Big Idea? _______________________________ _______________________________ Date: _____/ _____/____ Preview/Predict ? _______________________________ ______________________________________________ Sketch/ diagram of _____________________________ Terminology Know it Check it Look up Put In glossary Interesting FACTOIDS Don’t forget !!______________ __________________________ Questions to ask:____________ _________________________ _________________________ _________________________ 1. (intro?)_______________________________________ 2._________________________________________________________________________________________ 3._________________________________________________________________________________________ 4._________________________________________________________________________________________ 5._________________________________________________________________________________________ ( Continue on back ? [ ] ) Aqua / aqueous angle of incidence photic zone Phytoplankton Frost wedging Mickey Mouse is the key to life in the Universe M I C K
