This document contains questions, diagrams, and explanations about states of matter and changes of state. It discusses physical changes like melting, freezing, vaporization, and condensation. These changes are endothermic or exothermic depending on whether heat is absorbed or released. The document also contains questions about using a phase change diagram to label the different states and changes between those states. It describes using a scientific method approach to analyze experiments demonstrating gas laws.
9. • Which has a higher
temperature, steam or liquid
water?
10. • Which has a higher energy,
steam or liquid water?
11. • Make a Venn Diagram
comparing liquid and gas with
regards to state of matter,
particle motion, temperature
and energy.
Liquid Gas
12. • Share your Venn Diagram with
your neighbor.
• Talk about all the ideas you know
and can explain about Liquids and
Gases.
• If time remains, talk about solids
too
Liquid Gas
23. • T or F Evaporation can occur
at any temperature.
• T or F Boiling occurs only at
the surface of a liquid.
• T or F Vaporization is simply a
liquid changing to a gas.
26. 1.What happened to the mass of the
apparatus while it heated?
2.Why did the balloon inflate?
3.What state change occurred?
4.When a liquid turns to a gas, what
happens to its mass? Volume? Density?
27. 1.What is the phase change that
converts liquids to gases?
2.What is the name of the point at
which this change occurs?
28. 1. At your table, share data and
observations from the Hot-Cold lab
with the people you sit with.
29. 1. In the Hot and Cold lab, what state
change occurred with the ice
buckets?
2.What did you do in that experiment
to lower the freezing point of the ice
below 0oC? (you do this all the time in the winter)
35. Label the five arrows below with
The name of the change of state:
SOLID LIQUID GAS
melting vaporization
sublimation
condensationfreezing
36. 1.What is the difference between
condensation and vaporization?
2.What is similar between
condensation and vaporization?
37. Warm up
1.Take out your Chapter 2
review sheet.
2.With your group members,
arrange the arrows,
pictures, and words to show
the state changes of water.
43. Scientific Method…
In a science experiment, you have
several factors:
1. Constant: the item that is not
changing throughout the experiment
2. Independent variable: The factor the
scientist is changing
3. Dependent variable: The factor that
changes because of the independent
variable
44. Vacuum Pump Demo:
What 2 variables are
being changed?
Which law is being
demonstrated?
Why do you know?
45. Glove Demo:
What 2 variables are
being changed?
Which law is being
demonstrated?
Why do you know?
47. State change graph:
Is this graph endothermic or
exothermic? Why?
What states are present at A, C, E?
What state changes happen at D, B?
A.
B.
C.
D.
E.
48. Extension…
How can you
change the boiling
point or freezing
point of water?
(Hint: you probably do this and don’t know exactly
why!)
