Name: _________________________________________Date: _____________Period: _____
Assessment Review for Lessons 5, 6, 7, and 8
1. What is the source (input) of thermal (heat) energy in this system?
a. Coils in Heater
b. Air in the middle of the room
c. Air near the window
2. On the diagram, Show the movement of the energy in the system
using arrows.
Wi
nd
ow
Window
Heater
3. Color the warmer air arrow red and the cooler air arrow blue.
4. What type of a heat transfer is this?
5. How is the volume of the air near the heat source changing?
a. The volume is staying the same.
b. The volume is decreasing.
c. The volume is increasing.
6. Explain why the volume of air is changing. What are the particles doing near the heat
source?
7. How is the density of the air near heat source changing?
a. The density is staying the same.
b. The density is decreasing.
c. The density is increasing.
8. How is the kinetic energy (speed of the particles) of the air near heat source changing?
a. The kinetic energy is staying the same.
b. The kinetic energy is decreasing.
c. The kinetic energy is increasing.
9. After studying the diagram in question 1, Bob and Sarah try to explain why the volume of the
air increases. Sarah says “the warmer particles are going faster and move further apart”. Bob
disagrees, he says, “the particles don’t just move farther apart the particles themselves are
growing bigger.”
a. Who do you agree with? ________________________
b. In your own words, explain what the particles are doing to cause the volume to
increase when a substance is heated.
10. If you have a 50 gram metal ball at 30 degrees Celsius and you cool the metal ball to 2
degrees Celsius, what happens to the mass (the number of particles) in the ball?
a. The mass stays the same.
b. The mass decreases.
c. The mass increases.
11. Explain why your answer is correct.
Use the heat curve to answer the following questions:
12.
13.
14.
15.
Approximately, what is the boiling point of the substance? ________
Approximately, what is the melting point of the substance? ________
About how long does it take until the substance completely melted? _________________
At 40 degrees C, what phase(s) of matter is the substance? _________________
Identify the following statements as a solid, liquid or gas:
16. Lowest amount of kinetic energy (particle movement). _______________
17. Definite volume and definite shape (shape and volume stay the same). ________________
18. Particles are farthest apart and move independently of each other. __________________
19. Particles have a definite volume and take the shape of their container. _________________
20. Directions: Fill in the following chart.
Phase Change
Beginning
Ending Phase
Phase
Melting
Freezing
Boiling/Evaporation
Condensing
Liquid
Solid
Input or Output Change of Kinetic
of Energy for
Energy
Phase Change to (particle speed)
Happen?
Increases
Output
Liquid
Liquid
Decreases
21. Define the following words:
Freezing:_____________________________________________________________________
______________________________________________________________________________
Melting:______________________________________________________________________
______________________________________________________________________________
Boiling:_______________________________________________________________________
______________________________________________________________________________
Condensing:___________________________________________________________________
______________________________________________________________________________
Boiling/evaporating (vaporization):
______________________________________________________________________________
______________________________________________________________________________
22. Name and describe each of the three types of heat transfers:
Heat Transfer #1: ________________________
Description:
__________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Heat Transfer #2: ________________________
Description:
__________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Heat Transfer #3: ________________________
Description:
__________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
23. How would 10 particles of a solid, liquid, and gas behave when placed in a cylinder. In
each cylinder, draw the 10 particles the way that you think they would look.
Solid
Liquid
Gas
Explanation of why the
particles look like this.
(Mention their kinetic energy
and density).
Explanation of why the
particles look like this.
(Mention their kinetic energy
and density).
Explanation of why the
particles look like this.
(Mention their kinetic energy
and density).
For questions 24 – 26 use your notes and review to help you.
24. What does temperature measure?
______________________________________________________________________________
______________________________________________________________________________
25. Describe what is happening to particles of a material when heat energy is transferred to
the material and the temperature increases.
______________________________________________________________________________
______________________________________________________________________________
26. What happens to the temperature of a material when the material is undergoing a change
of phase (for example, from a solid to liquid)?
______________________________________________________________________________
______________________________________________________________________________
27. Container A contains air (a gas). You transfer all the particles from container A to container
B. Draw how the particles will be arranged. (Still a gas) when they are in container B.
Explain why your particle drawing makes sense.
Will there be more, less or the same number of particles in
Container A
Container B
Container B after you transfer the particles? Explain.
28. After lunch one day, your friend brings in to science class, a snowball that has a mass of 18
grams. You place the snowball in an empty plastic container and seal the container.
a) What will be the mass of the snowball when it melts into a liquid? ___________________
b) Explain why your answer is correct.
______________________________________________________________________________
______________________________________________________________________________
29. Identify each picture below as an example of heat transfer: Radiation, Convection or
Conduction:
What is going on inside the pot of liquid? ______________________________
__________________________
_______________________________