PS.7a
1. The temperature at which all molecular motion stops is called ―
A
B
C
D
0 degrees Celsius.
absolute zero.
273 degrees Kelvin.
absolute Kelvin.
PS.7b
2. As a solid substance is heated, the vibration of its molecules increases.
The molecules leave their fixed positions to move and slide over each
other. What is happening to the substance?
A
B
C
D
It
It
It
It
is
is
is
is
crystallizing.
boiling.
freezing.
melting.
PS.7a
3. What temperature is absolute zero?
A
B
C
D
0K
– 273 K
0° C
273° C
PS.7c
4. What type of thermal energy transfer is used when cooking an egg in a
frying pan?
A
B
C
D
radiation
convection
vaporization
conduction
PS.7a
5. Which of the following is a measure of the average kinetic energy of the
particles in an object?
A
B
C
D
potential energy
thermal energy
temperature
specific heat
PS.7c
6. In which direction does thermal energy move?
A
B
C
D
from lower temperature matter to higher temperature matter
from higher temperature matter to lower temperature matter
from matter at one temperature to other matter at similar temperatures
in a direction to increase the temperature difference between the groups of matter
PS.7c
7. What is the name of something that can reduce the heat flow between
two materials?
A
B
C
D
an isolator
an insulator
a resistance
a reducer
PS.7b
8. When matter goes through a gas-to-liquid phase transition, it is referred
to as ―
A
B
C
D
freezing.
melting.
condensation.
evaporation.
PS.7b
9. Which of the following describes the state change when a solid changes
directly into a gas?
A
B
C
D
condensation
sublimation
melting
freezing
PS.7c
10. Which of these is an example of thermal energy transfer by conduction?
A
B
C
D
cooking carrots in hot water
drying hair with a blow dryer
pressing a shirt with a dry iron
warming water with sunlight