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Unit 4: Thermal Energy

Total questions: 40

Worksheet time: 57mins

Name
Class
Date
1.

Which of the following pictures represents particles in a solid?

a)
b)
c)
d)

None of the options represent particle in a dolid.

2.

The molecules of which of the following would have the most kinetic energy?

a)

an ice cube

b)

a glass of cold water

c)

boiling water

d)

a cup of warm tea

3.

If you drop red hot metal into a pool of room temperature oil, what statements are true about heat transfer between the two objects?

a)

Heat flows from the oil into the metal.

b)

Heat flows from the metal into the oil.

c)

There is no heat flow between the metal and the oil.

d)

Heat flows back and forth between the metal and the oil simultaneously.

4.

Temperature is a way to measure the ___________ energy of particles of matter.

a)

potential

b)

kinetic

c)

chemical

d)

electrical

5.

Which of the following objects would be best at keeping its contents cold?

a)
b)
c)
d)
6.

Which of the following statements is not true about states of matter and kinetic energy?

a)

As temperature increases so does the kinetic energy.

b)

As the number of particles increases so does the kinetic energy.

c)

As temperature decreases, the particles move closer together.

d)

Fewer particles means there is more kinetic energy.

7.

Select the graph that shows a steady increase in temperature as time passes.

a)
b)
c)
d)
8.

Which of the following is a factor that determines thermal energy?

a)

Mass

b)

Heat

c)

Transfer of thermal energy

d)

Conduction

9.

Specific heat is

a)

The amount of thermal energy needed to raise the temperature of 1 kg of a substance by 1 degree celsius

b)

The amount of kinetic energy needed to raise the temperature of 4 kg of a substance by 3 degrees Fahrenheit

c)

The amount of heat required to raise 10 mg of a substance by 40 degrees celsius

d)

The amount of temperature to raise 1 kg of a substance by 1 degree Kelvin

10.

What is a conductor?

a)

A material in which kinetic energy transfers easily

b)

A material in which kinetic energy does not transfer easily

c)

A material in which mass is transferred easily

d)

A material in which mass is not transferred easily

11.

An insulator

a)

Transfers kinetic energy well

b)

Transfers mass well

c)

Does not transfer kinetic energy well

d)

Transfers matter well

12.

Which makes the best conductor

a)

Water

b)

Plastic

c)

Wood

d)

Aluminum metal

13.
Which particles are moving fastest?
a)
Particles in ice.
b)
Particles in boiling water.
c)
Particles in water from the sink.
d)
Particles in steam.
14.

a)

conduction

b)

convection

c)

radiation

15.

a)

conduction

b)

convection

c)

radiation

16.

a)

conduction

b)

convection

c)

radiation

17.

a)

conduction

b)

convection

c)

radiation

18.

a)

conduction

b)

convection

c)

radiation

19.

a)

conduction

b)

convection

c)

radiation

20.
 How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?    
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
21.
When the 2nd story of a house is warmer than the 1st floor of a house is heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal equilibrium
22.
A material was cooled from 100ºC to 40ºC.  What is the temperature change?
a)
60ºC
b)
40ºC
c)
-60ºC
d)
-40ºC
23.

What quantity does this equation help you calculate?

a)

melting point of a substance

b)

change in thermal energy

c)

the potential energy of an object

d)

the room temperature of a reaction

24.

What is the change in thermal energy of a 20 kg wooden chair that warms from 200 C to 550 C. The specific heat of wood is 700 J/(kg.C).

a)

140,000 J

b)

210,000 J

c)

490,000 J

d)

1,090,800 J

25.
 How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?    
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
26.

Which will heat up faster?

a)

copper

b)

granite

c)

iron

d)

basalt

27.

Which will heat up slower?

a)

water

b)

lead

c)

granite

d)

iron

28.
If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?
a)
100 mL
b)
1000 mL
c)
They both heat up at the same speed
d)
They cool down.
29.
When a  piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
30.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
31.
Hot coffee is stirred with a spoon; the spoon gets hot due to
a)
conduction
b)
convection
c)
radiation
32.
According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 
a)
destroyed, destroyed
b)
created, saved
c)
created, destroyed
d)
lost, found
33.
You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, this has changed.  How might you explain what happened?
a)
The cold energy from your hand transferred to your friend's hand through conduction.
b)
The heat energy from your friend's hand transferred to your hand through conduction. 
c)
The cold energy from your hand transferred to your friend's hand through convection.
d)
The heat energy from your friend's hand transferred to your hand through convection.
34.

A lava lamp is an example of which type of heat transfer?

a)

Conduction

b)

Convection

c)

Radiation

35.

What is occurring between points B and C on the heating curve above?

a)

Melting

b)

Freezing

c)

Boiling

d)

Condensing

36.

Why doesn't the temperature increase between points B and C, and points D and E on the heating curve above?

a)

Heat isn't being added.

b)

Heat is being removed.

c)

The added energy is being used to cause a phase change.

d)

Time has stopped.

37.
The graph shows a cooling curve for an unknown substance.  What is happening during segment DE?
a)
boiling
b)
condensation
c)
freezing
d)
melting
38.
What happens to the energy of particles in a substance as it changes from gas, to liquid, to solid?
a)
KE decreases
b)
KE increases
c)
KE stays the same
d)
KE goes up and then goes down
39.

What happens to the energy of particles in a substance as it changes from solid, to liquid, to gas?

a)

KE decreases

b)

KE increases

c)

KE stays the same

d)

KE goes up and then goes down

40.

After cooking an egg in boiling water, you cool the egg by putting it into a bowl of cold water. Which of the following explains the egg’s cooling process?

a)

Hot water moves from the egg to the water.

b)

Cold water moves into the egg.

c)

Energy is transferred from the water to the egg.

d)

Energy is transferred from the egg to the water.

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