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Thermal Energy Unit

Total questions: 62

Worksheet time: 38mins

Name
Class
Date
1.
_________________________ is a measure of the average kinetic energy of the particles in a material.
a)
thermal
b)
friction
c)
temperature
d)
expansion
2.
The liquid in a thermometer ______________ as the temperature increases.
a)
expands
b)
disappears
c)
freezes
d)
explodes
3.
The most common temperature scale used in the world where water freezes at 0 degrees and boils at 100 degrees is called the __________________ scale.
a)
Celsius
b)
Fahrenheit
c)
Pound
d)
Kelvin
4.
The movement of thermal energy from an object at a higher temperature to an object at a lower temperature is called ____________.
a)
thermal
b)
expansion
c)
temperature
d)
heat
5.

Heat always moves from ____________ objects to ______________ objects.

a)
cooler, warmer
b)
warmer, cooler
c)
faster, slower
d)
slower, faster
6.

Heat transfer stops when the objects have the same temperature.

a)
True
b)
False
7.
An increase in the volume of a substance when the temperature increases is called ___________________________________.
a)
kinetic energy
b)
thermal expansion
c)
temperature
d)
heat
8.
Thermal energy keeps moving away from warmer objects to cooler objects until both are the same temperature.
a)
True
b)
False
9.

When molecules slow down their movement, the ________________

a)

space between them increases making the substance contract.

b)

space between them increases making the substance expand.

c)

space between them decreases making the substance contract.

d)

space between them decreases making the substance expand.

10.

When matter cools, its molecules ________________

a)

speed up

b)

move slower

c)

become more disorganized

d)

collect the coldness from its surroundings.

11.

The expanding of matter when it is heated is known as

a)

condensation

b)

evaporation

c)

thermal expansion

d)

vaporization

12.

If the atoms of an object are moving or vibrating slow, the object would feel...

a)
Cold
b)
Hot
c)
Unknown
13.

If the atoms of an object are moving or vibrating fast, the temperature would be...

a)
Hot
b)
Cold
c)
Unknown
14.

What is Thermal Contraction

a)

A Potato

b)

A decrease in a material's volume when its temperature decreases

c)

The movement of fluids in a cycle because of convection

d)

A material through which thermal energy does not flow easily.

15.

Objects gain heat and _________. (Except for when ice melts into water)

a)

expand

b)

contract

16.
The liquid in the thermometer rises when it is placed in the hot water because ___________. 
a)

it gains heat from the hot water by conduction and expands.

b)

loses heat from the hot water by conduction and contracts. 

c)
the surrounding air is too warm. 
d)
the liquid is boiling. 
17.

Thermal expansion occurs when particles of matter move farther apart as temperature increase.

a)

True

b)

False

18.

In a hand boiler the main reason the liquid moves around is because when heat from your hand is transferred to the boiler, ___________.

a)

The liquid inside heats up and flows upwards.

b)

The gas inside expands and pushes the liquid to the other side.

c)

The solid inside melts and its liquids flows upward.

19.

When temperature decreases, distance between molecules ____________.

a)

increases

b)

decreases

c)

stays the same

20.

Expansion joints save bridges from destruction by preventing any expansion from occurring.

a)

True

b)

False

21.

When the teacher asks their students about how a hot air balloon works, they expect a very brief answer (1 sentence).

a)

True

b)

False

22.
How many kinds of heat transfer are there?
a)
1
b)
2
c)
3
d)
4 or more
23.

The type of heat transfer that happens through a substance by direct contact is ___________________.

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

24.

The kind of heat transfer that travels through space in electromagnetic waves is ______________________.

a)

Insulation

b)

Radiation

c)

Conduction

d)

Convection

25.

___________________ is the type of heat transfer that occurs in fluids (liquids and gases), such as warm air rising and cold air sinking; creating wind.

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

26.

Which statement is true?

a)

If the molecules are moving faster, the matter is colder.

b)

If the molecules are moving slower, the matter is warmer.

c)

If the molecules are moving faster, the matter is warmer.

d)

The movement of molecules don't affect temperature

27.

When you use a microwave, what is the main way that heat is transferred?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

28.

The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

29.
Which of the following is the best example of conduction?
a)
A light bulb warming a lampshade
b)
An egg cooking in a frying pan
c)
Water boiling in a pot
d)
Gases circulating in the atmosphere
30.
What kind of heat transfer happens when the sun is heating your body?
a)
Conduction
b)
Radiation
c)
Convection
d)
Density
31.
Which of the following is an example of convection?
a)
A hair dryer is drying up your hair.
b)
When the AC or heater changes the temperature.
c)
When a car engine turns hot after being turned on.
d)
When you are making soup and the water is rising and lowering.
32.

Warm air rises and the cool air sinks demonstrates this type of heat transfer.

a)

conduction

b)

convection

c)

radiation

d)

insulation

33.

Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer.

a)

conduction

b)

convection

c)

radiation

d)

insulation

34.
Ironing a shirt is an example of...
a)
condensation
b)
conduction
c)
convection
d)
radiation
35.

A group of friends gather around a fire to stay warm.

a)

conduction

b)

convection

c)

radiation

d)

insulation

36.

You get sunburned due to __________ from the sun.

a)

conduction

b)

convection

c)

radiation

d)

insulation

37.

The candle will slowly heat the metal and transfer the heat directly to the man's hand. The heat transfer from the end of the metal to the hand is ______________.

a)

conduction

b)

convection

c)

radiation

d)

insulation

38.

A chair is placed several feet from a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of

a)

conduction

b)

convection

c)

radiation

d)

insulation

39.
Which numbered part of the picture represents the way that energy from the sun reaches Earth?
a)
1
b)
2
c)
3
d)
4
40.
What happens when ice cubes melt in a glass?
a)
Heat travels from the ice to the warmer water.
b)
No energy is transferred.
c)
Heat is transferred from the warmer water to the ice cubes.
d)
The water warms up due to the humidity
41.
True or False: A thermal conductor transfers heat well between two objects, and the heat does not stay in one place.
a)
True
b)
False
42.

A winter jacket is a good example of a(n) . . .

a)

Insulator

b)

thermal conductor

c)

thermal convector

d)

radiator

43.
True or False: An insulator is a type of material that allows heat to escape from an object quickly.
a)
True
b)
False
44.

Lighter colors are known for ________ heat transfer by radiation while dark colors are known for ________ heat transfer by radiation.

a)

decreasing, increasing

b)

increasing, decreasing

c)

increasing, not affecting

d)

not affecting, decreasing

45.

___________________ is the type of heat transfer that occurs by the movement of a gas or liquid.

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

46.
Which state of matter has both definite shape and definite volume?
a)
Solid
b)
Liquid
c)
Gas
d)
All of these
47.

Which state of matter takes the shape of its container and the volume of its container?

a)

Solid

b)

Liquid

c)

Gas

d)

All of these

48.

Which state of matter takes the shape of the bottom of its container and has definite volume?

a)

Solid

b)

Liquid

c)

Gas

d)

All of these

49.

A gas has __________________. Check all that apply

a)

A lot of space between particles

b)

Particles with no definite pattern to their locations.

c)

Very little space between particles

d)

Particles that hold a very definite pattern to their locations.

e)

Particle that bounce all over the place at high speed.

50.
A solid has __________________. Check all that apply
a)
A lot of space between particles
b)
Particles with no definite pattern to their locations.
c)
Very little space between particles
d)
Particles that hold a very definite pattern to their locations.
e)
Particles that only vibrate in place
51.
A liquid has __________________. Check all that apply
a)
Particles that flow freely past each other
b)
A lot of space between particles
c)
Particles with no definite pattern to their locations.
d)
Very little space between particles
e)
Particles that hold a very definite pattern to their locations.
52.
In which state of matter do particles spread apart and fill all the space available to them?
a)
Solid
b)
Liquid
c)
Gas
d)
All of these
53.

When ________ water is placed on top of ________ water, convection will clearly be demonstrated very quickly. Choose all that apply.

a)

hot, cold

b)

cold, hot

c)

cold, cold

d)

hot, hot

54.

Compared to solids and liquids, gases have ___________

a)

more kinetic energy on average

b)

less kinetic energy on average

c)

the same amount of kinetic energy on average

d)

no kinetic energy

55.
Which state of matter is most likely depicted in the image?
a)
Solid
b)
Liquid
c)
Gas
d)
All of these
56.
Which state of matter is most likely depicted in the image?
a)
Solid
b)
Liquid
c)
Gas
d)
All of these
57.
Which state of matter is most likely depicted in the image?
a)
Solid
b)
Liquid
c)
Gas
d)
All of these
58.

When the lab or test asks you to explain a thermal energy (heat) transfer process, a very brief answer or phrase is expected.

a)

True

b)

False

59.

Lighter colors are known for _______ radiation while dark colors are known for ________ radiation.

a)

reflecting, absorbing

b)

absorbing, reflecting

c)

reversing, creating

d)

creating, reversing

60.

The graph shows the temperature of H2O in a container. When is it all liquid water?

a)

between points A and B

b)

between points B and C

c)

between points C and D

d)

between points B and E

61.

The graph shows the temperature of H2O in a container. When is it a mixture of liquid water and steam?

a)

between points D and E

b)

between points B and C

c)

between points C and D

d)

between points C and E

62.

The graph shows the temperature of H2O in a container. When is it only solid ice with no liquid water or steam?

a)

between points A and B

b)

between points B and C

c)

between points C and D

d)

between points A and C

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