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SCIENCE8-3RDUNIT-EXAM

Total questions: 55

Worksheet time: 37mins

Name
Class
Date
1.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
2.

What is the definition of CONVECTION?

a)

When heat transfers through waves.

b)

When heat transfers from objects that are touching.

c)

a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

d)

Heat traveling from the sun

3.

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.

4.
The baby chickens are kept warm from the heat lamps demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
5.
Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
6.
A group of friends gather around a fire to stay warm.
a)
conduction
b)
convection
c)
radiation
7.

Near the ceiling of a room the air is warmer. The warm air rises because of _________?

a)

conduction

b)

convection

c)

radiation

8.

A huge rock at the state park gets so hot during the day because of _________?

a)

conduction

b)

convection

c)

radiation

9.

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

10.

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

a)

Hotter to colder

b)

Colder to hotter

c)

Hotter to hotter

d)

Colder to colder

11.

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.

12.

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

a)

Convection

b)

Conduction

c)

Radiation

d)

insulation.

13.

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

14.

An iron is placed on your clothes to smooth out the wrinkles. The iron transfers heat to your clothes through _________?

a)

conduction

b)

convection

c)

radiation

15.

A pot is placed directly on a stove. The pot gets hot due to _________?

a)

conduction

b)

convection

c)

radiation

16.

You get sunburned due to __________ from the sun.

a)

conduction

b)

convection

c)

radiation

17.

Near the ceiling of a room the air is warmer. The warm air rises because of _________?

a)

conduction

b)

convection

c)

radiation

18.

The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?

a)

radiation

b)

conduction

c)

convection

d)

insulation

19.

Which describes what can happen as a result of radiation?

a)

A piece of wood burns in a fire.

b)

A shirt is hot after having been ironed.

c)

A can of soup is heated in a pot on a stove.

d)

A car’s inside temperature rises to over 100 degrees on a sunny day.

20.

John put a heat pack on his cold feet. What will most likely be the result?

a)

The cold from John’s feet will be radiated into the heat pack.

b)

The warmth of the heat pack will be radiated onto John’s feet.

c)

The cold from John’s feet will be conducted into the heat pack.

d)

The warmth of the heat pack will be conducted onto John’s feet.

21.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
22.
What are waves that can transfer heat through the vacuum of empty space?
a)
Electromagnetic waves
b)
Convection
c)
Conduction
d)
Heat
23.
What is a transfer of heat energy by electromagnetic waves?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
24.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
25.
What is the measurement of the average kinetic energy of a substance?
a)
Kinetic energy
b)
Temperature
c)
Thermal energy
d)
Potential energy
26.
What is a substance that does NOT conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
27.
What is a substance that DOES conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
28.
What is the total amount of kinetic energy in a substance?
a)
Potential energy
b)
Kinetic energy
c)
Thermal energy
d)
Temperature
29.
What is the transfer of kinetic energy from one substance to another?
a)
Heat
b)
Energy
c)
Thermal energy
d)
Temperature
30.
What is the energy of the movement of particles in a substance?
a)
Potential energy
b)
Kinetic energy
c)
Thermal energy
d)
Temperature
31.
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.
32.
On a hot summer day, a student dropped an ice cube onto a park bench. Within minutes, the ice cube melted. Which method of heat transfer best describes the process the student observed?
a)
radiation
b)
melting
c)
conduction
d)
convection
33.

Which best explains why a wooden spoon can be used to stir hot soup on the stove?

a)

Wood is a good conductor of heat and transfers energy to the spoon.

b)

Wood is a poor conductor of heat and transfers energy to the spoon.

c)

Wood is a good conductor of heat and does not allow the transfer of energy to the spoon.

d)

Wood is a poor conductor of heat and does not allow the transfer of energy to the spoon.

34.

Which shows an example of convection?

a)

Jose cooks an egg in a pot of boiling water.

b)

Clara burns her hand by touching a light bulb.

c)

Lucy wraps herself in an electric blanket to keep warm.

d)

Ben holds the end of a metal rod in a fire to cook hot dogs.

35.

Which is an example of radiated heat for cooking?

a)

cooking a pot of soup

b)

scrambling eggs on the stove

c)

grilling hot dogs over a campfire

d)

frying hamburgers in a frying pan

36.

Which substance will conduct the least amount of heat?

a)

glass

b)

copper

c)

plastic

d)

aluminum

37.

Which is an example of radiation?

a)

boiling a pot of noodles for dinner

b)

getting hot from lying in the sun

c)

feeling warm while taking a shower

d)

burning yourself after touching a hot plate

38.

Why does an ice cube melt when dropped into hot liquid?

a)

The liquid absorbs heat from the ice.

b)

Heat from the liquid transfers to the ice.

c)

Heat from the ice transfers to the liquid.

d)

Cold from the ice transfers into the liquid.

39.

Which is the best example of conduction?

a)

boiling a pot of water

b)

feeling heat from a fireplace

c)

a hot air balloon rising and falling

d)

touching a hot handle and getting burned

40.

Which best describes the transfer of heat due to the movement of gases and liquids?

a)

radiation

b)

convection

c)

evaporation

d)

condensation

41.

Which best explains why metal is a good material to make frying pans?

a)

Metal is a good conductor of heat and transfers heat from the stove to the food.

b)

Metal is a good conductor of heat and does not transfer heat from the stove to the food.

c)

Metal is a poor conductor of heat and transfers heat from the stove to the food.

d)

Metal is a poor conductor of heat and does not transfer heat from the stove to the food.

42.

Ice cubes are placed in a glass of water that is at room temperature. Which statement best describes the temperature of the water after 10 minutes?

a)

The temperature decreases because some of the water's heat is lost to the ice.

b)

The temperature decreases because some of the ice's heat is lost to the water.

c)

The temperature increases because some of the coolness of the water is absorbed by the ice.

d)

The temperature increases because some of the coolness of the ice is absorbed by the water.

43.
A crayon placed on a dark driveway in bright sunlight melted into a colorful puddle. What caused the crayon to melt?
a)
Solar radiation heated the driveway and then heat transferred to the crayon by conduction.
b)
Solar radiation heated the driveway and then heat transferred to the crayon by radiation.
c)
Solar convection heated the driveway and then heat transferred to the crayon by radiation.
d)
Solar convection heated the driveway and then heat transferred to the crayon by conduction.
44.
Which statement is true?
a)
The quicker a molecule moves, the colder it is.
b)
The slower a molecule moves, the warmer it is.
c)
The quicker a molecule moves, the warmer it is
d)
The movement of a molecule doesn't affect its temperature
45.
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
a)
Hotter to colder
b)
Colder to hotter
c)
Hotter to hotter
d)
Colder to colder
46.

Boiling Water

a)

Conduction

b)

Convection

c)

Radiation

47.

Curling Iron

a)

Conduction

b)

Convection

c)

Radiation

48.

Weather Patterns

a)

Conduction

b)

Convection

c)

Radiation

49.

Sun Bathing

a)

Conduction

b)

Convection

c)

Radiation

50.

Mantle

a)

Conduction

b)

Convection

c)

Radiation

51.

Feet on Hot Sand

a)

Conduction

b)

Convection

c)

Radiation

52.

Lava Lamp

a)

Conduction

b)

Convection

c)

Radiation

53.

Hot Air in a Toaster

a)

Conduction

b)

Convection

c)

Radiation

54.

Microwaving Food

a)

Conduction

b)

Convection

c)

Radiation

55.

Heat Lamps

a)

Conduction

b)

Convection

c)

Radiation

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