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Convection, Conduction and Radiation

Total questions: 127

Worksheet time: 1hrs 13mins

Name
Class
Date
1.
Which best describes the process of convection?
a)
Convection is the primary way  heat travels  through rays.
b)
Convection is the primary way heat travels  through metals.
c)
Convection is the primary way heat travels  through appliances.
d)
Convection is the primary way heat travels  through liquids and gasses.
2.
How is heat transferred when boiling a pot of water on the stove?
a)
conduction
b)
convection
c)
combustion
d)
radiation
3.
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
4.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
5.

Which of the following is not a method for heat transfer

a)

Radiation

b)

Insulation

c)

Conduction

d)

Convection

6.

In which of the following state are the particles closest together?

a)

Fluid

b)

Gas

c)

Liquid

d)

Solid

7.

How does heat energy reach the Earth from the Sun

a)

Convection

b)

Radiation

c)

Conduction

d)

Insulation

8.
Which of the following is needed for convection to happen?
a)
Fluid/s
b)
Light in the form or rays
c)
Electromagnetic waves
d)
Fire
9.
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.
10.
How many kinds of heat transfer are there?
a)
1
b)
2
c)
3
d)
4 or more
11.
The transfer of heat by currents through liquids of gases is called
a)
Perspiration
b)
Radiation
c)
Conduction
d)
Convection
12.
Radiation= 
a)
physical contact
b)
warm air rising
c)
heat moving through empty space
d)
say what?
13.

The transfer of energy by waves or particles is called

a)

conduction

b)

convection

c)

radiation

d)

insulation

14.

A material that reduces the flow of heat is a(n)

a)

conductor

b)

insulator

c)

metal

d)

radiator

15.

All of the following are good conductors of heat EXCEPT

a)

Copper

b)

Iron

c)

Plastic

d)

Aluminum

16.

Density is...

a)

how many particles there are

b)

how heavy the particles are

c)

how much space the particles take up

d)

how close together the particles are to each other

e)

how big the particles are

17.

Hot particles...

a)

are more dense and rise

b)

are less dense

and rise

c)

are less dense

and sink

d)

are more dense and rise

18.

The movement of particles in a circle due to differences in density is called...

a)

radiation

b)

conduction

c)

convection

d)

currents

19.

The best place to put a furnace is...

a)

in the basement because heat rises

b)

in the basement because heat sinks

c)

on the top floor because heat rises

d)

on the top floor because heat sinks

20.

Convection happens in...

a)

solids

b)

liquids

c)

gases

d)

fluids

e)

all of the above

21.

Cold air is _____ because the particles have_____

a)

more dense;

more energy

b)

more dense;

less energy

c)

less dense;

less energy

d)

less dense;

more energy

22.

If there is a fire and you need to get out of a smoky room, the best way to get out is:

a)

jumping as high as possible to get above the fire

b)

crawling along the floor because the hot smoke will rise to the ceiling

23.

More dense particles are:

a)

heavier

b)

bigger

c)

farther apart

d)

closer together

24.

Transferring heat through the movement of

hot and cold particles to new physical locations is called____

a)

radiation

b)

convection

c)

conveyor

d)

conduction

25.

Convection will stop when____:

a)

the temperatures are very different

b)

the temperatures are a little different

c)

the temperatures are the same

d)

convection never stops

26.

Heat is also known as .....

a)

thermal energy

b)

power

c)

gravitational potential energy

d)

elastic potential energy

27.

Thermal energy is transferred from ________ temperature to _____________ temperature.

a)

lower, higher

b)

higher, lower

c)

same, same

d)

higher, higher

28.

Which of the following is NOT a means of thermal energy transfer?

a)

conduction

b)

boiling

c)

radiation

d)

convection

29.

If a material conducts heat well, it is known as a _______

a)

conductor

b)

insulator

c)

generator

d)

incubator

30.

In conduction, when one part of the object is heated, the particles ________

a)

vibrate more vigorously, collide with adjacent particles and transfer energy

b)

vibrate more slowly and transfer energy

c)

expand due to the heat and allow the hotness to flow.

d)

flow from one of the object to other.

31.

When the objects in contact are in __________________, there is no heat transfer.

a)

thermal equilibrium

b)

stable equilibrium

c)

unstable equilibrium

d)

neutral equilibrium

32.

Metals are better conductors because they have the following mechanisms of conduction:

a)

molecular vibration

b)

free electron diffusion

c)

molecular vibration & free electron diffusion

33.

In a liquid, the main method of thermal energy transfer is ....

a)

conduction

b)

convection

c)

radiation

34.

Conduction is a process through which thermal energy is transferred ________.

a)

through the collisions of adjacent particles

b)

through electromagnetic radiation

c)

through movement of the medium

35.

Convection is a process through which thermal energy is transferred ________.

a)

through the collisions of adjacent particles

b)

through electromagnetic radiation

c)

through movement of the medium

36.

Radiation is a process through which thermal energy is transferred ________.

a)

through the collisions of adjacent particles

b)

through electromagnetic radiation

c)

through movement of the medium

37.

When heated, warmer fluids _________.

a)

increase volume, become less dense and rise.

b)

decrease volume, become more dense and sink.

c)

don't change.

38.

When cooled, fluids _________.

a)

increase volume, become less dense and rise.

b)

decrease volume, become more dense and sink.

c)

don't change.

39.

Where should air-con be placed to ensure maximum cooling effect for a room?

a)

on the floor

b)

near the ceiling

c)

at eye level

d)

at waist level

40.

Where should a heating element be placed to ensure maximum heating of a kettle?

a)

at the base of the kettle

b)

at the sides of the kettle

c)

at the top of the kettle

41.

How does heat move?

a)

In many directions

b)

from warm places to cooler places

c)

from cold places to warm places

d)

Both B and C

42.
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
43.

What type of thermal energy transfer is number 1 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

44.

What type of thermal energy transfer is number 2 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

45.

What type of thermal energy transfer is number 3 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

46.

Food cooking in a pan on a stove

a)

Conduction

b)

Convection

c)

Radiation

47.

How does heat energy reach the Earth from the Sun

a)

Convection

b)

Radiation

c)

Conduction

d)

Insulation

48.
a)

Conduction

b)

Convection

c)

Radiation

49.
a)

Conduction

b)

Convection

c)

Radiation

50.
The way the heat is moving from the hot coffee is called...
a)
convection
b)
radiation
c)
insulation
d)
conduction
51.

Which of the following is not a method for heat transfer

a)

Radiation

b)

Insulation

c)

Conduction

d)

Convection

52.
a)

Conduction

b)

Convection

c)

Radiation

53.
a)

Conduction

b)

Convection

c)

Radiation

54.
a)

Conduction

b)

Convection

c)

Radiation

55.
a)

Conduction

b)

Convection

c)

Radiation

56.

Warm air rises and the cool air sinks

a)
conduction
b)
convection
c)
radiation
57.
a)

Conduction

b)

Convection

c)

Radiation

58.
a)

Conduction

b)

Convection

c)

Radiation

59.

EQ: What are the methods of thermal energy transformation?

What is conduction?

<- (Example)

a)

heat or electricity is directly transmitted through a substance

b)

use energy electromagnetc (waves sun)

c)

have tempratures warms/high temperatures

d)

all are correct

60.

What is truth about radiation energy?

(chose one)

<- (Example of waves of sun)

a)

requiers direct

touch

b)

have temperatures

warms

c)

only ocucurs in solds

d)

use rays or electromagnectic

waves (sun)

61.

Which of these is Covection?

<- (example)

a)

is warm and dennse

b)

use electromagnetic waves

c)

only occurs in solds

d)

does not requiers matter or air

62.

What kind of heat transfer is occurring when the sun warms the sand?

a)

Conduction

b)

Convection

c)

Radiation

d)

Density

63.

Which of the following is an example of convection?

a)

A hair dryer is drying up your hair.

b)

Boiling spaghetti noodles in water

c)

When a car engine turns hot after being turned on.

d)

When the AC or heater changes the temperature

64.

What heat transfer happens when you burn your finger by touching a fire?

a)

Convection

b)

Radiation

c)

Conduction

d)

Gravity

65.

When a frying pan is touching a stove that is on, what heat transfer is happening?

a)

Radiation

b)

Conduction

c)

density

d)

Convection

66.

Hot air balloons rise because the heated air is less dense than cold air, so as the warm rises as the molecules spread out. The cold air is pushed downward, where it is also heated and rises. This swirling movement of  air is called...

a)

convection

b)

radiation

c)

insulation

d)

conduction

67.

The baby chickens kept warm from a heat lamps demonstrates this type of heat transfer. 

a)

conduction

b)

radiation

c)

convection

d)

density

68.

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

a)

conduction

b)

radiation

c)

convection

d)

Insolation

69.

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

a)

conduction

b)

radiation

c)

convection

d)

insolation

70.

 

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

What type or energy is?

a)

conduction

b)

radiation

c)

convection

d)

waves

(sun)

71.

Transfer of thermal energy through "space" how is it's call?

a)

conduction

b)

convection

c)

radiation

d)

density

72.

Transfer of thermal or heat energy through "touch"

a)

conduction

b)

convection

c)

radiation

d)

waves

(sun)

73.

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

a)

conduction

b)

radiation

c)

convection

d)

gravity

74.

Which describes what can happen as a result of radiation?

<- (Exaple on the left)

a)

a piece of woood burns in a fire

b)

a shirt is hot after having been ironed🔥

c)

a can of sup is heated in a pot on a stove

d)

a car's inside temerature rises to over 100 degrees on a sunny day ☀️🌡️

75.

The type of heat transfer that creates currents in water is called ________.

a)

conduction

b)

radiation

c)

convection

d)

density

76.

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

<- Photo of example

a)

conduction

b)

radiaton

c)

convection

d)

gravity

77.

The transfer of electrical waves or particles is called?

a)

conduction

b)

radiation

c)

radiation

d)

insolation

78.

 

How is heat transferred when boiling a pot of water on the stove?

<- ( example of a photo)

a)

conduction

b)

convection

c)

radiation

d)

gravity

79.
Which direction is heat flowing in the picture?
a)
from the hand to the ice
b)
from the ice to the hand
c)
heat is not being transferred
d)
there is no way to tell
80.

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

a)

conduction

b)

convection

c)

radiation

81.

Heat transfer by convection is caused by differences in what two things:

a)

Thickness and material

b)

Weight and electricity

c)

Temperature and density

82.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
83.

Can convection currents occur in a solid?

a)

No.

just in a liquid and gas.

b)

Yes.

In a solid, liquid, and gas.

84.

What is an example of a convection current?

a)

Touching a hot spoon that was in a soup bowl.

b)

Feeling the suns rays on a nice summer day.

c)

Touching an iron skillet after cooking and feeling the heat.

d)

Movement of gas in a hot air balloon.

85.

What is the relation between convection heat transfer coefficients of natural convection and forced convection?

a)

convection heat transfer coefficient of natural convection is lower than the convection heat transfer coefficient of forced convection

b)

convection heat transfer coefficient of natural convection is more than the convection heat transfer coefficient of forced convection

c)

convection heat transfer coefficients in both natural and forced convection are the same for same system

d)

unpredictable

86.

What is the ratio of the buoyancy force to the viscous force acting on a fluid called? (answer Grashof number)

a)

Prandtl number (Pr)

b)

Reynolds number (Re)

c)

Nusselt number (Nu)

d)

Grashof number (Gr)

87.

In natural convection, the Nusselt number (Nu) depends on (answer is Gr and Pr)

a)

Pr and Re

b)

Gr and Re

c)

Gr and Pr

d)

none of the above

88.
During convection, more dense currents _________ and less dense currents _________.
a)
sink, rise
b)
rise, sink
89.

The average energy of motion of an object’s particles.

a)

Heat

b)

Thermal Energy

c)

Convection

d)

Radiation

90.

While on vacation, Carine rides in a hot-air balloon. To make the balloon rise, the pilot turns on a flame to warm the air inside the balloon. How does the air change?

a)

The temperature of the air decreases.

b)

The air particles move closer together.

c)

The motion of the air particles increases.

d)

The air changes to a different state of matter.

91.

Thermal energy being transferred from one place to another.

a)

Radiation

b)

Convection

c)

Heat

d)

Conduction

92.

•The movement of heat or electricity through matter by direct contact is called_________.

a)

convection

b)

radiation

c)

thermal heat

d)

conduction

93.

Which of the following answer choices IS NOT an example of conduction?

a)

Touching a metal spoon in a cup of hot liquid

b)

Holding a chocolate bar in your hand then it starts to melt

c)

•Hot air rising in the atmosphere, cold sinking

d)

Putting a heating pad on your back

94.

Which of the following describes the transfer of thermal energy that occurs as a piece of ice in her hand?

a)

Thermal energy is transferred from her hand to the ice cube.

b)

Thermal energy is transferred from the ice cube to her hand.

c)

Thermal energy is transferred back and forth from her hand to the ice cube

d)

Thermal energy does not transfer between to objects at different temperatures.

95.

•The transfer of thermal energy though a fluid (gas or liquid) is called_________.

a)

convection

b)

conduction

c)

radiation

d)

thermal radiation

96.

Which of the following answer choices accurately describes thermal transfer conduction?

a)

The transfer of heat through solids, liquids, or gases

b)

The transfer of thermal heat through liquids or gases.

c)

The transfer of heat through touching(mostly metals) solids in particular.

d)

The transfer of heat through open space or waves.

97.

Which type of thermal energy transfer is represented in the picture?

a)

radiation

b)

temperature

c)

conduction

d)

convection

98.

Which of the following answer choices is NOT an example of thermal transfer convection?

a)

Lava lamp rising and sinking

b)

Hot air balloon ride elevating for take off

c)

Hot water rising in the oceans, cold sinking

d)

Feeling the warmth from a fireplace

99.

As a spoon in a bowl of hot soup becomes warmer, by which process is energy being transferred to the spoon?

a)

convection

b)

conduction

c)

radiation

d)

direct contact

100.

What type of heat transfer is shown in the picture?

a)

heat option

b)

radiation

c)

conduction

d)

convection

101.

What is the rolling motion of boiling water an example of?

a)

convection

b)

conduction

c)

insulation

d)

radiation

102.

What is transfer of heat through a material(solids) is called?

a)

thermal insulation

b)

thermal conduction

c)

thermal radiation

d)

thermal convection

103.

Hot air is seen rising from the pavement on a hot summer day. Which of the following is this an example of?

a)

thermal conduction

b)

thermal insulation

c)

convection

d)

radiation

104.

Energy transmitted in waves or a stream of particles or travels through open space is called_____.

a)

direction convection

b)

conduction

c)

convection

d)

radiation

105.

What type of heat transfer is denoted in the picture?

a)

conduction

b)

convection

c)

radiation

d)

none of the above

106.

What type of heat transfer is in this picture?

a)

electromagnetic

b)

convection

c)

Thermal energy

d)

conduction

107.

Which of the following is the transfer of energy as heat by the movement of a liquid or gas?

a)

radiation

b)

emission

c)

convection

d)

conduction

108.

Which of the following answer choices IS NOT an example of radiation?

a)

Placing a hand on top of a basket of hot rolls

b)

•Holding your hand over a burning match without touching it

c)

Holding your hands over a light bulb

d)

Laying out in the sun at a beach

109.

What type of heat transfer is occurring in the picture?

a)

conduction

b)

convection

c)

heat transfer

d)

radiation

110.

A cold block of metal is placed in contact with a warm block of metal. Which type of energy will be transferred between the blocks?

a)

thermal energy

b)

chemical energy

c)

electrical energy

d)

mechanical energy

111.

The circular motion occurring in the mantle is the result of _______.

a)

convection currents

b)

radiation

c)

conduction contact

d)

lithosphere

112.

What type of thermal transfer is show in the photo?

a)

conduction

b)

radiation

c)

convection

d)

thermal picture

113.

What type of heat transfer is occurring in the picture?

a)

Convection

b)

Conduction

c)

Radiation

d)

Heat

114.

Which of the following is NOT an example of radiation?

a)

Warm and cold air circulating in the living room

b)

Laying out in the sun on the beach

c)

Feeling the warmth from a fireplace in the winter

d)

Microwaving food for lunch at work

115.

What type of heat transfer is on display in the photo?

a)

convection

b)

conduction

c)

heat

d)

radiation

116.

How does heat move?

a)

In many directions

b)

from warm places to cooler places

c)

from cold places to warm places

d)

Both B and C

117.

What type of thermal energy transfer is number 1 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

118.

What type of thermal energy transfer is number 2 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

119.

How does heat energy reach the Earth from the Sun

a)

Convection

b)

Radiation

c)

Conduction

d)

Insulation

120.

Which of the following is not a method for heat transfer

a)

Radiation

b)

Insulation

c)

Conduction

d)

Convection

121.

Warm air rises and the cool air sinks

a)
conduction
b)
convection
c)
radiation
122.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
123.

This is a form of energy that causes materials to become warmer or hotter.

a)

Temperature

b)

Heat

c)

Thermometer

124.

This measures how hot or how cold a material is

a)

Temperature

b)

Heat

c)

Thermometer

125.

Which of the following statements is true?

a)

The faster the particles move, the lower the temperature.

b)

The faster the particles move, the higher the temperature.

c)

The slower the particles move, the higher the temperature.

126.

This is an instrument that measures temperature

a)

Thermometer

b)

Heat

c)

Temperature

127.

Emerson places a beaker of water on a hotplate and turns the hotplate on. The temperature in the room is 25 ºC. After the water heats to 75 ºC, she adds pieces of ice to the beaker.


Which of the following describes a transfer of heat energy that occurs during this experiment?

a)

from the air to the water

b)

from the ice to the beaker

c)

from the water to the ice

d)

from the water to the hotplate

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