MID YEAR - Types of energy transfer

Question 1

What is conduction?

Answer 1

Conduction is the transfer of heat through a material without the movement of the material itself.

Question 2

True or False: Conduction occurs in fluids.

Answer 2

False

Question 3

Fill in the blank: The primary mechanism of heat transfer in solids is __________.

Answer 3

conduction

Question 4

What is an example of conduction?

Answer 4

An example of conduction is a metal spoon getting hot when placed in a pot of boiling water.

Question 5

What is convection?

Answer 5

Convection is the transfer of heat by the movement of fluids (liquids or gases).

Question 6

True or False: Convection can occur in solids.

Answer 6

False

Question 7

Fill in the blank: In convection, heat is transferred by the movement of __________.

Answer 7

fluids

Question 8

What is an example of convection?

Answer 8

An example of convection is the rising of warm air in a room, which heats the air above it.

Question 9

What is radiation?

Answer 9

Radiation is the transfer of energy through electromagnetic waves.

Question 10

True or False: Radiation requires a medium to transfer energy.

Answer 10

False

Question 11

Fill in the blank: The transfer of heat from the sun to the Earth occurs through __________.

Answer 11

radiation

Question 12

What is an example of radiation?

Answer 12

An example of radiation is feeling warmth from a campfire without being in direct contact with it.

Question 13

Which type of energy transfer is most effective in a vacuum?

Answer 13

Radiation

Question 14

Multiple choice: Which type of energy transfer involves the movement of particles? A) Conduction B) Convection C) Both A and B D) None

Answer 14

C) Both A and B

Question 15

What property of materials affects their ability to conduct heat?

Answer 15

Thermal conductivity

Question 16

Fill in the blank: The __________ is a common example of convection currents in nature.

Answer 16

ocean

Question 17

True or False: All materials conduct heat equally well.

Answer 17

False

Question 18

What happens to air when it is heated in a convection process?

Answer 18

It becomes less dense and rises.

Question 19

Multiple choice: Which of the following is a poor conductor of heat? A) Metal B) Wood C) Water D) Air

Answer 19

B) Wood

Question 20

What is the primary factor that drives convection currents?

Answer 20

Temperature differences

Question 21

Fill in the blank: The transfer of heat through radiation does not require __________.

Answer 21

a medium

Question 22

What is the primary method of heat transfer in a boiling pot of water?

Answer 22

Convection

Question 23

True or False: Insulators are materials that conduct heat well.

Answer 23

False

Question 24

What is the role of the atmosphere in heat transfer?

Answer 24

The atmosphere facilitates convection and also allows for radiation from the sun.

Question 25

Multiple choice: Which type of energy transfer is primarily responsible for heating the Earth’s surface? A) Conduction B) Convection C) Radiation D) All of the above

Answer 25

C) Radiation

Question 26

What is the term for the process of heat transfer through direct contact?

Answer 26

Conduction

Question 27

Fill in the blank: __________ is responsible for the warming of the atmosphere due to the sun's rays.

Answer 27

Radiation

Question 28

What type of energy transfer occurs when you boil water in a kettle?

Answer 28

Both convection and conduction

Question 29

True or False: Heat always transfers from a cooler object to a warmer object.

Answer 29

False

Question 30

What is thermal equilibrium?

Answer 30

Thermal equilibrium is the state in which two objects in contact do not exchange heat, as they are at the same temperature.

Question 31

What type of energy transfer is primarily used in heating systems that rely on air circulation?

Answer 31

Convection

Question 32

Multiple choice: Which of the following best describes conduction? A) Heat transfer through air B) Heat transfer through direct contact C) Heat transfer through electromagnetic waves D) None of the above

Answer 32

B) Heat transfer through direct contact

Question 33

Fill in the blank: The process by which warm air rises and cool air sinks is known as __________.

Answer 33

convection

Question 34

What is the main difference between conduction and convection?

Answer 34

Conduction occurs in solids, while convection occurs in fluids.

Question 35

True or False: Radiation can travel through a vacuum.

Answer 35

True