Heat Transfer Answers

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The diagram shows the movement of air as a result of convection currents.

Question illustration
A
W
B
X
C
Y
D
Z
2
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What are three properties of electromagnetic waves?

A
They travel slower than the speed of light, they include visible light waves, and they can transfer energy through empty space.
B
They need matter through which to travel, they travel at the speed of light, and they include visible light waves.
C
They travel at the speed of light, they include ultraviolet waves, and they can transfer energy through empty space.
D
They include ultraviolet waves, they need matter through which to travel, and they travel slower than the speed of light.
3

The diagram shows the movement of magma due to convection currents.

Question illustration
A
the crust
B
the mantle
C
the outer core
D
the inner core
4

Dante pours hot tea into a mug that is cool to the touch. Which best explains what will happen now?

A
The tea will get warmer because the mug acts as a thermal insulator.
B
The tea will get cooler because it gains energy from the mug.
C
The mug will get warmer because thermal energy transfers from the tea to the mug.
D
The mug will get warmer because the tea creates more thermal energy inside the mug.
5

Alex studied the image shown.He concluded that the image shows thermal energy being transferred from the flames to the person’s hands through conduction.

Question illustration
A
Thermal energy is being transferred from the person’s hands to the flames.
B
The image does not show thermal energy being transferred because the molecules of two substances or objects are not in direct contact.
C
The image does not show conduction because the molecules of two substances or objects are not in direct contact.
D
Thermal energy is being transferred from the surrounding air to the flames.
6

Which is an example of convection?

A
In a mountain forest, the sun heats up the ground.
B
On a hot day, Amaya pours water on her face to cool off.
C
At the beach, Stephan’s feet get hot walking across the sand.
D
Above the sea, warm air rises, cools, and sinks.
7

Convection can occur in which two substances?

A
wood and air
B
ice and wood
C
water and ice
D
air and water
9

Thermal energy from the Sun travels to Earth by

A
conduction.
B
charged molecules.
C
electromagnetic waves.
D
convection currents.
10

[BLANK]

A
waves
B
molecules
C
liquids
D
fluids

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