Answers25-26 CHEMISTRY IN THE EARTH SYSTEM S1Temperature and Heat

Heat Transfer Answers

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1
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Which condition must exist in order for conduction to occur between two substances?

A
The molecules of the substances must be touching.
B
Both substances must be the same temperature.
C
At least one substance must be a liquid.
D
Most of the molecules must be slow moving.
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

Radiation occurs when energy is transferred by electromagnetic waves.

Answer not available
4

Which two conditions must exist in order for radiation to occur?

A
the presence of a solid, liquid, or gas and a temperature difference
B
direct contact of molecules and the presence of a solid, liquid, or gas
C
the presence of electromagnetic waves and direct contact of molecules
D
a temperature difference and the presence of electromagnetic waves
5

wavesmoleculesliquidsfluids

A
waves
B
molecules
C
liquids
D
fluids
6

Substance X is placed in a container with substance Y. Both substances are fluids. Substance X initially sinks to the bottom of the container. After five minutes of being heated on a hot plate, substance X becomes less dense than substance Y.

A
Substance X will rise due to convection.
B
Substance Y will rise due to convection.
C
Substance X will rise due to radiation.
D
Substance Y will rise due to radiation.
7

The diagram shows a pot sitting on a gas stove burner.

Question illustration
A
stove burner pan bottom of pan handle top of pan handle
Option A
B
top of pan handle bottom of pan handle pan stove burner
Option B
C
pan stove burner bottom of pan handle top of pan handle
Option C
D
top of pan handle bottom of pan handle stove burner pan
Option D
8

Which is an example of radiation?

A
An ice pack is placed on a knee, and the knee cools down.
B
A rock is warmed by an ultraviolet heat lamp.
C
Hot coffee in a mug causes the mug to warm up.
D
Cold salt water sinks to the bottom of the ocean.
9

Which best describes a wave?

A
a collision of particles
B
a disturbance that carries energy
C
a movement of fluids
D
a group of electrically charged molecules
10

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.

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