AnswersFall 24 GSE Physical Science B ICHeat

Heat — Unit test Answers

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Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temperature spoon. Which substance will have heat flow from it to the other substances?

A
the milk
B
the spoon
C
the oatmeal
D
the surrounding air
2
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Which of these actions would increase heat transfer between two objects?

A
establishing their thermal equilibrium
B
increasing the area of their contact
C
using objects with similar specific heats
D
reducing the time of their contact
3

Which is equal to a temperature of 20°C?

A
20°F
B
68°F
C
36°F
D
32°F
4

Which statement describes one way that wind energy is different from energy from fossil fuels?

A
Wind energy reliability can be inconsistent.
B
Wind energy produces larger quantities of energy.
C
Wind energy can be reproduced quickly.
D
Wind energy produces more pollution.
5

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)

A
3.9 m
B
4.0 m
C
39.2 m
D
40.0 m
6

Hedea made a study chart about nuclear energy.Which best describes the error in Hedea’s chart?

Question illustration
A
The nuclei of atoms are split apart in both fission and fusion.
B
The nuclei of atoms are joined together in both fission and fusion.
C
Fission converts nuclear energy to electrical energy, not thermal energy.
D
Fission and fusion convert nuclear energy to both radiant and thermal energy.
7

Which statement best describes heat and thermal energy?

A
They are different words for the same thing.
B
They represent different concepts.
C
Heat is what happens when thermal energy stops moving between substances.
D
Thermal energy is what happens when heat moves between substances.
8

Which best describes a difference between energy transformations in power plants and dams?

A
Only power plants use fossil fuels to transform energy.
B
Only dams use fission to generate thermal energy.
C
Only power plants use water to turn turbines.
D
Only dams use mechanical energy to produce electricity.
9

Which resource is renewable?

A
coal
B
oil
C
steel
D
wind
10

At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C?

A
77°F
B
95°F
C
280K
D
300K
11

Two examples of energy transformations are shown.

Question illustration
A
begin with chemical energy.
B
begin with electrical energy.
C
result in radiant energy.
D
result in mechanical energy.
12

What is the overall energy transformation in a coal-fired power plant?

A
electrical to chemical
B
chemical to electrical
C
nuclear to radiant
D
radiant to nuclear
13

Which shows the temperatures of three substances, in order, from greatest to least?

A
water vapor, ice, water
B
ice, water, water vapor
C
water, water vapor, ice
D
water vapor, water, ice
14

Which shows the formula for converting from kelvins to degrees Celsius?

A
°C = (9/5 × K) +32
B
°C = 5/9 × (K – 32)
C
°C = K – 273
D
°C = K + 273
15

The total energy in a system is 675 J. The kinetic energy changes from 296 J to 432 J. Which statement best describes the potential energy of this system?

A
It changes from 296 J to 432 J.
B
It changes from 379 J to 243 J.
C
It changes from 432 J to 296 J.
D
It changes from 243 J to 379 J.

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