AnswersFL-2003310-Physical Science CRLab: Thermal Energy Transfer

Lab: Thermal Energy Transfer — Unit test Answers

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1
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Which indicates that thermal energy is no longer being transferred from boiling water to a mug?

A
The mug and the water lose all thermal energy.
B
The water is hotter than the mug.
C
The mug is hotter than the water.
D
The water and the mug are the same temperature.
2
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At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C?

7
77°F
9
95°F
2
280K
3
300K
3

Jin listed some common thermal insulators and conductors in a chart.Which belongs in the area marked with an X?

Question illustration
A
iron
B
foam
C
wood
D
glass
4

Which condition must be met for conduction to occur?

A
particles must be large
B
particles must be small
C
particles must be in contact
D
particles must be spread apart
5

Which of these prevents conduction from occurring?

A
equal masses
B
different masses
C
equal temperatures
D
different temperatures
6

Which occurs when a warm fluid cools down?

A
Energy is released to the environment.
B
Energy is absorbed from the environment.
C
The density of the fluid decreases.
D
The mass of the fluid decreases.
7

Which of these prevents conduction from occurring?

A
equal masses
B
different masses
C
equal temperatures
D
different temperatures
8

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

w
water vapor, ice, water
i
ice, water, water vapor
w
water, water vapor, ice
w
water vapor, water, ice
10

At the coast on a summer day, the land is hotter than the ocean. Warm air over the land rises and is replaced by cooler air, causing a sea breeze. At night, the land cools quickly and the ocean is now warmer than the land. What will happen next?

Question illustration
A
Winds will stop blowing as the convection current ceases to flow.
B
The convection current will reverse direction, reversing the winds.
C
Winds will increase as the two convection currents overlap.
D
The convection current will move seaward, reversing the winds.
11

Which is equal to a temperature of 20°C?

2
20°F
6
68°F
3
36°F
3
32°F
12

Which type of energy is transferred by convection currents?

A
chemical
B
thermal
C
potential
D
electrical
13

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

°
°C = (9/5 × K) +32
°
°C = 5/9 × (K – 32)
°
°C = K – 273
°
°C = K + 273
14

Which of these actions would increase heat transfer between two objects?

e
establishing their thermal equilibrium
i
increasing the area of their contact
u
using objects with similar specific heats
r
reducing the time of their contact
15

What causes the air above a pot of boiling water to become warm?

A
The air transfers thermal energy to the water vapor.
B
The water vapor transfers thermal energy to the air.
C
The particles in the air lose kinetic energy.
D
The particles in the water vapor gain kinetic energy.
16

Which is the correct order of materials in terms of reflectivity, from least to greatest?

A
brown soil, beige sand, white paper, black asphalt
B
white paper, beige sand, brown soil, black asphalt
C
black asphalt, brown soil, beige sand, white paper
D
beige sand, white paper, black asphalt, brown soil
17

What causes the air above a pot of boiling water to become warm?

A
The air transfers thermal energy to the water vapor.
B
The water vapor transfers thermal energy to the air.
C
The particles in the air lose kinetic energy.
D
The particles in the water vapor gain kinetic energy.
18

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.
19

Four students are carrying out different laboratory procedures.Piroja is mixing baking soda and vinegar to see if it reacts.Jason is heating salt water over a burner until the water evaporates.Kali is putting crushed ice and ice cubes on a table to see which melts first.Francisco is separating iron filings from sand using a magnet.

A
Piroja’s experiment
B
Jason’s experiment
C
Kali’s experiment
D
Francisco’s experiment
20

Allison drew a diagram to illustrate radiation.

Question illustration
A
X: MatterY: Empty space
B
X: Large massY: Small mass
C
X: HotY: Cold
D
X: EarthY: Sun
21

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?

t
the milk
t
the spoon
t
the oatmeal
t
the surrounding air

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