AnswersNC-Physical Science CR 2024Unit Test

Unit Test — Unit test Answers

25 verified answers
1
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Which shows the formula for converting from degrees Celsius to degrees Fahrenheit?

A
°F = (9/5 × °C) +32
B
°F = 5/9 × (°C – 32)
C
°F = °C – 273
D
°F = °C + 273
2
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Which of these results in kinetic energy of an object?

A
position
B
motion
C
mass
D
volume
3

Which describes how radiation moves?

A
Radiation moves from a cooler object to a warmer object
B
Radiation moves from a warmer object to a cooler object
C
Radiation moves from a warm object to an object of the same temperature
D
Radiation moves from a cool object to an object of the same temperature
4

Which material most likely gets the warmest when placed in the Sun?

A
white cement
B
beige sand
C
brown mulch
D
yellow pebbles
5

In which of these can convection not occur?

A
gases
B
solids
C
liquids
D
fluids
6

The diagram shows movement of thermal energy.

Question illustration
A
W and X
B
X and Z
C
Y and Z
D
Z and W
7

A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works?

A
It removes thermal energy from the air inside the container.
B
It removes thermal energy from the frozen foods inside the container.
C
It reduces the amount of thermal energy that is transferred from inside to outside the container.
D
It reduces the amount of thermal energy that is transferred from outside to inside the container.
8

A student heats a liquid on a burner. What happens to the portion of liquid that first begins to warm?

A
It loses energy.
B
It becomes less dense.
C
It sinks downward.
D
Its molecules get closer together.
9

Which material is typically used as a thermal insulator?

A
copper
B
foam
C
ceramic
D
aluminum
10

Which best describes convection?

A
It relies on the collision of particles within or between substances.
B
It occurs in solids, liquids, or gases that are heated.
C
It results when portions of a liquid cool and rise.
D
It is driven by temperature differences within a fluid.
11

Which accurately completes the statement?Conduction involves the transfer of electric charge or ___________ due to the movement of particles.

A
thermal energy
B
light waves
C
protons
D
neutrons
12

Carmen is heating some water and trying to measure the temperature of water using a Celsius thermometer. Which measurement can she expect once the water begins to boil?

A
32°C
B
100° C
C
212°C
D
373°C
13

Evan drew a diagram to illustrate radiation.

Question illustration
A
gases mixing with particles
B
liquid moving through a vacuum
C
moving particles
D
electromagnetic waves
14

Which of these indicates that a liquid has transferred thermal energy to the air?

A
The liquid increases in temperature, and its particles lose kinetic energy.
B
The liquid decreases in temperature, and its particles gain kinetic energy.
C
The liquid increases in temperature, and its particles gain kinetic energy.
D
The liquid decreases in temperature, and its particles lose kinetic energy.
15

A thermogram taken outside a house shows high amounts of thermal energy around the windows but not around the roof.Which conclusion supports the thermogram?

A
The windows and the roof are energy efficient.
B
The windows and the roof are not energy efficient.
C
The windows are not energy efficient, but the roof is energy efficient.
D
The windows are energy efficient, but the roof is not energy efficient.
16

The diagram shows currents that form as water is heated.

Question illustration
A
the air above a wildfire
B
a carton of milk in a refrigerator
C
a snowdrift on a shady mountainside
D
a boulder in a hot desert
17

Which is an example of radiation?

A
Troy’s hand is burned when he touches hot wax.
B
Earth is heated by energy from the Sun.
C
A hot dog is held over a fire and gets warm.
D
Water is boiled in a pot on a stove burner.
18

Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

A
The average kinetic energy of the particles in the mug decreases.
B
The average kinetic energy of the particles in the coffee increases.
C
Thermal energy from the mug is transferred to the coffee.
D
Thermal energy from the coffee is transferred to the mug.
19

Which describes how fast-moving particles assist in transferring thermal energy to a cup after hot tea is poured into it?

A
They replace slow-moving particles.
B
They collide with slow-moving particles.
C
They collide with other fast-moving particles.
D
They are replaced by slow-moving particles.
20

Which contains the particles that are vibrating fastest?

A
boiling water
B
frozen water
C
room-temperature water
D
cold tap water

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