AnswersNC-Physical Science CR 2024Unit Test

Conduction Answers

10 verified answers
1
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Alana drew diagrams to show how particles in a spoon move before and after the spoon is placed in hot liquid. Which best explains how to correct Alana’s error?

Question illustration
A
Make the particles in both diagrams larger.
B
Show more movement in the “Before” diagram.
C
Add more particles to the “After” diagram.
D
Switch the labels on the diagrams.
2
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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.
3

Which best explains why metal cooking utensils often have plastic coating on their handles?

A
Plastic melts less easily and lasts longer than metal.
B
Plastic reduces the transfer of thermal energy to hands holding the utensils.
C
Plastic molds more easily into shapes like long, thin handles.
D
Plastic increases the rate of conduction from the utensil to the food.
4

What must be true about two objects for conduction to take place?

A
The objects must be different temperatures and they must be in contact.
B
The objects must be the same temperature and they must be in contact.
C
The objects must be different temperatures and they must be insulators.
D
The objects must be the same temperature and they must be insulators.
5

How does a foam-filled winter coat help keep a person warm?

A
It slows down the transfer of thermal energy from outside to inside the coat.
B
It slows down the transfer of thermal energy from inside to outside the coat.
C
It speeds up the transfer of thermal energy from outside to inside the coat.
D
It speeds up the transfer of thermal energy from inside to outside the coat.
6

How do the metal aluminum coils in an air conditioner help keep a house cool?

A
They insulate the house from outside thermal energy.
B
They conduct thermal energy from inside the house and release it outside the house.
C
They insulate the surrounding air from indoor thermal energy.
D
They conduct thermal energy from outside the house and release it inside the house.
7

Earl is using his hands to hold a metal pan 10 centimeters above a hot burner. How can this scenario be changed to demonstrate conduction between the pan and the burner?

A
increase the temperature of the burner
B
use a glass pan instead of a metal pan
C
use foam potholders to hold the pan
D
touch the pan to the burner
8

Which demonstrates conduction?

A
a marshmallow held over a fire
B
ice cream melting in the sun
C
cool feet walking across a hot pavement
D
a bulb releasing light energy
9

Keesha conducts an experiment by pouring equal amounts of boiling water into four containers. The containers are the same size and shape, but they are made of different materials. The chart lists the containers according to their materials.Using protective gloves, Keesha carefully touches each container immediately after pouring the water. Which container was likely the hottest?

Question illustration
A
W
B
X
C
Y
D
Z
10

What occurs when someone places an ice pack on an injured ankle?

A
Conduction causes the ice pack to lose thermal energy.
B
Conduction causes the ankle to gain thermal energy.
C
Cold from the ice pack is transferred to the ankle.
D
Heat from the ankle is transferred to the ice pack.

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