AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S2_2022Conduction

Conduction Answers

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1
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How does an increase in thermal energy affect molecules?

A
They stop moving.
B
They begin to vibrate more.
C
They decrease in temperature.
D
They lose kinetic energy.
2
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When Object 1 came into contact with Object 2, Object 2 got warmer. What can be concluded about the objects before they came into contact with each other?

A
Object 2 did not have thermal energy.
B
Object 1 had faster-moving particles.
C
Object 1 had less thermal energy.
D
Object 2 had fewer particles.
3

Conduction can occur within a single substance, but parts of the substance must have which property?

A
different temperatures
B
different textures
C
different particle sizes
D
different colors
4

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.
5

Which contains the particles that are vibrating fastest?

A
boiling water
B
frozen water
C
room-temperature water
D
cold tap water
6

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
7

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.
8

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
9

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.
10

Which explains why conduction is unlikely when ice is placed on a freezer shelf?

A
There is no direct contact.
B
The ice is too cold.
C
The shelf acts as an insulator.
D
The ice and shelf are the same temperature.

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