Conceptual Physics Ch 21 - Thermal Expansion

Thermal expansion of liquid depends on the expansion of the container that it fills. However, why does liquid overflow after heating?

• because container does not expand

• because coefficient of volume expansion for liquid is bigger than the container

• because liquid and container expand at the same amount

• because particles in solid container is more closely packed together than liquid

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NGSS.MS-PS1-4

What is Thermal expansion?

• The transfer of thermal energy between materials by the collisions of particles

• Is a decrease in a materials size when temperature decreases

• An increase in a materials size when temperature increases

• Chicken fried rice

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NGSS.MS-PS1-4

The liquid in the thermometer rises when it is placed in the hot water because ___________. 

• it gains heat from the hot water and expands.
• loses heat from the hot water and contracts. 
• the surrounding air is too warm. 
• the liquid is boiling. 

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NGSS.MS-PS1-4

What happens to air particles when they are heated?

• Particles move faster and expand
• Particles move faster and become closer together.
• Particles move slower and the air expands
• Particles move faster become further apart

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NGSS.MS-PS1-4

Why does hot air rise compared to the surrounding air?

• It is less dense.
• It is more dense.
• It has the same density.

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NGSS.MS-PS1-4

The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....

• bend downwards, complete the circuit and the alarm rings.
• bend upwards, open the circuit and the alarm will not ring.
• becomes longer, open the circuit and the alarm will not ring.

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NGSS.MS-PS1-4

NGSS.MS-PS3-3

A bimetallic strip is made up of _____________________ welded together.

• two metals of the same kind 
• two different metals that expand and contract unequally
• two different metals that expand and contract equally

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NGSS.MS-PS3-3

What is Thermal Contraction

• The movement of particles.

• A decrease in a materials volume when its temperature decreases

• The movement of fluids in a cycle because of convection

• A material through which thermal energy does not flow easily.

Tags

NGSS.MS-PS1-4

Water is densest at __

• 0°C

• 1°C

• 4°C

• 10°C

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NGSS.MS-PS1-4

Water always expands as it's heated.

• True

• False

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NGSS.MS-PS1-4