Heat And Temp. Key Words Topic 4-6 Flashcards

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1
Q

Expand

Expansion

A

A substance that grows or increases in the volume. Example marshmallows heated in the microwave

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2
Q

Contraction

Contract

A

A substance that shrinks or decreases in size or volume.

Example mountain bike tires deflate during the winter

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3
Q

Heat capacity

A

The amount of heat required to warm a cooling object by 1°. Sunlight shines down equally on the sand and water. temperature the sand and water will change quite differently
Example sand

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4
Q

Particle model

A

When the temperature increases the particles are moving faster and spreading more

higher temperature equals high movement spreading out

when the temperature decreases the particles are moving slower and getting closer together

Lower temperature equals lower movement closer together

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5
Q

A pure substance is a type of ……… that is made of only one kind of particle pure substances can exist as ………, …….. or ………..

A

Matter
Solid
liquid
gas

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6
Q

Do a solid expand of the same rate?

A

Solids can be longer or shorter depending on the temperature

average energy of the particles

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7
Q

Do liquids expand and contract at the same rate?

A

When particles are heated there average energy increases needing more room so they expand.

When particles are cooling the volume decreases or contracts because the particles need less room

Example this is demonstrated by the liquid used in a thermometer as the liquid expands and contracts and moves up and down the inside tubing of the thermometer

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8
Q

What is the fourth state of matter

A

Plasma

it is made of an extreme temperatures like those on the surface of the sun 🌞

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