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Physics > Heat > Flashcards

Heat Flashcards

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1
Q

Heat

A

Is a form of energy

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2
Q

Solids, liquids and gases expand

A

When heated

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3
Q

Solids, liquids and gases contract

A

When cooled

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4
Q

Bimetallic strip

A

The different metals will expand and contract at different rates due to their different molecular properties

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5
Q

Water

A

Begins to expand when cooled below 4 degrees Celsius

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6
Q

Reducing pressure

A

Lowers the boiling point of water below 100 degrees

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7
Q

Increasing pressure

A

Raises the boiling pressure of water above 100 degrees

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8
Q

Temperature

A

Is the measure of a hotness of a body and the unit is the degrees Celsius (C)

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9
Q

When heat causes a change in state and not a change in temperature we call it

A

Latent heat

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10
Q

When heat changes a solid to a liquid with no temperature change we call it

A

Latent heat of fusion

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11
Q

When heat changes a liquid to a gas with no change in temperature we call it

A

Latent heat of vaporisation

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12
Q

Heat can travel by three methods

A

Conduction, convection and radiation

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13
Q

Insulators are

A

Materials that are poor conductors of heat

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14
Q

Radiation

A

The transfer of heat from a hot object without the need of a medium.

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15
Q

Temperature

A

A measure how hot an object is

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16
Q

Temperature is measured

A

With a thermometer

17
Q

We deal with 2 types of thermometer

A

A mercury thermometer and alcohol thermometer

18
Q

The liquid in the thermometer will

A

Expand and rise when heated and will contract and fall when cooled

19
Q

Temperature is measured

A

Between 0 and 100 degrees Celsius

20
Q

Melting point

A

Is when a solid turns to a liquid

21
Q

Boiling point

A

Is when a liquid turns to a gas

22
Q

Freezing point

A

Is when a liquid turns to a solid

23
Q

Condensation

A

Is a gas turning to a liquid

24
Q

Latent heat

A

The heat taken in or given out when a substance is changing state without a change in temperature

25
Q

Latent heat of fusion

A

Is used when a solid changes into a liquid

26
Q

Latent heat of vaporisation

A

Is used when a liquid changes to a gas

Physics (7 decks)

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