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Physics > Heat > Flashcards

Heat Flashcards

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1
Q

Heat

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 ta different rates due to their different molecular preperties

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5
Q

Waters

A

Begins to expand when cooled below 4 degrees

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6
Q

Conduction

A

Heat travels from particle to particle along a substance normally a solid

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7
Q

Convection

A

Heat travels through a fluid(liquid or a gas) when the particles move and carry the heat

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8
Q

Radiation

A

Heat travels from a hot object without the need for a medium,does not need a solid,liquid or gas to go through,will flow through a vacuum

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9
Q

Conductor

A

Something that allows energy to flow through it

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10
Q

Insulated

A

Is a substance that doesn’t allow heat to flow through it

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11
Q

Reducing pressure

A

Lowers the boiling water below 100° c

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12
Q

Increasing pressure

A

Raises boiling point of water above 100° c

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13
Q

Temperature

A

Is the measure of the hotness of a body and the unit is the degree Celsius

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14
Q

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

A

Latent heat

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15
Q

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

A

Latent heat of fusion

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16
Q

When heat changes a liquid to a gas without changing in temperature we call it

A

Latent heat of vaporisation

17
Q

Heat can travel by three methods

A

Conduction, convection and radiation

18
Q

Insulators are

A

Materials that are poor conductors of heat

19
Q

Radiation

A

The transfer of heat from a hot object without the need of a medium. The sun transfers its energy by radiation

20
Q

Temperature

A

A measure how hot an object it

21
Q

Temperature is measured

A

With a thermometer

22
Q

We deal with 2 types of thermometer

A

Mercury thermometer and alcohol thermometer

23
Q

The liquid in the thermometer will

A

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

24
Q

Temperature is messured

A

Between o and 100°c

25
Q

Melting point

A

Is Jan a solid turns to a liquid

26
Q

Boiling point

A

Is when a liquid turns a gas

27
Q

Freezing point

A

Is when a liquid turns to a solid

28
Q

Condensation

A

Is a gas turning to a liquid

29
Q

Latent heat

A

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

30
Q

Latent heat of fusion

A

Is used when a solid changes into a liquid

Physics (6 decks)

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