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10A6 Unit 5 Physics > Energy flash cards > Flashcards

Energy flash cards

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1
Q

Key work

To take in energy (usually from waves).

A

ABSORB

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2
Q

Key work

Per year. The amount saved each year is called the ? savings.

A

ANNUAL

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3
Q

Key work

The best absorber of infrared radiation.

A

BLACK

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4
Q

Key work

The best emitter of infrared radiation.

A

BLACK

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5
Q

Key work

Another word for “hit together”.

A

COLLIDE

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6
Q

Key work

When a gas turns to a liquid.

A

CONDENSATION

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7
Q

Key work

Heat energy transfer that happens best in solids.

A

CONDUCTION

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8
Q

Key work

This heat energy transfer doesn?t happen very well in gases.

A

CONDUCTION

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9
Q

Key work

The opposite of expand.

A

CONTRACT

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10
Q

Key work

To get smaller.

A

CONTRACT

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11
Q

Key work

This heat energy transfer happens in liquids.

A

CONVECTION

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12
Q

Key work

This heat energy transfer happens in gases.

A

CONVECTION

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13
Q

Key work

Worked out by considering the initial money spent and all the money saves over a number of years.

A

COST EFFECTIVENESS

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14
Q

Key work

Solids have a high ?

A

DENSITY

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15
Q

Key work

Gases have a low ?

A

DENSITY

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16
Q

Key work

A hotter liquid rise because it has a lower ?

A

DENSITY

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17
Q

Key work

A colder gas sinks because it has a higher ?

A

DENSITY

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18
Q

Key work

The opposite of shiny.

A

DULL

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19
Q

Key work

Worked out by dividing the useful energy by the energy input

A

EFFICIENCY

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20
Q

Key work

To give out energy as waves.

A

EMIT

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21
Q

Key work

The opposite of absorb.

A

EMIT

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22
Q

Key work

When a liquid turns to a gas.

A

EVAPORATION

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23
Q

Key work

This process needs energy to make a gas from a liquid.

A

EVAPORATION

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24
Q

Key work

The opposite of contract.

A

EXPAND

25
Q

Key work

When most substances are heated, they ?

A

EXPAND

26
Q

Key work

These are the reason metals are excellent thermal conductors.

A

FREE ELECTRONS

27
Q

Key work

A state of matter in which the particles are widely spaced apart.

A

GAS

28
Q

Key work

Heat radiation are really ? waves.

A

INFRA-RED

29
Q

Key work

A poor conductor of heat energy is an ?

A

INSULATOR

30
Q

Key work

The amount of energy used by an electrical applicance is usually measured in ?

A

KILOWATT-HOUR

31
Q

Key work

kWh in words.

A

KILOWATT-HOUR

32
Q

Key work

Power rating in kilowatts multiplied by time used in hours gives an energy transferred in ?

A

KILOWATT-HOURS

33
Q

Key work

The scientific theory that explains the behaviour of solids, liquids and gases in terms of particles movement.

A

KINETIC THEORY

34
Q

Key work

Particles in this state of matter touch each other but can move around freely.

A

LIQUID

35
Q

Key work

The opposite to shiny.

A

MATT

36
Q

Key work

Means the same as dull.

A

MATT

37
Q

Key work

The smallest part of a substance i.e. an atom or molecule.

A

PARTICLE

38
Q

Key work

The length of time for an insulation becomes worth buying.

A

PAYBACK TIME

39
Q

Key work

Worked out by dividing the cost of an insulation by the annual savings it gives in electricity bills.

A

PAYBACK TIME

40
Q

Key work

Measured in watts or kilowatts.

A

POWER

41
Q

Key work

How quickly energy is transferred.

A

POWER

42
Q

Key work

Worked out by dividing the energy transferred by the time taken.

A

POWER

43
Q

Key work

To give out. The same as “emit”.

A

RADIATE

44
Q

Key work

A term used for how heat energy travels as waves.

A

RADIATION

45
Q

Key work

Infrared waves do this at a shiny surface.

A

REFLECT

46
Q

Key work

A way of showing the proportion of useful and wasted energies.

A

SANKEY DIAGRAM

47
Q

Key work

The opposite of dull.

A

SHINY

48
Q

Key work

A state of matter in which the particles are vibrating closely to each other and cannot move out of position.

A

SOLID

49
Q

Key work

The amount of energy need to heat a substance = the mass times the ? times the temperature rise

A

SPECIFIC HEAT CAPACITY

50
Q

Key work

Objects with a larger ? ? will cool down quicker.

A

SURFACE AREA

51
Q

Key work

This tells you the direction that heat energy will flow. From higher ? to lower ?

A

TEMPERATURE

52
Q

Key work

Another name for a kilowatt-hour.

A

UNIT

53
Q

Key work

The lower this is the better the insulation is.

A

U-VALUE

54
Q

Key work

When there are no particles in a space.

A

VACUUM

55
Q

Key work

Conduction and convection can’t happen in this. Only radiation can.

A

VACUUM

56
Q

Key work

To move about a fixed position.

A

VIBRATE

57
Q

Key work

The amount of space an object takes up.

A

VOLUME

58
Q

Key work

This gets bigger when an object expands.

A

VOLUME

10A6 Unit 5 Physics (1 decks)

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