Energy flash cards

Question 1

Key work

To take in energy (usually from waves).

Answer 1

ABSORB

Question 2

Key work

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

Answer 2

ANNUAL

Question 3

Key work

The best absorber of infrared radiation.

Answer 3

BLACK

Question 4

Key work

The best emitter of infrared radiation.

Answer 4

BLACK

Question 5

Key work

Another word for “hit together”.

Answer 5

COLLIDE

Question 6

Key work

When a gas turns to a liquid.

Answer 6

CONDENSATION

Question 7

Key work

Heat energy transfer that happens best in solids.

Answer 7

CONDUCTION

Question 8

Key work

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

Answer 8

CONDUCTION

Question 9

Key work

The opposite of expand.

Answer 9

CONTRACT

Question 10

Key work

To get smaller.

Answer 10

CONTRACT

Question 11

Key work

This heat energy transfer happens in liquids.

Answer 11

CONVECTION

Question 12

Key work

This heat energy transfer happens in gases.

Answer 12

CONVECTION

Question 13

Key work

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

Answer 13

COST EFFECTIVENESS

Question 14

Key work

Solids have a high ?

Answer 14

DENSITY

Question 15

Key work

Gases have a low ?

Answer 15

DENSITY

Question 16

Key work

A hotter liquid rise because it has a lower ?

Answer 16

DENSITY

Question 17

Key work

A colder gas sinks because it has a higher ?

Answer 17

DENSITY

Question 18

Key work

The opposite of shiny.

Answer 18

DULL

Question 19

Key work

Worked out by dividing the useful energy by the energy input

Answer 19

EFFICIENCY

Question 20

Key work

To give out energy as waves.

Answer 20

EMIT

Question 21

Key work

The opposite of absorb.

Answer 21

EMIT

Question 22

Key work

When a liquid turns to a gas.

Answer 22

EVAPORATION

Question 23

Key work

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

Answer 23

EVAPORATION

Question 24

Key work

The opposite of contract.

Answer 24

EXPAND

Question 25

# Key work When most substances are heated, they ?

Answer 25

EXPAND

Question 26

# Key work These are the reason metals are excellent thermal conductors.

Answer 26

FREE ELECTRONS

Question 27

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

Answer 27

GAS

Question 28

# Key work Heat radiation are really ? waves.

Answer 28

INFRA-RED

Question 29

# Key work A poor conductor of heat energy is an ?

Answer 29

INSULATOR

Question 30

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

Answer 30

KILOWATT-HOUR

Question 31

# Key work kWh in words.

Answer 31

KILOWATT-HOUR

Question 32

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

Answer 32

KILOWATT-HOURS

Question 33

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

Answer 33

KINETIC THEORY

Question 34

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

Answer 34

LIQUID

Question 35

# Key work The opposite to shiny.

Answer 35

MATT

Question 36

# Key work Means the same as dull.

Answer 36

MATT

Question 37

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

Answer 37

PARTICLE

Question 38

# Key work The length of time for an insulation becomes worth buying.

Answer 38

PAYBACK TIME

Question 39

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

Answer 39

PAYBACK TIME

Question 40

# Key work Measured in watts or kilowatts.

Answer 40

POWER

Question 41

# Key work How quickly energy is transferred.

Answer 41

POWER

Question 42

# Key work Worked out by dividing the energy transferred by the time taken.

Answer 42

POWER

Question 43

# Key work To give out. The same as "emit".

Answer 43

RADIATE

Question 44

# Key work A term used for how heat energy travels as waves.

Answer 44

RADIATION

Question 45

# Key work Infrared waves do this at a shiny surface.

Answer 45

REFLECT

Question 46

# Key work A way of showing the proportion of useful and wasted energies.

Answer 46

SANKEY DIAGRAM

Question 47

# Key work The opposite of dull.

Answer 47

SHINY

Question 48

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

Answer 48

SOLID

Question 49

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

Answer 49

SPECIFIC HEAT CAPACITY

Question 50

# Key work Objects with a larger ? ? will cool down quicker.

Answer 50

SURFACE AREA

Question 51

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

Answer 51

TEMPERATURE

Question 52

# Key work Another name for a kilowatt-hour.

Answer 52

UNIT

Question 53

# Key work The lower this is the better the insulation is.

Answer 53

U-VALUE

Question 54

# Key work When there are no particles in a space.

Answer 54

VACUUM

Question 55

# Key work Conduction and convection can't happen in this. Only radiation can.

Answer 55

VACUUM

Question 56

# Key work To move about a fixed position.

Answer 56

VIBRATE

Question 57

# Key work The amount of space an object takes up.

Answer 57

VOLUME

Question 58

# Key work This gets bigger when an object expands.

Answer 58

VOLUME