Energy & Matter

Question 1

Equation to find out how much energy has been transferred

Answer 1

Energy transferred = Force * Distance

Question 2

Four main ways you can transfer energy

Answer 2

1. Mechanically
2. By heating
3. By light and sound
4. Electrically

Question 3

Seven stores of energy

Answer 3

1. Thermal energy store
2. Gravitational potential energy store
3. Magnetic energy store
4. Kinetic energy store
5. Chemical energy store
6. Elastic potential energy store
7. Electrostatic energy store

Question 4

Conduction

Answer 4

Transfer of thermal energy , by the vibration of particles.

Question 5

Radiation

Answer 5

Energy that comes from a source and travels through space at the speed of light

Question 6

2 principles of the conservation of energy

Answer 6

1. Energy can’t be created or destroyed - - it’s only ever transferred from one store to another
2. Energy is only useful when it’s transferred from one store to another

Question 7

Equation for total energy input

Answer 7

Total energy input = the useful energy + the wasted energy

Question 8

Energy transfer diagram

Question 9

Renewable

Question 10

Non renewable

Question 11

2 equations for energy transferred

Answer 11

1. Energy transferred ( joules ) = Power ( Watts ) * Time ( Seconds )
2. Energy transferred ( Kilowatts - hour ) = Power ( Kilowatts ) * Time ( hour )

Question 12

Electricity meters

Answer 12

Record the amount of energy transferred in kWh ( kilowatts - hours )

Question 13

Equation for calculating the cost of electricity

Answer 13

COST = Energy transferred ( kWh ) * PRICE per kWh

Question 14

Power rating of an appliance

Answer 14

The energy that it transfers per second when it’s operating at its recommended maximum power

Question 15

Sublimation

Answer 15

The conversion of a substance from a solid to a gas directly without it becoming a liquid

Question 16

Energy source

Answer 16

Something with stored energy that can be released in a useful way

Question 17

Particle

Answer 17

Very tiny object , too small to be seen with a microscope

Question 18

Particle model

Answer 18

A way to think about how substances behave in terms of small moving particles

Question 19

Thermal conductor

Answer 19

A material that allows heat to move through it quickly

Question 20

Thermal insulator

Answer 20

A material that only allows heat to travel slowly though it

Question 21

Temperature

Answer 21

A measure of the motion and energy of the particles

Question 22

Thermal energy

Answer 22

Quantity of energy stored in a substance due to the vibration of its particles

Question 23

Convection

Answer 23

Transfer of thermal energy , when particles in a heated fluid rise

Question 24

Infrared radiation

Answer 24

Transfer of thermal energy as a wave