Science Energy & Electricity test

Question 1

anmeter

Answer 1

a device used to measure electrical charge

Question 2

amps, ampere

Answer 2

unit of current e.g the current in the bulb is 4 amps or amperes (A)

Question 3

cell

Answer 3

a store of internal energy that can be transferred as an electric current in a circuit

Question 4

conductor

Answer 4

a material which allows charge to move easily through it

Question 5

electron

Answer 5

sub atomic particle which flows in a circuit carrying a negative charge

Question 6

series circuit

Answer 6

a circuit connected in a way that the same current flows through each component in turn

Question 7

parallel circuit

Answer 7

in a parallel circuit, the current divides into two or more paths before recombining to complete the circuit

Question 8

insulator

Answer 8

a material that does not allow charge or heat to pass through it easily

Question 9

ohms

Answer 9

the unit of electrical resistance

Question 10

resistance

Answer 10

the opposition in an electrical component to the movement of electrical charge through it. resistance is measured in ohms

Question 11

potential difference

Answer 11

the potential difference (or voltage) of a supply is a measure of the energy given to the charge carries in a circuit

Question 12

volt

Answer 12

unit of voltage e.g the voltage across the lamp was 6 volts (V)

Question 13

voltmeter

Answer 13

a device used to measure potential difference or voltage

Question 14

energy transfer

Answer 14

changes from one form of energy to another form of energy

Question 15

conservation of energy

Answer 15

energy cannot be created or destroyed it can be stored, dissipated or transferred from one form into another

Question 16

internal energy

Answer 16

energy stored in all materials including energy due to the motion of particles and the forces between them

Question 17

kinetic energy

Answer 17

the energy in moving objects

Question 18

elastic potential energy

Answer 18

when an object is stretched or squashed

Question 19

gravitational potential energy

Answer 19

when an object is raised to a height

Question 20

thermal energy

Answer 20

the heat stored in a object

Question 21

work done

Answer 21

work is done when a force makes an object move a distance, energy is transferred

Question 22

power

Answer 22

the rate of work done or the energy transferred per second

Question 23

fossil fuel

Answer 23

natural, finite fuel formed from the remains of living organisms, e.g oil, coal, and natural gas

Question 24

non-renewable

Answer 24

a resource that cannot be replaced when it is used up, such as natural gas or cold

Question 25

renewable

Answer 25

an energy source that will not run out, e.g solar energy and wind energy

Question 26

chemical energy

Answer 26

when a substance undergoes a chemical reaction

Question 27

magnetic energy

Answer 27

when 2 objects attract or repel