Energy

Question 1

What is energy?

Answer 1

Energy lets us do things in the world

Question 2

What can we do with energy

Answer 2

Store it or transfer it

Question 3

What happens when an object does work

Answer 3

The energy changes. When work is done quickly it’s high power energy and when it is done slowly its low power energy

Question 4

What is kinetic energy store

Answer 4

Energy in movement

Question 5

What is gravitational energy store

Answer 5

Energy stored by placing something up high where it can fall

Question 6

What is elastic energy store

Answer 6

Energy stored in springs

Question 7

What is thermal energy store

Answer 7

Energy stored as heat

Question 8

What is chemical energy store

Answer 8

Energy stored in chemicals e.g food or petrol

Question 9

What is nuclear energy store

Answer 9

Energy stored as atomic nuclei/ nuclear power

Question 10

What is electrostatic energy store

Answer 10

Energy stored as electric charge build up

Question 11

What is magnetic energy store

Answer 11

Energy stored by separating magnets

Question 12

What are the 4 types of energy transfers?

Answer 12

By heating, by radiation( light or sound), electrically, or mechanically (by physically pushing or pulling and applying a force

Question 13

What is the law of conservation of energy

Answer 13

Energy can’t be created or destroyed but it can only be transferred from one energy store to another

Question 14

What are the energy changes/ transfers for a rock dropping

Answer 14

Gravitational/potential energy ➡️kinetic energy

Question 15

What energy store is most appropriate for a banana

Answer 15

Chemical energy store

Question 16

What energy store is most appropriate for 2 magnets attracting each other

Answer 16

Magnetic

Question 17

What energy store is most appropriate for 2 electrically charged objects attracting each other

Answer 17

Electrostatic

Question 18

What is the equation linking energy transferred, force and distance moved

Answer 18

Energy transferred = force x distance

Question 19

Energy store of dropping and object

Answer 19

Mechanically

Question 20

Energy store in food

Answer 20

Chemical energy, when u eat food it’s metabolised and transfers the energy in food to different stores in ur body

Question 21

When is energy transferred

Answer 21

When a force moves an object

Question 22

How can u transfer something mechanically

Answer 22

When a force makes something move e.g. if an object is being pushed, pulled, stretched or squashed

Question 23

How can u transfer something electrically

Answer 23

When electric charges move around an electric circuit due to a potential difference

Question 24

How can u transfer something by light or sound

Answer 24

When light or sound waves carry energy from one place to another

Question 25

How can u transfer something by heating

Answer 25

When an object is transferred from hotter objects to colder objects

Question 26

What happens when you drop an object

Answer 26

It moves through a gravitational field: energy transfers from gravitational potential energy store to its kinetic energy store. The force of gravity makes the object move so energy is transferred mechanically

Question 27

How is energy transferred in food

Answer 27

Food has energy stored in chemical energy stores. When u eat food it is metabolised (changed by chemical processes in ur body), which transfers the energy in the food to different stores in ur body

Question 28

How is energy transferred by burning fuel

Answer 28

When you burn fuel energy is transferred from the fuels chemical energy store to the thermal energy store of the surroundings by heating

Question 29

How is energy transferred in electric circuits

Answer 29

When u turn on a battery powered fan u complete an electric circuit. Energy is transferred electrically from the chemical energy store of the battery to the kinetic store of the fan

Question 30

How is energy transferred in a stretched spring

Answer 30

A stretched spring has energy in its elastic potential energy store. When it is released energy is transferred from the springs elastic potential energy store to its kinetic energy store as it moves back to its original shape. A force is making the spring move, so it is transferred mechanically

Question 31

When is energy transferred

Answer 31

When force moves an object

Question 32

Why is energy needed

Answer 32

To supply the force that moves an object

Question 33

What happens when you push a broom

Answer 33

When u push the broom, the energy is supplied in the person pushing a broom, and is transferred to the things it has swept up