Energy

Question 1

The Law of Conservation of Energy is…

Answer 1

Energy can NEVER be created or destroyed, only transferred between stores.

Question 2

How many stores of energy are there?

Answer 2

8

Question 3

What are all the energy stores?

Answer 3

Electrical            
Chemical
Kenetic
Nuclear 
Thermal
Elastic
Gravitational
Magnetic
A way you can remember it is Every Cat Knows Not To Eat Grey Mice

Question 4

What affects the amount of kinetic energy an object has?

Answer 4

The mass of the object

How fast it is moving

Question 5

Chemical stores of energy include:

Answer 5

FUELS like methane, coal, petrol, wood etc
FOOD like rice, potatoes, sugars, & fats
BATTERIES

Question 6

Energy is measured in…

Answer 6

Joules, (J).

Question 7

How many J are in a KJ?

Answer 7

There are 1000J in a kJ.

Question 8

Temperature:

Answer 8

The AVERAGE kinetic energy of all the particles in an object.

Question 9

Thermal store of energy:

Answer 9

the TOTAL amount of kinetic energy of all the particles in an object added together.

Question 10

What are elastic objects?

Answer 10

Objects that can be DEFORMED, STRETCHED or COMPRESSED and then return to there original form.

Question 11

When does an object gain energy in its Elastic store

Answer 11

When it is DEFORMED, STRETCHED or COMPRESSED

Question 12

What is gravitational energy?

Answer 12

ENERGY stored in something that has been LIFTED in a gravitational field.

Question 13

What affects the amount of Gravitational energy an object has?

Answer 13

The mass of the object
How high it has been lifted.
How strong the gravitational field is of the planet you are on.

Question 14

What has electrostatic store of energy?

Answer 14

Objects with charged particals.

Question 15

A positive charged particle and a Positive charged particle…

Answer 15

Repel

Question 16

A negative and a negative charged particle

Answer 16

Repel

Question 17

A negative and a Positive charged particle.

Answer 17

Attract

Question 18

What is nuclear energy?

Answer 18

Energy stored inside the nucleus of an atom.

Question 19

what is Fission?

Answer 19

To split the nucleus of an atom.

Eg. power plants

Question 20

What is Fusion?

Answer 20

To combine two nuclei together.

Eg. the Sun

Question 21

magnetic field

Answer 21

magnetic field is an area around a magnet.

Question 22

name the Magnetic materials:

Answer 22

iron, nickel, cobalt and steel

Question 23

mechanical transfer

Answer 23

This is the energy transferred when a force moves an object over a distance.

Question 24

ELECTRICAL TRANSFER

Answer 24

This is the energy transferred by a moving charge through a complete circuit

Question 25

What is an Energy transfer

Answer 25

the process by which energy is moved from one store to another

Question 26

Name the 4 energy transfers

Answer 26

``` Radiation Heat Electrical mechanical You can Remeber this by Rats Hate Every Mouse. ```

Question 27

RADIATION TRANSFER

Answer 27

Radiation is the transfer of energy in the form of WAVES. | They usually spread out from a SOURCE.

Question 28

Name as many waves as you can

Answer 28

``` Light waves Sound waves Water waves Radio waves Microwaves Infrared waves Ultraviolet waves X-Rays Gama rays ```

Question 29

HEAT TRANSFER

Answer 29

Anything with a THERMAL STORE of energy will gradually lose this store if the surroundings are colder:

Question 30

CONDUCTION

Answer 30

CONDUCTION happens mainly in SOLIDS. Hot particles bump into their neighbours, passing along some of their THERMAL STORE.

Question 31

CONVECTION

Answer 31

CONVECTION happens in FLUIDS (Liquids and Gases). Hot fluids rise upwards and cold fluids fall downwards.

Question 32

INFRARED RADIATION

Answer 32

INFRARED RADIATION is a special case of a RADIATION transfer. Infrared waves are felt as HEAT, and anything with a temperature automatically gives out infrared waves.

Question 33

WHAT IS AN ENERGY FLOW DIAGRAM?

Answer 33

transfers can be represented using an energy flow diagram

Question 34

In a flow diagram Boxes represent...

Answer 34

stores of energy

Question 35

In a flow diagram Arrows represent...

Answer 35

energy transfers