Test

Question 1

Energy Stores

Answer 1

chemical (e.g. fuel + oxygen)
kinetic (in a moving object)
gravitational (due to the position of an object in a gravitational field)
elastic (e.g. in a stretched or compressed spring)
thermal (in a warm object)
magnetic (in two separated magnets that are attracting, or repelling)
electrostatic (in two separated electric charges that are attracting, or repelling)
nuclear (released through radioactive decay, fission or fusion)

Question 2

How do you measure energy in foods

Answer 2

Kilojoules and joules

Question 3

How many joules is in one gram calorie

Answer 3

1 gram calorie is equivalent to 4.186 joules

Question 4

How do you transfer chemical energy from a coal into thermal energy

Answer 4

You burn the substance, coal (a fossil fuel).

Question 5

Conservation law

Answer 5

Energy can’t disappear, only transfer

Question 6

Energy measurements

Answer 6

Energy Units and Conversions. 1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter. 1 Watt is the power from a current of 1 Ampere flowing through 1 Volt. 1 kilowatt-hour is the energy of one kilowatt power flowing for one hour.

Question 7

Non renewable

Renewable

Answer 7

Non-renewable resource if when a resource can not be used for then once to release energy. Eg coal, oil and gas.

Renewable resources can be used for then once to create energy like wind, tidal, waves, Biomass and Solar and wood.

Question 8

conservation

Answer 8

the principle by which the total value of a physical quantity or parameter (such as energy, mass, linear or angular momentum) remains constant in a system which is not subject to external influence.

Question 9

What is a simple machine

Answer 9

A simple machine makes it easier to lift things, move things and turn thing.Reduces the force that you need to do a job increase the distance that something moves when you apply a force.

Question 10

The law of convection

Answer 10

A small force that is acting on a bog distance creates a big force. The big force can only travel a small distance.If you could increase the distance as well as the force you to get more force out then you put in

Question 11

The difference between temperature and energy

Answer 11

Temperature is the same no matter what mass but energy isn’t

Question 12

What s radiation

Answer 12

Hot things like coal give out light as well as infrared radiation

Question 13

Infrared radiation

Answer 13

It is basically heat that travels in waves

Question 14

Transferring radiation

Answer 14

You don’t need particles to transfer energy by radiation. Light and infrared radiation travel through Space.

Question 15

What is a power station

Answer 15

Thermal power stations burn coal and gas.

Question 16

how electricity is generated in a power station.

Answer 16

I feel bad to heat water and produces steam steam drives a turbine which is a bit like a big fan the turbine drive the generator this provides the push that means a current flows to the kettle at home. the current transfers energy from the chemical store of the fuel to the thermal store of water in a kettle.

Question 17

What does burning fossil fuels producing pollutants

Answer 17

Sulfur dioxide, particulates and carbon dioxide

Question 18

calculate and compare the running (energy) costs of particular electrical
appliances (given the power rating and time).

Answer 18

You are charged for the number of hours that you use each appliance and for the power of your appliance.
You calculate using kilowatt or joules
KWh= 12kw x 1 hour
=12

12000j/s x 3600 s
= 43 200 000j