Energy Stores
Energy Resources
Equations
Energy Transfers
Key Words
100
What is the main energy store in moving objects?
Kinetic
100
Name a non-renewable energy resource.
Coal
Oil
Gas
Nuclear
100
What is size of the gravitational field strength on Earth?
10N/kg
100
How is energy transferred to a light bulb?
Eelectricity
100
What are the units for energy?
Joules
200
What is the main energy store in a rollercoaster at the top of a hill?
gravitational potential
200
Name two renewable energy resources
Solar Wind
Hydroelectric Tidal
Wave Geothermal
Bio-fuel
200
What is the equation for calculating gravitational potential energy?
GPE = mass x gravity x height
GPE = mgh
200
What is the useful energy transfer from a light bulb?
Light
200
What word do we use to describe something that keeps heat in?
insulator
300
What is the main energy store in hot objects?
Thermal
300
Give one disadvantage of relying on solar power for electricity.
It only works when it is sunny, it's not sunny every day.
Not sunny at night time.
300
What is the equation for calculating kinetic energy?
KE = 1/2 x mass x velocity2
KE = 0.5mv2
300
What is the wasted energy transfer from a light bulb
Heating
300
What do we call one of these diagrams? 
Sankey diagram
400
What is the main energy store in a wound up clockwork toy?
Elastic
400
What do we call something that is being used up much more quickly than it is being produced?
non-renewable
400
What is the equation for calculating efficiency?
Efficiency = useful energy รท total energy supplied
400
Describe the energy transfers when a ball is dropped from 2m in the air.
(at least 3 energy stores must be named)
Gravitational potential energy
to kinetic energy as it falls
to elastic as it hits the ground
400
What word do we use to describe how good something is at transferring energy?
Efficiency
500
What is the main energy store in a solar cell?
chemical
500
What are the main disadvantages of a hydroelectric power station.
You have to flood a valley, which could mean loss of homes, loss of habitats for plants and animals
500
A 1500kg car is moving at 10m/s. Calculate its kinetic energy.
You must include the units
= 0.5 x 1500 x 102
= 75,000J
500
Describe the energy transfers involved when a person is swinging on a swing.
You must include any wasted energy in your description.
GPE when the swing is at its highest, which transfers to kinetic energy as it moves down.
This transfers back to GPE as the swing rises up again.
Some energy is lost as it is transferred by heating to the surroundings
500
What word(s) do we use to describe how good something is at conducting heat?
Thermal Conductivity