Energy stores and transfers set 1

Kinetic energy store

How fast the movement of an object is

Thermal energy store

How much heat a certain object contains

Chemical energy store

Found in all food to fuel humans and the energy stored within any chemicals e.g battery, fuel

Gravitational potential energy

The higher an object is above the ground, the greater it’s gravitational potential energy

Elastic potential energy store

The energy stored within a certain object when it is stretched or compressed

Electrostatic energy

The energy stored between two electric charges

Magnetic energy store

The energy stored between two magnets

Nuclear energy store

The energy contained within a nucleus or nuclear power

What is the unit of energy?

Joules

Define the law of conservation

Energy cannot be create or destroyed only transferred from one energy store to another

Energy transfers

Mechanical- when a force moves and object

Electrical- when electrical currents moves energy

Heating-when energy moves because of a temperature difference

Radiation- when energy is transferred by waves

What is the equation to calculate efficiency?

Efficiency percentage = useful output of energy

——————————- X 100

Total output of energy

What happens to wasted energy?

It is transferred to the surroundings

Describe the energy stores and transfers in the following scenario- a car engine burns fuel to move the car forward

Chemical energy store - heating - kinetic energy store

Describe the energy stores and transfers in the following scenario- A person lifts a box onto a shelf

Chemical energy store- mechanical- GP energy store

Describe the energy stores and transfers in the following scenario- A kettle boils water

Chemical energy store- heating- thermal energy store

Describe the energy stores and transfers in the following scenario- A rollercoaster descends from the top of a hill

GP energy store- mechanical - kinetic energy store