P1.1 Changes In Energy Stores
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Give 5 examples of energy stores
• Chemical • Kinetic • Gravitational potential • Elastic potential • Thermal
Give some examples of chemical energy stores
Fuels, foods, chemical found in batteries
How is chemical energy transferred?
In chemical reactions
What does a kinetic energy store describe?
The energy an object has because it is moving
What does the gravitational potential energy store describe?
The energy stored in an object at height
What are some examples of kinetic energy?
Runners, buses, comets
What are some examples of gravitational potential energy stores?
Aeroplanes, kite, mugs on a table
What does elastic potential energy describe?
The energy stored when an object is stretched or squashed.
What are some examples of elastic potential energy?
Drawn catapults, compressed springs, inflated balloons.
What does thermal energy describe?
The energy a substance has because of its temperature
True or false: energy can be transferred from one store to another
True
How can we show energy transfer?
By using energy transfer diagrams
What is the law of the conservation of energy?
Energy cannot be created or destroyed
What is chemical energy?
The energy stores in chemical bonds, such as those between molecules
What are some examples of thermal energy stores?
Human bodies, hot coffee, stoves, ice Ice particles vibreate more slowly but they still have thermal energy
Describe the energy transfers that happen in a kettle
The current in the kettle’s heating element transfers energy to the thermal energy store of the water and the kettle, so the kettle warms up and the water starts to boil