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English Science Unit Two Energy Review - Coggle Diagram
English Science Unit Two Energy Review
Renewable and Non-renewable sources of energy
Non-renewable
Energy that cannot be easily replenished in our life time
Examples:
Coal
Natural gas
Nuclear energy
Issues
Pollution
Climate change
It is a temporary solution
Renewable
Energy sources that can be replenished by natural means.
Example:
Wave energy
Geothermal energy
Wind Energy
Issues
Not reliable
Expensive
Non efficient
Types of energy
Measuring unit: joules
Efficiency=Useful/Input×100%
Mega joules=1 million joules
Kilo joules=1000J
Heat energy
Energy that brings heat
Sun
Fire
Sound energy
Energy that makes sound
It is everywhere, everything produces sound
Light energy
A type of energy that gives out light
Light bulb
Sun
Potential energy
Gravitational energy
Energy from the core that adds up the higher you go
Climbing up the stairs
Jumping
Elastic strain energy
The energy in elastic bands
Sling shot
Chemical potential
The chemical energy in foods that gives out energy
Food
Fuel such as wood
Mechanical/electrical energy
Energy produced from mechanical movements or parts, these are created or transferred because of humans
A generator creating electrical energy
Energy changes
Energy is never lost, it is transferred
Example: The elastic potential energy from the slingshot would convert into kinetic energy.
Heat transfer
Convection
Can only occur in liquids
Caused by molecular motions
Conduction
Does not move, they only vibrate, the hotter it is, the faster it vibrates.
Only happens in solids
Radiation
No particles
Can happen anywhere
The heat is carried as a wave, and the farther it goes, heat decreases.