Energy Flashcards
What are fuels?
Materials such as wood, coal, gas and oil that are burned to produce energy
Where does the stored energy in wood come from?
Light energy from the sun, carbon dioxide, water and nutrients from soil, which is stored as glucose sugar in the tree.
What are natural gas and petroleum made from?
Tiny sea organisms that sank to the bottom of the ocean where they were buried under sand and over time changed into crude oil and natural gas
What 4 things are made from crude oil?
Petrol, diesel, paraffin and candle wax
What does a fuel need to start burning?
Input energy
Oxygen
Fuel
How much of the air is oxygen?
21%
Give 3 examples of fuels we use regularly.
Coal
Oil
Parrafin
Alternative power station types?
Hydro electric power
Nuclear
Wind
Different forms of energy?
Chemical Light Heat Kinetic Electrical Sound Gravitational
When were wheels invented?
5000BC
What is a free turning axle?
An axle in a bearing that rotates with the wheel
What is a fixed axle?
The axle is fixed to the body of the vehicle and the wheel turns freely
