Energy
저자: Marina Rushdy
1. Conservation low of energy
1.1. enrgy cannot be created or destroyed but change from one form to another
2. Enerygy chain
2.1. starts from sun
2.2. generate electricty
2.3. devices work
3. Resoources
3.1. Renewable
3.1.1. Take short time to be renewwd
3.1.2. sun
3.1.2.1. solar cells
3.1.3. water
3.1.3.1. water mill
3.1.4. wind
3.1.4.1. wind mill
3.2. non - renwable
3.2.1. need millions of year to be formed
3.2.2. coal
3.2.3. oil
3.2.4. natural gas
4. fuel
4.1. bio fuel
4.1.1. living organisms
4.1.2. wood
4.1.3. charcoal
4.2. fossiel fuel
4.2.1. Dead organisms
4.2.2. need milion of years
4.2.3. coal
4.2.4. oil
4.2.5. natural gas