Energy

the ability to do work Energy and work are measured in Joules (J)

kinetic, potential, chemical, nuclear, sound, light, electrical, heat

due to movement eg water flowing in a river

due to position (height) or tension (spring) eg water in a dam

stored in chemicals, fuels or food, released during a chemical reaction eg coal, oil, batteries

stored in the nucleus of an atom eg nuclear power plant

due to the vibration of an object eg loudspeaker

from the sun, heats the earth

used to generate electricity in a power station

Energy cannot be created or destroyed, it can only be changed from one form to another

one that will not be regenerated in our lifetime

coal, oil, gas easy to store, transport cause global warming by co2 emissions

uranium doesn’t emit co2 nuclear accidents contaminate environment

never be used up

hydroelectric, biomass, wave, tidal, geothermal, wind, solar

A dam stores water to make electricity no co2 can flood habitats

Fast growing plants, rotting in a sealed tank producing methane gas can get energy from waste (compost bin) land used for energy crops instead of food

Waves can create electricity no co2 machinery can be destroyed in storms

Dam the tide and make electrify No co2 Prevents ships and fish moving in some areas

Hot water from deep in the earth No co2 Expensive

Wind turbines No co2 Aesthetically bad by some ppl

Solar panels No co2 But doesn’t make energy at night

The conservation of balance in the worlds ecology indefinitely Meeting the needs of the present wo affecting the ability of future generations to meet their needs

Will run out Produce co2 global warming damage envt Acid rain kills fish and trees