Dokters tegen kanker - kanker buitenspel


Coal is formed from large plants which grew in swamps ± 275 million years ago. They died > fell into swamps, there was a lack of oxygen in the swamp which prevented bacteria growing and decomposing the dead plants. The plants formed peat > the peat became buried and was squashed by the rocks formed above. The increase in pressure squeezed the water out of the peat and warmed it. These processes slowly changed the peat into coal.

Types of energy . Energy exists in many forms, this are the main forms: Chemical energy . Chemical energy is stored in chemicals, which are made from atoms that are ...


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