Describe how carbon becomes locked up in sedimentary rocks.

Over millions of years the layers of sediment become squashed and form sedimentary rocks. The shells of dead marine organisms fall to the sea bed and become part of the sediment. Marine organisms used the dissolved carbon dioxide to make calcium carbonate for shells. Carbon dioxide dissolved in the oceans.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.