Question 13
The appropriate answer is B. Coal is a biochemically produced sedimentary rock composed almost entirely or organic carbon formed by the compression of swamp vegetation.
Oil is an organic fluid formed by the diagenesis of buried organic material that migrates into reservoirs in porus crustal rocks such as sandstone. Natural gas is the volatile fraction of oil that seeps through cracks into reservoirs.
Question 14
The appropriate answer is A. In the operation of a generator, a source of mechanical energy such as wind, water or steam spins the turbine. The turbine moves large electromagnets encased in coils and insulated wires. As the electromagnets move, the coiled wire cuts through a magnetic field, inducing an electric current in the wire.
