How do forms of energy affect the formation of sedimentary rocks?
A. Motion energy of Earth's rotation causes the erosion of sediments.
B. Thermal energy absorbed by sediments causes the motion of continental plates.
C. Gravitational energy from Earth compresses buried sediments which form rock layers.
D. Radiant energy carries energy into space which increases the hardening of sediments.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.