Which statement identifies a characteristic of a scientific theory?
it’s a subjective
it’s a proven fact
it’s based on a opinion
it may change over time

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

give me abc and i will get it for u.

d

explanation:

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.