Does the Earth stay in one place throughout the year? If not, describe its motion and location in the solar system? I NEED HELP THIS DUE I 2 HOURS

the atomic mass is the bottom number on the element.

-steel jelly

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.