An atom has 8 protons , 8 neutrons , and 8 electrons. what is the charge of the atom?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

Which is one example of a phenotypic change that is not genetic

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?