The atom is the smallest constituent unit of matter that has the properties of a chemical element and that it is not possible to divide by chemical processes. The atom is formed by a nucleus with protons and neutrons and several orbital electrons (subatomic particles); whose number varies according to the chemical element. Atoms combine to form molecules that then interact to form solids, liquids and gases.
Animals that live in any snowbound region may adapt to its environment by growing bigger feet in order to be able to walk over the deep snow. Also the animals might grow thicker fur in order to keep the animal warm while in the cold weather.
