A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).

If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.

Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.

A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.

Vitamins are necessary for a wide variety of bodily processes. Some vitamins like Vitamins A and C come from diet but others, like Vitamin D, are generated in response to sunlight.