Force is applied to change an object's speed or direction of motion.

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

Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.

Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.

The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.