What is Newton's First Law of Motion? F = MA

Every action has an equal and opposite reaction

Friction

An object at rest stays at rest, an object in motion stays in motion.

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist