Once food has reached the sea floor, currents carry this food and organisms filter it without having to use their own energy to go and get food. Another way organisms use energy is by coming out at night and rising to feed on upper-level organisms.
Physical Science redirects here. It is not to be confused with Physics. Physical science is a branch of natural science that studies non-living systems, in contrast to life science. It in turn has many branches, each referred to as a physical science, together called the physical sciences.
Physical science can be defined as the study of matter and energy. Matter refers to all the âstuffâ that exists in the universe. Energy is what gives matter the ability to move and change. Physical science can be divided into chemistry and physics. 1  Chemistry focuses on matter and energy at the scale of atoms and molecules. 2  It is the study of the structure, properties, and interactions of matter.