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, which includes chemistry and physics, is usually thought of as the study of the nature and properties of matter and energy in non-living systems. Matter is the âstuffâ of the universe â the atoms, molecules and ions that make up all physical substances. Matter is anything that has mass and takes up space. Energy is the capacity to cause change. Energy cannot be created or destroyed; it can only be conserved and converted from one form to another.