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.
As biology is a scientific study, it involves a lot of experimentation to make certain the results or statistics provided are accurate. Physics Science. Physics science or physical science is a science concerned with studying the natural forces or laws of the universe that direct matter, energy, space and time. There are several different types of physics that examine and study the character of the above mentioned four factors.