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.
â¢ Examples of physical sciences are physics, chemistry, math, geology, oceanography etc while examples of biological sciences are biology, botany, zoology, microbiology, genetics etc. Related posts: 1  Difference Between Science and Technology. 2  Difference between Bachelor of Arts (BA) and Bachelor of Science (BSc).