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.
Built in 1961, the physical science building was part of a major campus expansion in the late 1950s and early 1960s. The science departments moved from Ayres Hall, which had also been the location of the music and speech programs, into a new complex that housed the Physical Science and the Agriculture Departments.