In mathematical induction, showing that something works for the first case, or that P1 is true. angle of depression. The angle formed by a horizontal line and an observer's line of sight to an object below. angle of elevation. The angle formed by a horizontal line and an observer's line of sight to an object above.
Plankton's voice is provided by American actor Mr. Lawrence. The voice Lawrence uses for Plankton originated as an imitation of one of his deep-voiced friends from high school. On television, he first used the voice for incidental characters on Rocko's Modern Life.
Plankton is the collective name for certain organisms (mostly microscopic) that drift in the oceans, lakes, rivers, and other bodies of water. Plankton have a tremendous importance in the web of life on earth. The name plankton is derived from the Greek word planktos, meaning wanderer or drifter..