DEFINITION: continental slope: the steep descent of the seabed from the continental shelf to the abyssal zone.

DEFENATION: Of, on, or relating to the earth: "terrestrial ecosystems

A substance capable of causing cancer in living tissue.

(of a reaction or process) Accompanied by the release of heat. (of a compound) Formed from its constituent elements with a net release of heat.

conservation of mass: a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system.

The material or protoplasm within a living cell, excluding the nucleus.

The process of gathering data to test the accuracy, or otherwise, of a scientific model

A short, microscopic, hairlike vibrating structure. Cilia occur in large numbers on the surface of certain cells, either causing... An eyelash.

A widespread occurrence of an infectious disease in a community at a particular time: "a flu epidemic