K-O

Life Cycle

The series of stages in form and functional activity through which an organism passes between successive recurrences of a primary stage.

Light

An electromagnetic radiation in the wavelength range including infrared, visible, ultraviolet and x-ray and traveling in a vacuum with a speed of about 186,281 miles (300,000 kilometers) per second; specifically the part of this range that is visible to the human eye.

Liquid

A fluid (such as water) that has no independent shape but has a definite volume and does not expand indefinitely and that is slightly compressible.

Machine

A device with fixed and moving parts that modifies mechanical energy in order to do work.

Magnetism

A class of physical phenomena that include the attraction for iron observed in lodestone and a magnet, are inseperably associated with moving electricity, are exhibited by both magnets and electric currents, and are characterized by fields of force.

Manufacturing

The process of making a raw material into a finished product; especially in large quantities.

Material

The tangible substance (chemical, biological, or mixed) that goes into the makeup of a physical object. One of the basic resources used in a technological system.

Medium

A substance regarded as the means of transportation of a force or effect.

Metamorphosis

A marked and usually abrupt developmental change in the form or structure of an animal (as a butterfly or frog) occurring subsequent to birth or hatching.

Mineral

A solid homogeneous crystalline chemical element or compound that results from the inorganic processes of nature.

Natural Material

Material found in nature, such as wood, stone, gases and clay.

Orbit

A path described by one body in its revolution about another (as by the earth about the sun or by an electron about a nucleus).

Organism

An individual life form, such as a plant, animal, bacterium, protist, or fungus; a body made up of organs, organelles, or other parts that work together to carry out the various processes of life.