Contributors in Science
Science > General science 
lever
Science; General science
A simple machine made of a bar that pivots on a fixed support called the fulcrum.
Leonardo da Vinci
Science; General science
Italian scientist, inventor, and artist who had interests in a wide range of areas. He drew plans for the first parachute, and bicycle.
mechanics
Science; General science
The scientific study of the motion of objects and of how objects react to forces. Mechanics is a branch of physics.
light-year
Science; General science
The distance that light travels in a vacuum in one year. A light year is equal to about 5.88 trillion miles.
magnetic north
Science; General science
The direction from any point on the Earth toward the north magnetic pole. This is the direction to which the magnetic needle points.
magnification
Science; General science
A number that shows how many times larger an object looks than that it really is.
loran
Science; General science
A system used to determine a boat's position at sea. Loran measures the amount of time it takes for radio signals to be exchanged.
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