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yr 7 revision

three topics

TermDefinition
planet a celestial body moving in an elliptical orbit round a star.
gravity the force that attracts a body towards the center of the earth, or towards any other physical body having mass.
friction the action of one surface or object rubbing against another.
static electricity a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.
telescope an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses
microscope an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells
cell wall protective structure that surrounds a plant cell.
cell the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.
Hubble telescope a telescope launched into orbit around the earth in 1990 to provide information about the universe in the visible, infrared, and ultraviolet ranges
voyager 1 space probe launched by NASA on September 5, 1977. Part of the Voyager program to study the outer Solar System,
Created by: tom arthur