Grade 8 Science Terms Already Passed

Tides {Ans: the alternate rising and falling of the sea level, usually twice in each day. This is due to the gravitational pull of the moon and sun}Unit of Force, Newton {Ans: the SI unit of force. Mass times acceleration = force}Binoculars {Ans: an optical instrument with a lens for each eye, used for viewing distant objects}Meteor {Ans: a rock from outer space that enters the earth's atmosphere, and glows very hot as it passes rapidly through the gases. It looks to us like a "shooting star"}Meterorites {Ans: a meteor that survives passing through the earth's atmosphere and strikes the ground.}Subscript {Ans: a symbol printed below a line}Vacuum {Ans: a space entirely devoid of matter including air. outer space is a vacuum.}Conductive {Ans: having the ability to pass heat or energy through it. Example: metal wires conduct electricity}Radiation {Ans: the movement of energy by electromagnetic waves}Expansion {Ans: the action of becoming larger}Water cycle {Ans: the continuous cycle of how water circulates between the earth's oceans, atmosphere, and land. Water falls from the clouds as precipitation (like rain and snow) then drains into streams and rivers. Sunlight causes water to