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Vocab

The science vocab need to know

TermDefinition
Rotation - the spin of an object in space ( Note: Period of rotation is the amount of time it takes for an object to make one complete rotation.)
Revolution – the elliptical motion of a around another object.) as it travels around another more massive body in space (Note: Period of revolution is the amount of time it takes for one object to revolve
Orbit – the elliptical PATH an object takes in space while revolving around another object
Gravity -attracting force due to mass or rotation
Atmospherre – mixture of gases that surrounds a planet
Sun – a medium sized star; the center of our solar system
Planet – body that orbit around the sun or a star and does not produce its own light
Terrestrial Planet – a small, dense, rocky planet similar to Earth (Inner planets)
Gas Planet – a large, gaseous planet of the outer solar system with no known solid surface (Outer planets)
Natural Satellite – smaller body that orbits around a larger body
Artificial Satellite – any human made object placed in orbit around a body in space
Comet – a small body of ice, rock, and cosmic dust loosely packed together
Asteroid – a small, rocky body that revolves around the sun
Meteoroid - a very small, rocky body found in space HINT: mini asteroid
Meteorite - a meteoroid that reaches Earth’s surface without burning up completely HINT: It 16. meteorite – a meteoroid that reaches Earth’s surface without burning up completely HINT: It
Meteor – a bright streak of light caused when a meteoroid or comet dust burns up in the atmosphere NOTE: Many people call this a “shooting star”, but it is not)
Thrust – the force that accelerates a rocket
Orbital Velocity – the speed and direction a rocket must have in order to orbit Earth
Escape Velocity – the speed and direction a rocket must have in order to completely break away from a planet’s gravitational pull
Centripetal Force – the force that causes an object to follow a curved path
Moon – a natural satellite of a planet (Note: satellites are natural or artificial bodies that revolve around more massive bodies such as planets)
Created by: steven03
 

 



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