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science vocabulary
space vocaubulary
| Question | Answer |
|---|---|
| . 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 body 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 around another object.) |
| . orbit | the elliptical PATH an object takes in space while revolving around another object |
| . gravity | attracting force due to mass or rotation |
| . atmosphere | – 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 giant | 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 |
| . moon | a natural satellite of a planet (Note: satellites are natural or artificial bodies that revolve around more massive bodies such as planets) |
| . 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 takes the “right” path to Earth |
| 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 |
| 9. 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 |
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