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Stack #4686905
| Question | Answer |
|---|---|
| gravity | a non contact force that pulls objects with mass toward each other |
| nuclear fusion | a reaction where to atoms combined to form a heavier atom |
| govern | to control or influence something |
| inertia | the tendency of an object in motion to resist a change in motion unless acted upon by a force |
| galaxy | huge group of stars, dust, gas, planets, and other objects bound together by gravity |
| light-year | the distance that light travels in one year, about 9.46 trillion kilometers |
| universe | all of space and everything in it |
| big bang theory | a theory that proposes that the universe formed in an instant in an enormous explosion. |
| solar system | The sun, planets, and the variety of other objects |
| sun | an averaged sized star, composed of helium and hydrogen, at the center of the solar system |
| astronimacal unit | a unit of distance equal to the mean distance from the sun to earth, or about 150 million km. |
| planet | an object that orbits the sun, has become rounded by its own gravity, and has cleared the area of its orbit. |
| moon | a natural object that orbits a planet |
| dwarf planet | an object that orbits the sun and has enough gravity to be round but has not cleared the area of its orbit |
| asteroid | a small, mostly rocky or metallic body that orbits the sun in the inner solar system |
| comet | a loose ball of ice and rock that usually has a long, narrow orbit around the sun. |
| composition | the parts or elements that make up something. |
Created by:
kimic