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chapter 7
| Term | Definition |
|---|---|
| geocentric | earth is at the center of the revolving plants and stars |
| heliocentric | earth and the other planets revolve around the sun |
| ellipse | is an oval shape |
| solar system | is the sun and the planets the moons and a varity of other and smaller objects |
| planet | must be round orbit the sun and have cleared out of the solar system |
| dwarf planet | is an object that orbits the sun and has enough gravity it is not a planet |
| core | the core is the middle of the earth and even as it's own boundary |
| nuclear fusion | hydron atoms join to form huliem |
| greenhouse effect | |
| gas giant | a large planet of relative low destine consting predominantly of hydrogen and hulim |
| ring | |
| asteroid belt | |
| comet | |
| asteroid | |
| meteoriod | |
| meteor | |
| meteorite |