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FINAL 2:Solar System
8th Grade Earth Science FINAL 2
| Question | Answer |
|---|---|
| What two factors determine the force of gravity? | Sir Isaac Newton - mass of the two substances/objects and the distance between them. |
| What is the shape of an object’s orbit around the Sun? | ellipse |
| What is the order of the 8 main planets going away from the Sun? | Mercury, Venus, Earth, Mar, Jupiter, Saturn, Uranus, Neptune |
| What are the three rules for being considered a planet? | Must follow all three: 1. Must ONLY revolve around the Sun. 2. Must have enough mass that gravity makes it nearly spherical. 3. Must be the most gravitationally dominant object in its neighborhood (orbit). |
| Which “planet” rule do most dwarf planets not meet? | Don't follow rule #3 that "Must be the most gravitationally dominant object in its neighborhood (orbit)." |
| What is the difference between Terrestrial and Jovian planets? | Terrestrial: rocky surface, not many moons, dense and small Jovian: made mostly of hydrogen and helium, icy cores, lighter and bigger, have rings, dozens of moons |
| What is significant about the Moon’s revolutionary and rotational periods and how does it relate to the view from Earth? | The rotation and revolutionary period is the same, 27.3 days. Since both motions are the same, the same side of the Moon ALWAYS faces the Earth. |
| What two factors cause satellites to maintain their orbit around an object? | gravity & inertia counteracting each other. |
| What was the name of the NASA program that sent people to the Moon? | Apollo XI |
Created by:
*BROOKE*
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