1. | Who calculated that the earth and the sun, but were too small |
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2. | the plotemic system was.. |
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3. | who discovered earth was a planet |
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4. | Who proposed the model of the solar system with the sun at the center |
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5. | Who made most of mars obervations, plus were more precise then before |
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6. | Who spent 20 years plotting the planets |
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7. | Who discovered the three laws of planetary motion, plus had a strong mathematical mind |
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8. | True or false: the orbit of mars and other planets are ellipses, not circles |
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9. | As mars moves away from the sun it...and when it moves toward the sun it.... |
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10. | Keplers 2nd law of planetary motion states: |
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11. | Keplers third law states that the square length of time it takes a planet to orbit the sun is proportional to the cube of its mean distance from the... |
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12. | And AU is NOT equal to... |
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13. | Galileos most important contributions were... |
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14. | Who first used a telescope |
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15. | What did galileo NOT discover... |
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16. | True or false: the moon surface is smooth |
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17. | What is a sunspot, who discovered it? |
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18. | Who created the law of universal gravitation |
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19. | True or false: a moving object will continue to move at a constant speed and in a straight line with gravity is called inertia |
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20. | According to........, every body in the universe attracts every other body with a force that is directly proportional to their masses and inversely proportional to the square of the distance between their mass ( law of gravitation) |
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21. | The greater the mass of the object.... |
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22. | The force of gravity acting upon an object is... |
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