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Type: Multiple-Choice
Category: Planetary Motion
Level: Grade 9
Score: 1
Author: djgoddard
Last Modified: 2 years ago

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Planetary Motion Question

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Grade 9 Planetary Motion

Earth is kept in orbit around the Sun by                                     .
  1. its speed and distance from the Sun
  2. inertia and gravity
  3. its shape and size
  4. electricity and magnetism
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