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Gravity and Inertia
Some words will be used more than once.
Term | Definition |
---|---|
gravity and inertia | The eight planets in our solar system orbit the Sun due to the forces of-- |
gravity | The force of attraction between the planets and the Sun. |
gravitational attraction | The strength of this depends on the mass of two objects and the distance between them |
increases, increases | Gravitational attraction between two objects ____________ as mass _______________________ |
Sun & Earth; Earth & Moon | There is a stronger gravitational attraction between the Sun and Earth than there is between the Earth and the Moon. |
decreases; increases | Also, gravitational attraction between two objects ________________as distance _________________. |
Inertia | ____________________, the first law of motion, is also an important factor in our solar system. |
motion; moving | Intertia describes an object’s tendency toward _____________. Therefore, an object in motion will keep _______________unless some force stops it. |
gravity and inertia | Both _______________and ________________govern the motion of objects in our solar system by pulling the planets toward our Sun (gravity) and keeping our planets in motion (inertia). |
inertia | Without _____________, all objects in our solar system would be much closer to the most massive object, the Sun. |