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KB science test 2
Ch 6 science test - part 2 KB
Question | Answer |
---|---|
solar system | the sun and the objects traveling around it |
planets | NINE in the our solar system |
orbit | a path of a planet around the sun |
third | the number planet Earth is from the sun |
year | 365 days - the time it takes Earth to revolve around the sun |
gravity | force of attraction between the Sun and Earth |
mass & distance | the two measurements that gravity depends on |
stronger | (strength of gravity) is determined by how close two objects are |
universal | what Newton's ideas were called to describe gravity and its relationship to objects |
Sun's gravity | how the planets are kept on their orbit |
inertia | the tendency of an object to keep moving in a straight line |
gravity + inertia | what keeps planets in their orbits |