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2
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The earth's surface is _______________.
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5
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The British genius who wrote about the principle of gravity was Sir Isaac _________________.
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7
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This type of satellite monitors the earth.
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9
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Another word used to describe circular.
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11
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Although not manmade, this is also a satellite.
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13
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Manmade objects that have been sent into orbit.
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14
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Supposedly it was this dropping from a tree, and striking his head, that gave Newton an idea about gravity.
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15
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Using this is possible because of satellites.
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16
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Number of satellites in the Global Positioning System
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18
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These types of satellites are used my the military.
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19
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If there weren't any gravity, we would all _______________into space.
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20
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Path of a satellite
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1
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The earth's gravitational pull on an object _________________the farther away it is from the planet's surface.
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3
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Satellites are designed to achieve this (not to fast, not too slow).
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4
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The Earth has an escape _____________________of 25,000 miles per hour.
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6
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This type of satellite sends messages
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8
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Earth's gravity makes everything fall down towards it's _________________.
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10
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When you are in a car, and need directions, this is what you use.
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12
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in addition to keeping track of the weather, satellites can also help to create these.
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17
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Closer to earth, satellites need to go __________________to stay in orbit.
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