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rotation revolution
| Term | Definition |
|---|---|
| axis | The imaginary line through earth that extends from the north pole to the south pole and is the center of earths rotation |
| Revolution | the movement of one object around a center or another |
| Direct | in the shortest unbroken line ; temperatures are higher where the suns rays are direct |
| rotation | the spinning of earth on its axis that causes day and night to occur |
| hemisphere | half of a sphere; earth and the celestial sphere can be divided into northern and southern or eastern and western hemispheres |
| indirect | angled or spread out; temperatures are lower where the suns rays are indirect |
| tilt | the slant of earths axis, which is 23.5 degrees from vertical compared to earths orbital plane around the sun results in the north pole always pointing towards the north star |
| orbit | a curved path followed by a satellite as it revolves around and object |
| seasons | the four natural divisions of the year based on changes in temperature due to varying amounts of sunlight received (both intensity and number of daylight hours vary);caused by the tilt of earth during its revolution |
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