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seasons
| Term | Definition |
|---|---|
| axis | the cycle of summer, fall, winter, and spring due to variation in intensity of the sun and length of day caused by the tilt of the eart |
| rotation | movement in a an elliptical path around a center |
| revolution | an imaginary line drawn halfway between the northern and southern poles divides the northern and southern hemisphere |
| season cycle | the cycle of daytime and nigjht time caused by the ro tation of the earth about its axis |
| day/night cycle | half of a sphere the earth is typically diveded into the northern and southern hemisphere |
| equator | an imaginary line the extends through the earth north pole and out the south pole tilted at 23.5 |
| hemisphere | to spin on an axis |