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seasons
| Term | Definition |
|---|---|
| axis | An imaginary line that extends through the earths north and south pole, tilted at 23.5 |
| rotation | to spin on an axis |
| revolution | Movement in an elliptical path around a center |
| season cycle | 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 earth |
| day/night cycle | The cycle of daytime and nighttime caused by the rotation of the earth around its axis |
| equator | An imaginary line drawn between the northern and southern poles, divides the northern and southern hemispheres |
| hemisphere | half of a sphere, the earth is typically divided into the northern and southern hemisphere, |