click below
click below
Normal Size Small Size show me how
Seasons
Why we have seasons
| Term | Definition |
|---|---|
| Rotation | The spinning of an object |
| Rotation axis | The line on which an object rotates |
| Orbit | The path an object follows as it moves around another orbit |
| Revolution | The orbit of one object around another object |
| Solstice | When earths rotation axis is tilted directly toward or away from the sun |
| Equinox | When earths rotation axis is tilted neither toward nor away from the sun |
| Waxing phase | Phases of the moon during which less of the moon near side is lit each night |
| Waning phase | Phases of the moon during which less of the moon near side is lit each night |
| Umbra | The central darker part of a shadow were light is totally blocked |
| Penumbra | The lighter part of a shadow were light is totally blocked |
| Solar eclipse | On occurrence curing which the moon’s shadow appears on earths surface |