click below
click below
Normal Size Small Size show me how
Seasons
Why do we have seasons?
| Term | Definition |
|---|---|
| Rotation | The spin of an object around its axis |
| Rotation axis | The line on which an object rotates |
| Orbit | The path object follows as it moves around another object |
| Revolution | The orbit of one object around another object so |
| Solstice | When earths rotation axis is tilted directly toward or away from the sun |
| Phase | The lit part neither of the Moon or a planet that can be seen from Earth |
| Waxing phase | Phases of the Moon during which more of the Moons near side is lit each night |
| Waning phase | Phases of the Moon during which or less of the Moons near side is lit each night |
| Umbra | The central, darker part of a shadow where light is totally blocked |
| Penumbra | The lighter part of a shadow where light is partially blocked |
| Solar eclipse | An occurrence during which the Moon’s shadow appears on Earths surface |