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Planetary Science
Vocab
| Term | Definition |
|---|---|
| lunar eclipse | A full moon, when Earth is exactly between the Moon and the Sun, and Moon passes through Earth's shadow |
| solar eclipse | A new moon, when the Moon passes exactly between Earth and the Sun |
| Maria | the dark places on the Moon's surface which are cooled magma |
| rilles | the white lines on the moon that look similar to riverbeds or canyons |
| waning | getting smaller or decreasing |
| waxing | getting bigger or increasing |
| rotation | the spinning motion of something around an axis |
| revolution | to move around another item in a circular orbit |
| ray | white lines on the moon that extend away from craters |
| crater | a feature on the moon caused by impact and appears to have raised sides |
| equator | an imaginary line that goes around the mid-line of Earth that's marked as 0 degrees latitude |
| gravity | the force of attraction between masses |
| inertia | the force that keeps objects in motion |
| radius | the distance from the middle to the edge of a circle |
| diameter | the distance across a circle that crosses through the mid-point |
| gibbous | the moon shape that is larger than the first and third quarters but smaller than the full moon. It is like the words "fat" or "bulging." |
| highlands | the light colored areas on the moon |
| equinox | a day of the year when the Sun's rays are mostly equal on the two hemispheres (March and September) |
| solstice | a day of the year when the Earth is tilted all the way toward or away from the Sun (June and December) |
| orbit | the path an object takes to move around another object |
Created by:
lynnetterisk
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