(J) 1-1 Earth in Space
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| Word |
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| Definition |
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| Astronomy |
The study of the moon, stars, and other objects in space. |
| Axis |
An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates. |
| Rotation |
The spinning motion of a planet about its axis. |
| Revolution |
The movement of an object around another object. |
| Orbit |
The path of an object as it revolves around another object in space. |
| Latitude |
A measurement of distance from the equator, expressed in degrees north or south. |
| Solstice |
The two days of the year on which the noon sun is directly overhead at either 23.5 degrees South or North. |
| Equinox |
The two days of the year on which neither hemisphere is tilted toward or away from the sun. |
| Vernal Equinox |
The day of the year that marks the beginning of spring in the Northern Hemisphere. |
| Autumnal equinox |
The day of the year that marks the beginning of fall in the Northern Hemisphere. |
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