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ch-19
Question | Answer |
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The study of the moon, stars, and other objects in space. | astronomy |
An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates. | axis |
The spinning motion of a planet about its axis. | rotation |
The movement of an object around another object. | revolution |
The path of an object as it revolves around another object in space. | orbit |
The distance north or south from the equator, measured in degrees. | latitude |
The two days of the year on which the noon sun is directly overhead at either 23.5° South or 23.5° North. | solstice |
The two days of the year on which neither hemisphere is tilted toward or away from the sun. | equinox |
The day of the year that marks the beginning of spring in the Northern Hemisphere. | vernal equinox |
The day of the year that marks the beginning of fall in the Northern Hemisphere. | autumnal equinox |
One of the different shapes of the moon as seen from Earth. | phase |
The partial or total blocking of one object by another. | eclipse |
The darkest part of a shadow. | umbra |
The part of a shadow surrounding the darkest part. | penumbra |
The blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon. | lunar eclipse |
The daily rise and fall of Earth's waters on shores. | tides |
The attractive force between two objects; its magnitude depends on their masses and the distance between them. | gravity |
Any object that revolves around another object in space. | satellite |
The orbit of a satellite that revolves around Earth at the same rate that Earth rotates. | geosynchronous orbit |
A device built to study distant objects by making them appear closer. | telescope |
A bowl-shaped area that forms around a volcano's central opening; A round pit on the moon's surface. | crater |
Dark, flat regions on the moon's surface. | maria |