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15 Cards in this Set
- Front
- Back
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Astronomy |
The study of the moon, stars, and other objects in space. |
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Rotation |
The spinning motion of a planet on its axis. |
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Orbit |
The path of an object as it revolves around another object in space. |
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Solstice |
The two days of the year on which the sun reaches its greatest distance north or south of the equator. |
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Axis |
An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates. |
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Revolution |
The movement of an object around another object. |
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Calendar |
A system of organizing time that defines the beginning, length, and divisions of a year. |
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Equinox |
The two days of the year on which neither hemisphere is tilted toward or away from the sun. |
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Force |
A push or pull exerted on an object. |
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Gravity |
The attractive force between object; its strength depends on their masses and the distance between them. |
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Law of universal gravitation |
The scientific law that states that every object in the universe attracts every other object. |
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Mass |
The amount of matter in an object. |
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Weight |
The force of gravity on an object. |
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Inertia |
The tendency of an object to resist change in motion. |
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Newton's first law of motion |
The scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force. |
