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9 Cards in this Set
- Front
- Back
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Rotation
The spin of a body on its axis |
Season
A division on of the year that is characterized by recurring weather conditions, and determined by both Earth's tilt relative to the Sun and Earth's position it's orbit around the Sun |
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Day
The required time for Earth to rotate once on Earth's axis |
Equinox
The moment when the Sun appears to cross the celestial equator |
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Revolution
The motion of a body that travels around another body in space |
Solstice
The point at which the Sun is as far north or as far south of the equator as possible |
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Year
The time required for the Earth to orbit once around the sun |
Satellite
A natural or artificial body that revolves around a planet |
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Eclipse
An event in which the shadow of one celestial body falls on another |
Gravity
A force of attraction between two objects due to their masses |
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Umbra
A shadow that blocks sunlight, such as the conical section in the shadow of Earth or the moon |
Lunar Phases
The different appearances of the moon from Earth throughout the month |
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Penumbra
The outer part of the shadow such as the shadow cast by Earth or the moon in which sunlight is only partially blocked |
Tide
The periodic rise and fall of the water level in the oceans and other large bodies of water |
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Spring Tide
A tide of increased range that occurs two times a month, at a new moon and a full moon |
Tidal Range
The difference in levels of ocean water at high tide and low tide |
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Neap Tide
A tide of minimum range that occurs during the first and third quarter of the moon |
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