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| is an imaginary line that passes through Earth’s center and the North and South poles, about which Earth rotates. |
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| is the path of an object as it revolves around another object in space. |
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| A tide with the least difference between low and high tides . |
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| The movement of an object around another object. |
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| Occurs when the moon passes between Earth and the sun, blocking the sunlight from reaching the Earth. |
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| The spinning motion of a planet about its axis. |
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| The two days of the year on which neither hemisphere is tilted toward or away from the sun . |
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| A tide with the greatest difference between low and high tides. |
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| The study of the moon, stars and other objects in space. |
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| Is the day of the year that marks the beginning of Spring in the Northern Hemisphere. |
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| Is one of the different shapes of the moon seen from the Earth. |
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| Is the day of the year that marks the beginning of Fall in the Northern Hemisphere. |
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| The blocking of sunlight to the moon that occurs when the Earth is directly between the sun and the moon |
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| The rise and fall of the level of water in the ocean. |
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| The attractive force between two objects; its magnitude depends on their masses and the distance between them. |
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| Are the two days of the year on which the noon sun is directly overhead at either 23.5 South or 23.5 North. |
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