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Definition
| the spinning of Earth on its axis, causing day and night to occur |
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As the moon continues to move around the earth, the visible part of the moon decreases
-the moon seems to be getting smaller. |
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When less than half of the lighted half of the moon can be seen from Earth.
Waxing crest- 1st phase
Waning crescent - 7th phase -occurs just before a new moon |
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| Occurs when the moon is between the Earth and Sun. The lighted half of the moon is facing the Sun. We do not see any of the lighted half of the moon on Earth. |
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When more than half of the lighted side of the moon can be seen from Earth.
-waxing gibbous- 3rd phase
-waning gibbuous-begins just after a full moon |
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| imaginary line around which the Earth spins |
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| When the Sun is directly above the equator, and the length of day and night is about equal (12 hours day and 12 hours night)all over the world. The Earth is NOT TILTED away or toward the Sun. Occurs March 21 or 22 and September 21 or 22. |
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After a new moon, the part of the moon that is VISIBLE increases.
Occurs when the moon seems to be growing larger. |
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the motion of a body, such as a planet or moon along a path around some point in space
The Earth's yearly orbit - 365.23 days = 1 year |
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Occurs during a new moon. The Earth moves into the Moon's shadow. The Moon blocks sunlight from reaching the Earth.
-the moon passes between the earth and sun |
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| When all of the lighted side of the moon can be seen from Earth. The Earth is between the Sun and the Moon. |
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| The 23.5 degree angle the Earth forms. |
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| When the Sun, Earth, and Moon line up so that the full Moon moves into the Earth's shadow. Sunlight is blocked from reaching the moon. |
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| dark-colored, flat plain regions on the moon |
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| round depressions on the moon's surface; constantly being formed by meteorites,asteroids and comets hitting the surface |
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| New moon, waxing crescent, first quarter,waxing gibbous,full moon, waning gibbous, last quarter, waning crescent |
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| the study of the moon, stars, and other objects in space |
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| the moon, sun and the planets known at the time of the Greeks, orbited Earth |
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Definition
| Earth and other planets orbit the sun |
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| is the apparent westward drift of a planet resulting from the combination of the motion of Earth and the planet's own motion around the sun |
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| a measurement of the average distance between the planets and the Sun |
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| Law of Universal Gravitation |
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Definition
| the scientific law that states that every object in the universe attracts every other object |
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| the slight movement over a period of 26,000 years of Earth's axis |
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| the place in the orbit of a planet where the planet is farthest from the sun |
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| the place in the orbit of a planet where the planet is closest to the sun |
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| the moon is closet to Earth |
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| the moon is fartest from Earth |
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| the different shapes of the moo as seen from Earth |
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| bright elongated streaks or splash marks that radiate outward |
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| channels that look like valleys; may be the remmants of ancient lava flow |
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| soil-like layer of gray debris from the bombardment of meteorites |
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