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15 Cards in this Set
- Front
- Back
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REVOLUTION |
the movement of an object around another object(the Earth revolves around the Sun.The moon revolved around the Earth) |
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ROTATION |
the spinning motion of a planet on its axis |
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AXIS |
the imaginary line that passes through earth's center and the North and South Poles,which Earth rotates. |
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ORBIT |
a curved path followed by a satellite as it revolves around an object. |
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INTERTIA |
the tendency of an object to resist a change in motion.Newtons first law of motion states : an object at rest will stay at rest and an object in motion shall stay in motion with a constant speed and direction unless acted on by force. |
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GRAVITY |
a force that moves rocks and other materials downhill; the force that pulls objects towards each other. |
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UMBRA |
the darkest part of a shadow. |
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PENUMBRA |
the lightest part of the shadow surrounding the darkest part. |
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ELLIPSE |
an oval shape which may be elongated or nearly circular |
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ECLIPSE |
the partial or total blocking of one object in space by another. |
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LUNAR ECLIPSE |
the blocking of sunlight to the moon that occurs when the Earth id directly between the Sun and Moon. |
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SOLAR ECLIPSE |
the blocking of sunlight to Earth that occurs when the Sun and Earth. |
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EQUATOR |
the imaginary line that wraps around the Earth at 0* latitude,half way between the north and south poles |
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EQUINOX |
the two days of the year on which neither hemisphere is tilted towards or away from the sun |
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FULL MOON |
the phase that occurs when all of the moons surface facing earth reflects light. |
