Chapter 6: The Sun-Earth-Moon System

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SME System

Environmental Science

Earth Systems and Resources

AP Environmental Science

Unit 4: Earth Systems and Resources

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science

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19 Terms

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Equator

imaginary line that divides the earth into northern and southern hemispheres

<p>imaginary line that divides the earth into northern and southern hemispheres</p>
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Equinox

day when Earth's axis is not leaning toward or away from the Sun

<p>day when Earth's axis is not leaning toward or away from the Sun</p>
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orbit

The path an object follows as it moves around another object

<p>The path an object follows as it moves around another object</p>
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revolution

motion of an object around another object

<p>motion of an object around another object</p>
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Rotation

The spinning motion of a planet on its axis

<p>The spinning motion of a planet on its axis</p>
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rotation axis

the line on which an object rotates

<p>the line on which an object rotates</p>
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solstice

a day when Earth's rotation axis is the most toward or away from the Sun

<p>a day when Earth's rotation axis is the most toward or away from the Sun</p>
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maria

the large, dark, flat areas on the Moon

<p>the large, dark, flat areas on the Moon</p>
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phase

the lit part of the Moon or a planet that can be seen from Earth

<p>the lit part of the Moon or a planet that can be seen from Earth</p>
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waning phase

occurs when less of the Moon's near side is lit each night

<p>occurs when less of the Moon's near side is lit each night</p>
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waxing phase

occurs when more of the Moon's near side is lit each night

<p>occurs when more of the Moon's near side is lit each night</p>
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lunar eclipse

occurs when the Moon moves into Earth's shadow

<p>occurs when the Moon moves into Earth's shadow</p>
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penumbra

the lighter part of a shadow where light is partially blocked

<p>the lighter part of a shadow where light is partially blocked</p>
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solar eclipse

occurs when the Moon's shadow appears on Earth's surface

<p>occurs when the Moon's shadow appears on Earth's surface</p>
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tide

the daily rise and fall of sea level

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umbra

the central, darker part of a shadow where light is totally blocked

<p>the central, darker part of a shadow where light is totally blocked</p>
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neap tide

a tide just after the first or third quarters of the moon when there is the least difference between high and low water.

<p>a tide just after the first or third quarters of the moon when there is the least difference between high and low water.</p>
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spring tide

a tide just after a new or full moon, when there is the greatest difference between high and low water.

<p>a tide just after a new or full moon, when there is the greatest difference between high and low water.</p>
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gibbous moon

when the size of the illuminated portion of the moon is greater than half but not a full moon,
lasts about 6 days can be almost all white or just a little more than 1/2 white

<p>when the size of the illuminated portion of the moon is greater than half but not a full moon, <br>lasts about 6 days can be almost all white or just a little more than 1/2 white</p>