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Astronomy Book Vocabulary
Chapter 1/Section 3
9
Astronomy
8th Grade
06/13/2005

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Term
phase
Definition
one of the different apparent shapes of the moon as seen from Earth
Term
eclipse
Definition
the partial or total blocking of one object in space by another
Term
solar eclipse
Definition
the blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth
Term
umbra
Definition
the darkest part of a shadow
Term
penumbra
Definition
the part of a shadow surrounding the darkest part
Term
lunar eclipse
Definition
the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
Term
tide
Definition

the periodic rise and fall of the level of

water in the ocean

Term
spring tide
Definition
the tide with the greatest difference between consecutive low and high tides
Term
neap tide
Definition
the tide with the least difference between consecutive low and high tides
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