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Earth Science Gr7

Chapter 20

TermDefinition
orbit the path an object follows as it moves around another object
revolution the orbit of one object around another object
rotation the spin of an object around its axis
rotation axis the line on which an object rotates
solstice when Earth's rotation axis is tilted directly toward or away from the Sun
equinox when Earth's rotation axis is tilted neither toward nor away from the Sun
maria the large, dark, flat areas on the Moon
phase the portion of the Moon or a planet reflecting light as seen from Earth
waxing phase phases of the Moon during which more of the Moon's near side is lit each night
waning phase phases of the Moon during which less of the Moon's near side is lit each night
umbra the central, darker part of a shadow where light is totally blocked
penumbra the lighter part of a shadow where light is partially blocked
solar eclipse an occurrence during which the Moon's shadow appears on Earth's surface
lunar eclipse an occurrence during which the Moon moves into Earth's shadow
tide the periodic rise and fall of the ocean's surface caused by the gravitational force between Earth and the Moon, and between Earth and the Sun
Created by: carriel
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