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orbit | the path taken by an object revolving around another |
sphere | a round,three-dimensional
object |
axis | imaginary vertical line around which earth spins |
rotation | spinning of the earth on its axis |
revolution | earths yearly orbit around the sun |
ellipse | an elongated,closed curve |
solstice | is the day when the sun reaches its greatest distance north or south of the equator |
equinox | occurs when the sun is directly above earth's equator |
mantle | portion of the interior of a planet or moon lying between the crust and the core |
moon phase | are different forms that the moon takes in its appearance from earth |
new moon | when the moon is between the earth and the sun |
waning | less of the illuminated half of the moon |
full moon | occurs when all of the moon's surface is facing earth reflecting light |
solar eclipse | occurs when the moon moves between the sun & the earth & cast its shadow over part of earth |
maria | flat regions |
lunar eclipse | when earth's shadow falls on the moon |
comet | space object orbiting the sun formed from dust and rock particles mixed with frozen water,methane,& ammonia |
impact basin | depression left behind by an object striking the moon |
waxing | more of the illuminated half of the moon |