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Level B-Earth, Moon, & Sun 3rd grade

AB
ASTRONOMYThe study of the moon, stars, and the objects in space.
AXISAn imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates.
ROTATIONThe spinning motion of a planet about its axis.
REVOLUTIONThe movement of an object around another object.
ORBITThe path of an object as it revolves around another object in space.
SOLSTICEThe two days of the year on which the noon sun is directly overhead at either 23.5° South or 23.5° North.
EQUINOXThe two days of the year on which neither hemisphere is tilted toward or away from the sun.
VERNAL EQUINOXThe day of the year that marks the beginning of spring in the Northern Hemisphere.
AUTUMNAL EQUINOXThe day of the year that marks the beginning of fall in the Northern Hemisphere.
PHASEOne of the different shapes of the moon as seen from Earth.
ECLIPSEThe partial or total blocking of one object by another.
SOLAR ECLIPSEThe blocking of sunlight to Earth that occurs when the moon is between the sun and Earth.
PENUMBRAThe part of a shadow surrounding the darkest part.
LUNAR ECLIPSEThe blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon.
GRAVITYThe attractive force between two objects; its magnitude depends on their masses and the distance between them.
SATELLITEAny object that revolves around another object in space.
TELESCOPEA device built to study distant objects by making them appear closer.
CRATERA round pit on the moon's or other surface, created by a force of impact.


Science Teacher
American Renaissance School

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