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Science Flashcards

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1
Q

Eclipse

A

An oval or flattened circle

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2
Q

Full moon

A

The entire surface of the moon is illuminated

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3
Q

Mare

A

A large dark plain of solidified lava on the moon

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4
Q

half of the moon is illuminated

A

Quarter moon

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5
Q

Penumbra

A

A region of lighter shadow that may surround a dark central region

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6
Q

Waning

A

The gradual decrease in the illuminated surface of the moon

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7
Q

Terrestrial planet

A

A planet that has a rocky surface

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8
Q

Astronomical unit

A

Average distance from the sun which is 93,000,00 miles

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9
Q

Gas giant

A

A large that planet that consists mostly gases in a dense form

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10
Q

Seasons

A

One pattern of temperature changes and other weather trends over the course of a year

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11
Q

Solar system

A

The sun and its family of orbiting planets and moons and other objects

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12
Q

Crescent moon

A

The illuminated surface is less than a quarter illuminated

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13
Q

Revolution

A

The motion one body around another such as the earths in its orbit around the sun

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14
Q

Waxing

A

The gradual increase of the illuminated surface of the moon

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15
Q

Eclipse

A

An event during which one object in space casts a shadow onto another

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16
Q

Meteorite

A

A small object from outer space that passes through earths atmosphere and reaches the surface

17
Q

Impact crater

A

A round pit left behind the surface of a planet after a small object strikes the surface

18
Q

Universe

A

Space and all the matter and energy in it

19
Q

Gravity

A

The force that objects exert on one other because of their mass

20
Q

Umbra

A

The dark central region of a shadow such as the cone of complete shadow cast by an object

21
Q

Comet

A

A Body that produces a coma of gas and dust a small icy body that orbits the sun

22
Q

Tide

A

The rise and fall of the oceans caused by the gravitational pull of the moon and the sun

23
Q

Equinox

A

In a orbit a position and time in which sun shines equally on both hemispheres

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