Space Flashcards

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1
Q

Solar system

A

The sun, planets, and various smaller bodies make this up.

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2
Q

Universe

A

Space and all the matter in it.

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3
Q

Satellite

A

An object that orbits a more massive object

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4
Q

Impact crater

A

When an object strikes the surface of a larger Object in space it explodes and leaves behind a round pit called

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5
Q

Axis of rotation

A

An imaginary line in the middle of the earth that the earth spins on.

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6
Q

Revolution

A

The motion of one object around another

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7
Q

Season

A

Patterned of temperature changes and other weather trends over the course of a year.

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8
Q

Equinox

A

Sunlight shines equally on the northern and Southern Hemispheres.

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9
Q

Mare

A

Large dark Baltic plains on earths moon.

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10
Q

Eclipse

A

Occurs when a shadow makes the sun or moon seem to grow dark.

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11
Q

Umbra

A

The darkest part

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12
Q

Penumbra

A

The lighter shadow

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13
Q

AU

A

Average distance from the sun.

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14
Q

Ellipse

A

The shape of each orbit

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15
Q

Terrestrial planet

A

The planets closest to the sun.

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16
Q

Gas giants

A

Mainly made of hydrogen helium and other gases.

17
Q

Asteroids

A

Small solid rocks bodies the orbit close to the sun.

18
Q

Comet

A

An object that produces a coma.

19
Q

Meteors

A

Brief streaks of light.

20
Q

Meteorite

A

A space object that reaches earths surface.

21
Q

Geocentric

A

Measured from or considered in relation to the center of the earth.

22
Q

Heliocentric

A

measured or considered relation to the center of the sun.

23
Q

Gravity

A

The force that attracts a body toward the center of the earth.

24
Q

Tide

A

Periodic rises and falls of large bodies of water.

25
Q

Waxing

A

The moon at any time after new moon and before full moon.

26
Q

Waning

A

Part of the moons visible surface illuminated so that it appears to decrease in size.

27
Q

Gibbous moon

A

The phase where the moon is more than half illuminated.

28
Q

Crescent moon

A

Phase where the moon is less than half illuminated.

29
Q

Full moon

A

The phase where the whole moon is illuminated.

30
Q

New moon

A

The pause where the moon is invisible from earth.

31
Q

Quarter moon

A

Phase where half the moon is lit.

32
Q

Orbit

A

The path of an object in space as it moves around another object because of gravity.