Moon/space Flashcards

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1
Q

the circular path of an object as it revolves around another object due to gravity

A

Orbit

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2
Q

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

A

Solar system

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3
Q

Millions or billions of stars held together in a group by their own gravity

A

Galaxy

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4
Q

Space and all the matter and energy in it

A

Universe

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5
Q

An object that orbits a more massive object

A

Satellite

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6
Q

A round pit left behind on the surface of a planet or other body in space after another smaller object strikes the surface

A

Impact crater

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7
Q

An imaginary line about which a turning body such as earth rotates

A

Axis of rotation

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8
Q

The motion of one body around another, example of earth around the sun

A

Revolution

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9
Q

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

A

Season

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10
Q

In an orbit, a position and time in which sunlight shines equally on the northern and southern hemisphere

A

Equinox

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11
Q

In an orbit, a position and time during which ones hemisphere receives its maximum area of sunlight while the other hemisphere receives it minimum amount.

A

Solstice

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12
Q

A large dark plain of solidified lava on the moon

A

Mare

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13
Q

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

A

Eclipse

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14
Q

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

A

Umbra

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15
Q

The region of lighter shadow that may surround a dark central region. The spreading cone of lighter shadow cast by an object

A

Penumbra

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16
Q

Average distance from the sun which is approximately 93,000,000 miles or 150 million kilometers

A

Astronomical Unit (AU)

17
Q

An oval or flattened circle

A

Ellipse

18
Q

A planet that has a rocky surface

A

Terrestrial planets

19
Q

A large plane that consists mostly of gases in a dense form

A

Gas giant

20
Q

a small rocky body orbiting the sun.

A

Asteroid

21
Q

A body that produce a coma of gas and dust, a small icy body that orbits the sun

A

Comet

22
Q

a brief streak of light produced by the particle entering earths atmosphere at high speed

A

Meteor

23
Q

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

A

Meteorite

24
Q

Earth centered theory of the solar system

A

Geocentric

25
Q

A sun centered theory of the solar system

A

Heliocentric

26
Q

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

A

Gravity

27
Q

The rise and fall of the ocean levels caused by the gravitational pull of the moon

A

Tide

28
Q

The gradual increase of the illuminated surface of the moon

A

Waxing

29
Q

(of the moon) have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in si

A

Waning

30
Q

(of the moon) having the observable illuminated part greater than a semicircle and less than a circle.

A

Gibbous moon

31
Q

the curved sickle shape of the waxing or waning moon.

A

Crescent

32
Q

the phase of the moon in which its whole disk is illuminated.

A

Full moon

33
Q

the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent.

A

New moon

34
Q

Third Quarter. The moon is one-half illuminated by the sun. Occurs when the moon’sillumination is decreasing, Waning Crescent. The moon is less than one-half illuminated by the sun but less than one quarter illuminated

A

Quarter moon