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Science-period 6 > Space > Flashcards

Space Flashcards

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1
Q

the 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 orbiting planets and moons and other objects

A

Solar System

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3
Q

Millions and billions of stars held together 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

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

A

Axis of Rotation

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7
Q

The motion of one body around another, such as the Earth in its orbit around the sun

A

Revolution

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8
Q

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

A

Season

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9
Q

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

A

Equinox

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10
Q

In an orbit, a position and time during which one hemisphere receives the maximum sunlight or darkness

A

Solstice

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11
Q

A large, dark plain of solidified lava on the surface of the moon

A

Mare

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12
Q

an event whereby one object in space casts a shadow on another

A

Eclipse

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13
Q

the average distance from the sun which is 93 million miles

A

Astronomical Unit

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14
Q

A round pit left on the surface of a planet after a smaller object strikes the surface

A

Impact Crater

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15
Q

A small solid rocky body that orbits the sun

A

Asteroid

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16
Q

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

A

Comet

17
Q

a brief streak of light produced by a particle entering earth’s atmosphere at high speed

A

Meteor

18
Q

a small object from outer space that passes through Earth’s atmosphere and reaches the surface

A

Meteorite

19
Q

Earth centered theory of the solar system

A

Geocentric

20
Q

A sun centered theory of the Universe

A

Heliocentric

21
Q

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

A

Gravity

22
Q

the rise and fall of the ocean’s surface levels due to the gravitational pull of the sun and moon

A

Tide

23
Q

The gradual increase of the illuminated surface of the moon

A

Waxing

24
Q

The gradual decrease in the illuminated surface of the moon

A

Waning

25
Q

More than half but less than fully illuminated

A

Gibbous

26
Q

The illuminated surface is less than a quarter illuminated

A

Crescent

27
Q

Entire surface is illuminated

A

Full moon

28
Q

Entire surface isn’t illuminated

A

New moon

29
Q

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

A

Umbra

30
Q

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

A

Penumbra

31
Q

An oval or flattened circle

A

Ellipse

32
Q

A planet that has a rocky surface

A

Terrestrial planet

33
Q

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

A

Gas Giant

34
Q

Half the surface is illuminated

A

Quarter Moon

Science-period 6 (4 decks)

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