Relationships in Space Flashcards

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1
Q

Rotation

A

an object’s spinning on its axis

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2
Q

Revolution

A

the object’s orbital motion around another object

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3
Q

Tides

A

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon

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4
Q

Aphelion

A

the point in the orbit of a planet, comet, or other body most distant from the Sun.

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5
Q

Perihelion

A

the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun

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6
Q

Apogee

A

the point in the orbit of the moon or a satellite at which it is furthest from the earth.

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7
Q

Perigee

A

the point in the orbit of the moon or a satellite at which it is nearest to the earth

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8
Q

Umbra

A

the dark central part of a sunspot

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9
Q

Penumbra

A

the less dark outer part of a sunspot

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10
Q

What degree is the Earth tilted?

A

23.5

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11
Q

What type of path does the Earth revolve around the sun?

A

Ellipse/ Elliptical path

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12
Q

What is the equinox of the northern and southern hemispheres?

A

Northern hemisphere:
Top of the Earth- Autumnal equinox; Sept 22-23
West Earth- Winter Solstice; Dec. 21-22
Bottom of the Earth- Vernal/Spring Equinox; March 20-21
East Earth- Summer Solstice; June 20-22

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13
Q

When the Northern hemisphere is tilted toward the sun, what season is it?

A

Summer

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14
Q

When the Northern hemisphere is tilted away from the sun, what season is it?

A

Winter

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15
Q

How is the Earth positioned in Spring and Autumn?

A

Both the Southern and Northern hemispheres are pointed 90 degrees from the Sun, so neither hemispheres are pointed towards or away from the Sun.

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16
Q

When the sun’s rays hit directly at the Tropic of Cancer, what season is the Northern Hemisphere experiencing?

A

Summer

17
Q

When the sun’s rays hit directly at the Tropic of Capricorn, what season is the Northern Hemisphere experiencing?

A

Winter & Booty Creek Cheek Freak

18
Q

How fast does light travel?

A

300,000 kilometers per second

19
Q

How many high tides and low tides are there daily?

A

two neap and spring tides daily

20
Q

Why there is not a solar and lunar eclipse each month?

A

The 5 degree tilt of the moon is the reason we cannot have eclipses every month. There are not a solar and lunar eclipse each month because even though they the Earth, Moon, and Sun end up lining up every month due to the moon’s orbit, the 5 degree tilt of the moon often causes the shadow of the moon that would cause the solar or lunar eclipse to pass over or below the Earth. So when earth is tilted months later in a certain season a solar eclipse can happen. So this is why we cannot have eclipses every month.