CH 29.3 Flashcards

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1
Q

Periodic rise and fall in sea level caused by gravitational attraction among Earth, the Moon and the Sun

A

Tide

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2
Q

Change in appearance of the Moon as viewed from Earth, due to the relative positions of Earth, the Sun, and the Moon

A

Moon Phase

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3
Q

Occurs when the Moon passes between the Sun and Earth, and casts a shadow on part of Earth

A

Solar Eclipse

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4
Q

Occurs when Earths shadow falls on the moon

A

Lunar Eclipse

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5
Q

Relatively flat, dark-colored regions on the Moon’s surface

A

Maria

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6
Q

Layer of loose, ground-up rock on the lunar surface formed by the accumulation of impact material

A

Regolith

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7
Q

How many days does it take the moon to revolve around Earth?

A

27.3 days

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8
Q

A complete lunar phase cycle takes 29.5 days, what is it called?

A

Synodic Month

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9
Q

Do we ever see the back side of the moon?

A

No

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10
Q

What causes a tide to rise or fall?

A

The gravitational pulls of the sun and moon

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11
Q

What is the rise of sea level called?

A

High tide

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12
Q

After the sea level rises how many hours does it take for the sea level to drop?

A

Six hours

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13
Q

Which is farther from Earth, the sun or the moon?

A

The sun

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14
Q

Does the moon or the sun cause a greater effect on Earth’s tides?

A

The moon

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15
Q

How are the sun, the Earth, and the moon aligned for a spring tide?

A

There in a straight line the sun, earth, and moon.

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16
Q

How are the sun, the Earth, and the moon aligned for a neap tide?

A

90 degree angle

17
Q

What does the phase of the moon you see depend on?

A

On the positions of the moon, earth, and sun relative to one another

18
Q

When does a new moon occur?

A

When the moon is between earth and the sun

19
Q

How many phases of the moon are there?

A

8 phases

20
Q

What is the definition of waxing phases?

A

The illuminated portion that we see appears larger each night

21
Q

What is the definition of waning phases?

A

They are less illuminated as the nights go on

22
Q

What are the moon phase names?

A

New, waxing crescent, 1st quarter, waxing gibbous, full, waning gibbous, 3rd quarter, and waning crescent

23
Q

Where is the word month derived from?

A

The same root word word as Moon

24
Q

How is the earth, moon, and sun aligned during a solar eclipse?

A

Sun moon earth

25
Q

What is an umbra?

A

the darkest portion of the moon’s shadow on earth

26
Q

What is a penumbra?

A

A partial solar eclipse

27
Q

How is the earth, moon, and sun aligned during a lunar eclipse?

A

Moon, Earth, and Sun

28
Q

How are the depressions on the moon formed?

A

By meteorites, asteroids, and comets

29
Q

Are there mountains on the moon?

A

Yes

30
Q

Which side of the moon is thicker?

A

The dark side of the moon

31
Q

Is the mantel of the moon a solid or a liquid?

A

Solid

32
Q

What did the Clementine spacecraft do? (2 things)

A
  1. It conformed the thickness on the moon.

2. It provided information on the mineral content of Moon rocks.

33
Q

What did the Lunar Prospector do? (3 things)

A
  1. It took pictures of the moon
  2. Confirmed the moon has a small iron-rich core
  3. Collected evidence that there is presence of water-ice on the moon
34
Q

What is the Giant Impact Theory?

A

Mars sized object collided with earth, where debris were thrown into orbit, then condensed into a large mass forming the moon.