Chapter 29 Flashcards
A rise or fall in the ocean surface.
Tide
Reflects the change in appearance of the Moon as seen from Earth.
Moon phase
Occurs when the Moon moves directly between the Sun and Earth and casts a shadow on Earth.
Solar eclipse
Occurs when Earth passes between the Sun and the Moon and casts a shadow on the Moon.
Lunar eclipse
The dark-coloured, flat, lava-filled regions on the Moon’s surface.
Maria
A layer of dusty lunar material produced by collisions between asteroids and comets and the Moon.
Regolith
How many days does it take the moon to revolve around Earth?
27.3 days
A complete lunar phase cycle takes 29.5 days, what is this called?
Synodic month
Do we ever see the back side of the moon?
No
What causes a tide to rise or fall?
The gravitational pulls of the Sun and the Moon.
What is the rise of sea level called? After the sea level rises how many hours does it take for the sea level drop?
It’s called a high tide. It takes about 6 hours for the sea level to drop.
Which is farther from Earth, the Sun or the Moon?
The Sun
Does the moon or the Sun cause a greater effect on Earth’s tides?
The Moon.
How are the Sun, the Earth, and the Moon aligned for a Spring tide?
The Sun, the Earth, and the Moon are all in a straight line.
How are the Sun, the Earth, and the Moon aligned for a neap tide?
An L tilted 90 degrees.
What does the phase of the Moon you see depend on?
It depends on the position of the Earth, Moon, and Sun.
When does a new moon occur?
When the Moon is between Earth and the Sun.
How many phases of the moon are there?
8
What is the definition of waxing phases?
The illuminated portion that we see appears larger each night.
What is the definition of waning phases?
The illuminated portion that we see appears to diminish each night.
What are the Moon phase names?
New Moon, waxing crescent, 1st quarter, waxing gibbous, full Moon, waning gibbous, 3rd quarter, and waning crescent.
Where is the word month derived from?
It is derived from the word Moon.
How is the Earth, Moon, and Sun aligned during a solar eclipse?
In a straight line; the Sun, Moon, and then the Earth.
What is an umbra?
It is where the darkest shadow of the Moon hits the Earth; a total solar eclipse.
What is a penumbra?
It is the lighter shadow of the Moon that hits Earth.
How is the Earth, Moon, and Sun aligned during a lunar eclipse?
A straight line; Sun, Earth, and then the Moon.
How are the depressions on the Moon formed?
From asteroids and comets hitting it.
Are there mountains on the Moon?
Yes, but they are not formed like Earth’s mountains.
Which side of the moon is thicker?
The dark side of the moon.
Is the mantel of the Moon solid or a liquid.
It’s a solid.
What did the Clementine spacecraft do? (2 things)
It confirmed the thickness of the Moon and helped provide information of minerals on the Moon.
What did the Lunar Prospector do? (3 things)
It orbited the Moon and took photos of the lunar surface, confirmed that the Moon had a small, iron-rich core about 600 km in diameter, it also confirmed evidence of ice on the Moon.
What is the Giant Impact Theory
A Mars sized object collided with Earth, sending debris into orbit that formed the Moon.
