chapter 22 science Flashcards
A on test (23 cards)
The moon’s craters likely formed from
space rock impacts
The moon’s mass percent compared to the earth’s mass percent
about 1%
The only region of the sun that is visible during a total eclipse
the corona
The distance between the sun and the earth
93 million miles
Why is the moon almost a perfect sphere
because of its slow rotation
When is the best time to view different feature on the moon
during a quarter moon
The 2 most abundant elements in the sun
What are hydrogen and helium
Define apparent motion
motion seen due to earth’s rotation
Describe what the ecliptic plane is
invisible plane that orientates the galaxy with the sun and earth being on a constantly even plane
The moon’s gravity compared to the earth’s gravity
about 1/6th
The photosphere is another name for
visible surface of the sun
Where are the earth, sun and moon during a lunar eclipse
sun, earth, moon in that order
What causes sunspots on the sun
magnetic disturbances
What is an earth tide
the same as an ocean tide, but instead pulls on the earth’s crust rather than its waters
Explain what the moon’s terminator is
line between light and dark sides of the moon
Term for when the moon is at its closest point to the earth
its perigee
Why the moon does not go completely dark during a lunar eclipse
earth’s atmosphere deflects some light to it
Explain why we only ever see one side of the moon?
because its rotation and revolution around the earth are the same rate
The amount of days it takes for the moon to goes through all of its phases
30 days
Theory of the moon’s creation that best explains the moon and earth’s similar, but different rocks
giant impact theory
The moons brightest crater
tycho
What do we usually compare the diameter of the moon to?
the width of the USA
Libration idea
The idea that the moon has a slight wobble in its orbit
