Compared to Earth's diameter, what is moon's diameter?
The moon's diameter is one quarter of Earth's
100
To hit or crash into something
impact
100
The object that caused damage as a result of the impact
impactor
100
Who was the scientist that noticed features on the moon and in what year?
Galileo in 1609
200
What are round pits on the surface of the moon called?
Craters
200
Why does the temperature vary so much on the moon?
It does not have an atmosphere
200
Piles of rock at impact site as a result of the impact
Ejecta
200
Streaks of material around the circular hole as a result of impact
Rays
200
How was the moon formed?
Material from Earth was ejected into space after a collision with a large object. The material formed a right that orbited Earth. The material was then shaped into the moon by gravity.
300
What are dark, flat areas of hardened rock?
Maria
300
What evidence is there of water on the moon?
There could be frozen water at the poles and in deep craters.
300
Having to do with the moon
Lunar
300
The distance across a circle
Diameter
300
What are craters on the moon caused by?
They are caused by the impacts of meteroids, chunks of rocks or dust from space.
400
What are mountains that cover much of the moon's surface?
Highlands
400
What does an atmosphere do?
An atmosphere traps gases which then traps heat from the sun's energy.
400
How deep something may be
Depth
400
A device built to make distant objects seem closer
Telescope
400
What did the data reveal about the relationship between crater size and how high up the impactor was released?
The higher the impactor was released the wider the crater size.
500
How do scientists believe Maria were created?
From ancient lava flows
500
How did Galileo identify mountains on the moon?
He saw they had light features and he noticed there were dark shadows.
500
Chunks of rock or dust from space
Meteoroids
500
The theory that explains the formation of the moon
Collision ring theory
500
What did the data reveal about the relationship between ejecta rays and how high up the impactor was released?
The higher the impactor was released the ejecta rays got longer.