What is Phobos primarily composed of?
Mars' larger moon Phobos is slowly falling apart, NASA says

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Science, Physics, Other
•
11th Grade - University
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ice
Metallic core
A pile of rubble
Solid rock
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What do the grooves on Phobos' surface suggest?
Stress from gravitational forces
Water erosion
Impact craters
Volcanic activity
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How far is Phobos from Mars?
10,000 kilometers
6,000 kilometers
15,000 kilometers
1,000 kilometers
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At what rate is Phobos being pulled closer to Mars?
2 meters every 100 years
20 meters every 100 years
5 meters every 100 years
10 meters every 100 years
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In how many years is Phobos expected to be destroyed?
10 to 20 million years
30 to 50 million years
100 to 200 million years
500 to 600 million years
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