30.2 Flashcards
1
Q
mercury
A
the smallest planet and closest to the sun
2
Q
Venus
A
The second closest planet to the sun
3
Q
earth
A
the third planet from the sun
4
Q
mars
A
the fourth planet from the sun
5
Q
How did the solar system form?
A
nebula collapse
6
Q
How long ago did the solar system form?
A
4.6 billion years ago
7
Q
What type of atmosphere does mercury have?
A
no true atmosphere
8
Q
Earths sister is what planet?
A
Venus
9
Q
Whats Venus atmosphere like?
A
hot and dense
10
Q
temperatures on earth allow water states?
A
solid,liquid,gas
11
Q
Another name for mars is?
A
the red planet
12
Q
why is mars red?
A
because of the iron-oxide
13
Q
what are mars moons name
A
Phobos(fear) and Deimos(panic)
14
Q
What was spirit and opportunity mission?
A
finding liquid water
15
Q
what did mars reconnaissances orbiter discover?
A
sediment layering and gullies
