Was Earth always solid?
no
Why not?
extreme volcanism
Any other reason?
collisions with other bodies.
Did the collisions occur frequently?
fno
What formed on the outside?
a solid crust
Did the Moon form before or after the crust?
after
What became plentiful in the atmosphere?
water
What caused the Moon to be created?
The Earth was hit by an object
What size object?
the size of Mars
Did some of the object stay on Earth?
yes
Where did the rest go?
into space
What are the seas made of?
water vapor
Anything else?
comet ice
How many things created the atmosphere?
two
What was one?
Outgassing
And the other?
volcanic activity
How big was the object that hit the Earth?
10% of the Earth's mass
Did it hit directly
ino
Did the collision affect Earth?
yes
How?
it altered its internal composition