Based on our current theory of Earth's formation, the water we ...

[CBme]

Based on our current theory of Earth's formation, the water we drink comes from
 
  A) ice that condensed in the solar nebula in the region where Earth formed.
  B) chemical reactions that occurred in Earth's crust after Earth formed.
  C) chemical reactions that occurred in Earth's core after Earth formed.
  D) material left behind during the giant impact that formed the Moon.
  E) comets that impacted Earth.

Question 2

Dawn images of Vesta show that it is much wider than it is tall. What might be the reason for its irregular shape?
 
  What will be an ideal response?

[al]

Answer to Question 1

E

Answer to Question 2

It is probably the result of an impact. There is a huge impact crater site at Vesta's south pole, with a central peak that is one of the largest mountains in the solar system. Had it not been for this giant impact, Vesta would have much more mass, and would have enough gravity to be spherical in shape.

[CBme]

Thank you!

[al]

Always glad to help...