Water arrived on Earth in the form of 1.)___ from comets and meteoroids. Earth’s surface
2.___ was enough to turn it into 3.)___ that, once it cooled, brought rains to fill the oceans.

1. A. precipitation
B. vapor
C. icy debris

2. A. rigid
B. hot
C. cold

3. A. water vapor
B. ice
C. crustal rocks