There was one thing that I was always curious about. Why does the Earth have so much water when all the other planets are dry? Where did all this water come from?
Well, now there are a few theories. Read this blog post and discuss them with your English teacher
the sound of one hand clapping
solar system denizens
each has been fingered
high ambient temperatures
Which theory of how water got to Earth do you think is the best?
How many comets do you think have actually hit the Earth?
Did they have enough water in them to supply the oceans?
How did the Earth's gravity capture the water?
How could have the astroids dropped water to Earth?
Lesson Plan by Rachael Alice Orbach - Professional English teacher