why are hills green.

how are hils made

how does it rain?

how do trees make exaust into oxygen?

how hard is the hardest rock in the world

why do animals exsist

what is a word?

how big is bigist mountain

what is a clowd made from?

how big was the bigist wave in the wold

what are clouds made from?

how is earth made & how is it so big?

How is land made?

How are mountains made?

Where does water come from?

What are clouds?

How thick is the crust of the Earth?

How deep are the oceans?

How much does the earth weigh?

What is a mountain?

What are the continents?

How high is the tallest mountain?

What are gemstones and how are they made? how many are there?

How are streams and rivers made?

Why is Earth the only living planet?

How were hills made?