Carlos is building a model of the water cycle. In his model, he includes a hill with a river leading to a valley. What does this feature represent in the model?

The blank theory suggests that the sun, planets, and other celestial bodies of the solar system came from a cloud of dust and gas? a.) condensationb.) steady state c.) big bang d.) nebular

The mantle is made up of which structural zones?

What is the mostly tropical region in asia