Water evaporates from the surface into the sky and back down to the earth as what? a) clouds b) thunder c) rain d) lightning

The correct answer is - c) rain.

When the water evaporates it turns into water vapor. Since the water vapor is less dense, and thus easier, than the air, it lifts up into the atmosphere. On its way up , the water vapor will eventually reach a certain height where the temperature is much colder, and that will start to process of condensation. As it condensates, the water vapor turns into tiny drops of water, and it starts to create a cloud. Under the influence of the pull force of the gravity, this tiny drops will start falling back on the Earth's surface in the shape of a rain.