Explain

Rivers distribute water as they flow through a watershed. They are a key source of water for agricultural irrigation, and communities depend on rivers as a reliable water supply.

How does water move?

You know that water can be a solid, a liquid, and a gas. Wow! How amazing is that? But how can water be all three states of matter?

 

Water transforms into each state as it moves through the water cycle. What is the water cycle? Select the Turn button to read the definition for the vocabulary word.

Play this video clip which introduces the water cycle.

Credit: Alabama Public Television and Concrete Dream Inc./Steve Trash

You just learned that water moves continuously on Earth. The water cycle has many different stages but it has no beginning or end because it is a continuous cycle. But what causes water to move?

Play this video clip to learn about the Sun’s role in the water cycle.

Credit: Alabama Public Television and Concrete Dream Inc./Steve Trash