Show the animation Evaporation. Explain that water molecules leave the liquid state and form water vapor, a gas. The molecules in water vapor become part of the air. The process of water leaving a ...

It simply moves around in what is called the water cycle. The water cycle is the continuous journey of water from oceans and lakes, to clouds, to rain, to streams, to rivers and back into the ...

Around the globe, hotter temperatures stoked by climate change are increasing the odds of both severe drought and heavier precipitation that can wreak havoc on people and the environment.

Glaciers are melting faster than ever. As the planet gets hotter, our frozen world is shrinking, making the water cycle more unpredictable. For billions of people, meltwater flows are changing ...