The water cycle
Water moves among the atmosphere, land, and bodies of water.
Explore the lesson →Learning path01 02 03
Build understanding one idea at a time.
Read in order or select a topic. The suggested grade range is 5–8; educators should assess suitability for their learners.
Watersheds and runoff
A watershed is the land area that drains toward a common outlet.
Explore the lesson →Weather versus climate
Weather describes atmospheric conditions over short periods.
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