Discover how capillary action works with the Walking Water Experiment. Students will learn about capillary action. Plants couldn’t survive without capillary action. Capillary action is when a liquid, like water, moves up something solid, like a tube or into a material with a lot of small holes. Capillary action works against gravity because of three special forces called cohesion, adhesion and surface tension. 

This is a publicly available resource developed by the Little Green Thumbs program, a classroom gardening program. Learn more about the Little Green Thumbs program in your region.