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Learners explore water's property of cohesion through two investigations.

In this activity about water's cohesive and adhesive properties and why water molecules are attracted to each other, learners test if objects repel or absorb water.

In this activity (page 10), learners explore how molecules self-assemble according to forces of attraction and repulsion.

In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

Learners explore water adhesion and learn about why water molecules are more strongly attracted to some substances than others.