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In this activity, learners discuss the different salinities of oceans, rivers and estuaries.

In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

Learners create three solutions with different levels of salinity. They compare the density of these solutions by coloring them and layering them in a clear plastic cup and in a soda bottle.

This activity provides a hands-on experience with a scale model, a relatively high viscosity fluid, and feeding behaviors.

In this edible experiment, learners pour "Magic Shell" chocolate into a glass of cold water. They'll observe as pillow shaped structures form, which resemble lavas on the sea floor.