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Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

In this activity (page 1 of the PDF under SciGirls Activity: Bogs), learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

Learners make their own paper. They start by shredding old newspaper, clean toilet paper, and clean paper towels.

Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

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