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Super Soaker
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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.

Causes and Effects of Melting Ice
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In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

"Boyle-ing" Water
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In this activity, learners explore Boyle's Law and discover that water will boil at room temperature if its pressure is lowered.

Cleaning Water with Dirt
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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

Small Habitats
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In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).

Sand Castle Saturation
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In this activity about saturation (page 1 of PDF under SciGirls Activity: Sand Dunes), learners will build a series of sand castle towers using a 16 oz cup.

Soda Geyser
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In this quick activity (page 1 of PDF under SciGirls Activity: Lift Off), learners will use the ever-popular soda geyser experiment to test the reactivity of the various sugar candies or mints.

Monitoring Amphibians
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In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.
MarsBound!: Mission to the Red Planet
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MarsBound! is an engineering simulation activity in which learners use realistic techniques to plan a mission to Mars.

Show Your Colors!
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In this family or group activity, learners conduct a chromatography experiment to reveal the colors that leaves "hide" under their green pigments.

Changing the Density of a Liquid: Heating and Cooling
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Learners investigate how the temperature of water affects its density.

Marine Ecosystems
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In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.

Water Treatment
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Water treatment on a large scale enables the supply of clean drinking water to communities.

Can Fishing
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In this outdoor activity, learners go "can fishing" and discover the kinds of aquatic organisms that live in and on submerged cans.

Oil Spot Photometer
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

Angles and Area
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In this activity (page 10 of PDF), learners approximate the area of the uppermost cross section of an impact crater using a variety of square grids.
Soil Secrets
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In this activity (located at the bottom of the page), learners investigate soil and explore the creatures that live in it.

Bury Me Not!
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This activity (page 2 of the PDF under SciGirls Activity: Bogs) is a full inquiry investigation into decomposition.

Stick to It: Adhesion II
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Water sticks to all kinds of things in nature — flowers, leaves, spider webs - and doesn't stick to others, such as a duck's back.

Freshwater Ecosystems
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In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish.