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Learners test two jars of ice water, one covered and one open, for changes in temperature. After placing the jars in the sun, learners discover that the covered jar cools down more slowly.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity about the circulatory system and space travel (on page 38 of the PDF), learners use water balloons to simulate the effects of gravity and microgravity on fluid distribution in the bod

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore dinosaur fossils by making cast models of a T. rex. First, learners read about and research how dinosaur fossils form.

Over $20 per group Ages 6 - 8 4 to 24 hours
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Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

1 cent - $1 per group Ages 6 - adult 5 to 10 minutes
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In this multi-step experiment (page 4 of pdf), learners study tide pools, and then drop a "wave" (a 4-pound bag of beans or birdseed) on a shell to mimic the force of crashing surf on tide pool animal

1 cent - $1 per student Ages 8 - 11 45 to 60 minutes
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In this activity, learners create a biosphere in a baggie.

$1 - $5 per student Ages 4 - 11 1 to 7 days
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Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.

$5 - $10 per group Ages 6 - adult 10 to 30 minutes
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In this group activity, learners will explore the characteristics, functions and uniqueness of the mangrove tree.

$1 - $5 per group Ages 4 - 14 45 to 60 minutes
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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.

$5 - $10 per group Ages 8 - 14 30 to 45 minutes
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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.

$10 - $20 per group Ages 8 - adult 1 to 2 hours
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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

$10 - $20 per group Ages 8 - adult 10 to 30 minutes
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In this activity (page 4 of the pdf), learners build a model of a tide pool, using chicken wire, paper mache, and other craft materials.

$1 - $5 per student Ages 6 - 11 1 to 2 hours
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Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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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.

Over $20 per group Ages 8 - adult 2 to 4 hours
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In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.

$10 - $20 per group Ages 11 - 18 1 to 7 days
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Water treatment on a large scale enables the supply of clean drinking water to communities.

$5 - $10 per group Ages 11 - adult 45 to 60 minutes
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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.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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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.

1 cent - $1 per student Ages 14 - 18 10 to 30 minutes
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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

$10 - $20 per group Ages 8 - adult 10 to 30 minutes
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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.

free Ages 4 - 11 1 to 7 days