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

$1 - $5 per group Ages 6 - adult 30 to 45 minutes
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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this outdoor activity, learners search for lichen, a combination of a fungus and an alga living together. Lichen grow where most other plants cannot, on rocks, the trunks of trees, logs and sand.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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In this design challenge, learners will engineer a structure and see if it can survive an earthquake they create.

free Ages 8 - adult 1 to 2 hours
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Did you know that you would be a different age if you lived on Mars? It's true!

free Ages 8 - 18 10 to 30 minutes
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In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

Over $20 per group Ages 8 - adult 1 to 7 days
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In this lab activity, learners explore how to initiate a density current. Learners measure six flasks with different concentrations of salt and water (colored blue).

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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This fun and simple hands-on astronomy activity lets learners create 3D models of the Earth, Moon and Sun to demonstrate solar and lunar eclipses.

$5 - $10 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners discuss the different salinities of oceans, rivers and estuaries.

$5 - $10 per group Ages 8 - adult 1 to 7 days
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In this activity, learners discover how the extent of various wind speeds changes in each of the four quadrants around a hurricane.

free Ages 11 - 18 10 to 30 minutes
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In this activity, learners explore how the power of the sun can be harnessed to heat and cool a building.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners investigate various appliances and electronics, discovering how much energy each uses and how much carbon dioxide (CO2) is released to produce that energy.

Over $20 per group Ages 11 - 18 1 to 2 hours
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In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front-silvered mirrors.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.

1 cent - $1 per group Ages 4 - adult Under 5 minutes
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In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.

$1 - $5 per group Ages 4 - adult Under 5 minutes
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In this simulation, learners use M&M™ candy to explore radioactive isotope decay.

$1 - $5 per student Ages 11 - 18 30 to 45 minutes
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In this outdoor archaeology activity, learners use mathematical skills and scientific inquiry to generate and process information from their own excavation site.

$10 - $20 per group Ages 11 - 18 1 to 7 days
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In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs.

1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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Millions of organisms can live in and around a body of water.

1 cent - $1 per student Ages 8 - adult 45 to 60 minutes