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    In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV). Faced with concerns that environments around the world might be undergoing rapid...

    free Ages 6 - 14 5 to 10 minutes
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    In this quick activity about pollutants and groundwater (page 2 of PDF), learners build a model well with a toilet paper tube. Learners use food coloring to simulate pollutants and observe how they...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    In this activity (page 2 of PDF), learners will model how caves are formed by placing one piece of chalk in a cup of vinegar and another piece in a cup of water, then watch and record their...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    This activity (located on page 4 of the PDF) is a full inquiry investigation to determine the age of fossils based on where they are discovered. Groups of learners will dig for fossils embedded in...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    In this activity, (on page 6 of the PDF) learners participate in a hands-on fossil excavation. Groups of learners will receive a shoebox full off sand in which several chicken bones have been...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    In this activity (page 1 of the PDF), learners will model how paleontologists estimate the age of fossil discoveries by extracting “fossil” playing cards from newspapers stacked in chronological...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    In this activity, learners will model how a sea turtle population changes over time, from eggs to adults, using puffed rice. Learners create a chart, calculate population fluctuation for each...

    1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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    This is an activity (located on page 3 of the PDF) about the use of reduction agents to decontaminate ground water. Learners will conduct a reduction-oxidation (redox) reaction in which vitamin C...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    This activity (on page 2 of the PDF) is a full inquiry investigation into aerial imagery. Learners will use the internet to gather free aerial imagery of nearby points of interest (or use laminated...

    free Ages 8 - 14 45 to 60 minutes