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    Twin Cities Public Television
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    This activity (located on page 3 of the PDF) is a full inquiry investigation into tree growth rates. Groups of learners will count tree rings to determine each tree’s age. A thorough sample of...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes
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    WGBH
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    In this engineering activity (page 3 of PDF), young learners investigate how a pole can be made stable by “planting” its base in the ground or adding supports to the base. First, learners observe...

    $1 - $5 per group Ages 4 - 8 30 to 45 minutes
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    American Museum of Natural History
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    Learners work in teams to investigate how scientists use physical characteristics to classify living things. First, learners examine drawings of a variety of leaves from different species of oak...

    free Ages 8 - 18 45 to 60 minutes
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    Lawrence Hall of Science
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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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    Lawrence Hall of Science
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    This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface. Learners set containers with water in a...

    1 cent - $1 per student Ages 4 - 14 2 to 4 hours
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    National Park Service
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    In this online interactive, learners investigate fires, particularly the causes and behavior of forest fires, as well as how the National Park Service deals with fires. Learners modify conditions ...

    free Ages 6 - 14 5 to 10 minutes
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    Educational Development Center, Inc.
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    In this indepth hands-on activity, learners build a structure that allows them to observe the growth of roots and the correlation between root growth and stem extension. Because no dirt is used in...

    $10 - $20 per group Ages 8 - 14 1 to 4 weeks
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    Twin Cities Public Television
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    In this activity (located on page 2 of the PDF), learners will identify a group of deciduous trees to study. Once the species has been recorded, the circumference of the trunks will be measured at...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    NOAA
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    In this activity, learners are introduced to tree rings by examining a cross section of a tree, also known as a “tree cookie.” They discover how tree age can be determined by studying the rings and...

    1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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    Mount Holyoke College
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    This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo. Learners also think about how pheromones could be used to...

    $1 - $5 per group Ages 4 - 8 10 to 30 minutes

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