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Charting Biodiversity

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Ohio's PreK-12 Digital Library. Optimized by the Management Council.

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Download GreenSchools Investigations - Project Learning Tree

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Access each investigation individually below, or purchase a print copy of the complete set. Adult Leader Guide Learn about the benefits of becoming a GreenSchool, …

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Why is biodiversity so important? – TEACHFLIX

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Our planet’s diverse, thriving ecosystems may seem like permanent fixtures, but they’re actually vulnerable to collapse. Jungles can become deserts, and reefs can become lifeless rocks. What makes one ecosystem strong and another weak in the face of change? Kim Preshoff details why the answer, to a large extent, is biodiversity.

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Trees | Wild for Ohio | PBS LearningMedia

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Join naturalists Joshua and Erin as they explore the important role trees play in Ohio's ecosystems. Learn how trees provide food, shelter, and habitats for many animals and insects. Discover the history of Ohio's forests and the impact of invasive species. Find out why having different tree species is important for a healthy environment.

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Tree rings help scientists learn about past climates by decoding tree ring patterns. Use this interactive simulation to learn how tree ring patterns tell us about climate conditions in the past.

Click on Level 1 - Moisture in the interactive below to begin.

Use the Help button (with the "?" on it) in the lower left corner of each game level of the interactive to see instructions for that level.

Some Limitations of this Tree Ring Model

"All models are wrong... some models are useful." - George E.P. Box

Real tree ring cross-sections are not perfectly circular (and centered), or even symmetric, like the ones in this model.

Different types of trees have different responses in their growth rates to temperature and precipitation. Some thrive in warm conditions, while others grow quickly when it is especially wet.

Other variables (besides temperature and precipitation) influence growth rates of trees.

Real trees have a central section called the "pith"; this model starts right in with the first annual ring instead.

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Tree Rings Simulation - Dendrochronology

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Tree rings help scientists learn about past climates by decoding tree ring patterns. Use this interactive simulation to learn how tree ring patterns tell us about climate conditions in the past. Click on Level 1 - Moisture in the interactive below to begin. Use the Help button (with the "?"

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Trees for Kids | Learn all about trees in this fun educational video for kids

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Trees: Tree Truths | Science Trek | PBS LearningMedia

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Trees do more than make our world pretty. They are essential to life, providing us with oxygen, cleaning our water and air, protecting our soil and giving homes to 80 percent of the plants and land animals on Earth.

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Trees to the Rescue | PBS NC Science | PBS LearningMedia

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Explore the many ways that trees enhance urban environments with this animation.

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Trees Mean Business | Georgia Forests I | PBS LearningMedia

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Trees mean business in Georgia! Discover the ways that trees impact Georgia's economy, how they provide thousands of jobs across the state, and are managed sustainably.