Textbook Series: Prentice Hall Science
| Textbook Topics | Related Links |
| 1-1 Living Things and Their Environment | World Book: Earth in Balance |
| 1-2 Food and Energy in the Environment | Audubon Society |
| 1-3 Interaction and Evolution | Grand Canyon National Park |
| 1-4 Life in the Balance | Yellowstone Ecosystem Studies |
| Planet Earth | |
| Environet | |
| The Sonoran Desert Under Assault | |
| Garbage | |
| Sierra Club | |
| Rainforest Action Network |
| Textbook Topics | Related Links |
| 2-1 Cycles in Time: Rhythms of Life | Desert Survival |
| 2-2 Cycles of Matter | Amazon Life |
| 2-3 Cycles of Change: Ecological Succession | Matter in Ecosystems |
| Nutrient Cycles in the Soil |
| Textbook Topics | Related Links |
| 3-1 Biogeography | The Evergreen Project Adventures |
| The Biosphere | |
| Iowa Prairie Network | |
| World Biomes | |
| Biomes | |
| Exploring the Biomes of the World & How Humans Effect Them | |
| United States Biomes | |
| Ecosystems and Biomes | |
| Biomes 2 |
Chapter
1 Interactions Among Living Things
Chapter
2 Cycles in Nature
Chapter
3 Exploring Earth's Biomes