Leaves fall off the tree in the autumn, but why do they change colors? The interactive covers the role of chlorophyll and photosynthesis. It also explains both carotenoids and anthocyanins.

Test the class's knowledge of the key components of climate change. A 10-question online quiz asks learners about weather, climate, greenhouse gases, and several other concepts related to climate change. Interactive and easy for...

In this biomes worksheet, students use an on line source to complete a table of the Earth's biomes. Students include the types of plants in each biome, the types of animals, the climate and any details about the biomes. Students answer...

For this energy worksheet, students click on the links in the questions about energy to find the answers to the questions and then come back and answer the questions. Students answer 12 questions total.