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.

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...

In this phytoplankton worksheet, students read and study online information on plankton blooms to answer 8 short answer questions about the topic.