Ecology
Biomes - explore the six different biomes on Earth: Freshwater, Marine, Desert, Forest, Grassland & Tundra.
Food Web & Food Chains - basic info about who eats who
Try building your own food webs or figuring out the mystery eater
Check out Unit 9 on Biology; Exploring Life's web site
"In the winter of 2006, a strange phenomenon fell upon honeybee hives across the country. Without a trace, millions of bees vanished from their hives, leaving billions of dollars of crops at risk and potentially threatening our food supply." PBS's Nature program made a documentary about this problem called Silence of the Bees. Watch it online.