When I taught 5th grade the curriculum called it "Biomes". Then in 2nd grade it switched to "Habitats". This year in 3rd grade we are to call them "Ecosystems". Regardless of the term, this is an EXCELLENT Webquest/Scavenger Hunt that will have your students researching, reading and navigating through a colorful and educational site! You can see how nicely organized the main page looks:
Let's say you wanted to learn more about the Desert Ecosystem. Click on the "desert" picture:
Students have to scroll up and down as well as use the side bar to find specific information.
Here is a FREE graphic organizer your students can use to take notes on each ecosystem:
