Crash Course
Crash Course Kids 7.1: Fabulous Food Chains
In this episode of Crash Course Kids, Sabrina talks about the way energy moves, or flows, through an ecosystem and how that movement forms food chains. [2:46]
Crash Course
Crash Course Kids 21.2: Food Webs
Last time we put a polar bear in the desert and we still feel bad about that, but there's a lot more going on in ecosystems than just temperature. In fact, there are so many elements in ecosystems, that if just one leaves or gets out of...