What Are Consumers (Heterotrophs) in a Food Chain?

This video explains the role of consumers in an ecosystem and describes the difference between the various trophic levels (primary consumer, secondary consumer, tertiary consumer, quaternary consumer, apex consumer) to explain how energy travels up a food chain. Click this link for a reading passage and comprehension questions that go along with the video: www.teacherspa...
Graphics created by Clipartino (www.teacherspa..., used with permission.