1. Energy Flow through Ecosystems

2. Qn What does the arrow show us?

3. Some Food Chains Use the organisms below to make some food chains

4. Some Bigger Questions about Food chains. What does the arrow on a foodchain show? Why do most food chains have less than 5 trophic levels? Why is it relatively more energy efficient for humans to be herbivores rather than being omnivorous or carnivorous?

5. Food Chain Food web Producer Consumer Herbivore Carnivore Decomposer Ecosystem Trophic Level Some useful ecological definitions you should know