Crash Course: Ecology- links in the chain

1. in an ecosystem, energy means

2. The size and scope of an ecosystem has a lot to do with the amount of things like ____?

3. If a cricket has 1 calorie of energy, it needed to eat ____ calories of energy from lettuce or something.

4. Organisms only hold onto ____% of the energy they ingest.

5. It’s safest to eat ____ on the food chain.

6. Things higher on the food chains can higher lower concentration of toxics. (Circle one.)