1. Aim: How does an ecosystem maintain itself?
DO NOW:
List the abiotic factors in this ecosystem.
List the biotic factors in this ecosystem.

2. Requirements for a Self-Sustaining or Stable Ecosystem
Constant supply of energy
Q: Where does this energy come from?______________
Q: Is this energy recycled? __________
Plants making glucose, a simple sugar, which contains energy, by way of photosynthesis
Animals eating plants & animals eating animals getting energy from food
Recycling of materials, by decomposers, between organisms & their environment

3. Important Vocabulary
Producers or Autotrophs: organisms that make their own food Plants
Consumers or Heterotrophs: organisms that cannot make their own food  Animals
Decomposers: organisms (some bacteria and fungal organisms) that help decompose dead material and recycle materials back to the environment, in the process of decomposition aerobic process, so O2 is used

4. Energy
Producers contain the most energy & have the most energy available for transfer to the next higher level
Consumers receive ~10% of energy only 90% of energy is lost as heat energy and organisms also use this energy for life activities
Energy flows from producers to herbivores to carnivores

5. Energy

6. Energy Pyramid

8. Brain-Pop Video

9. Group-Work
Take the quiz on the video you have just viewed

10. Individual Work
If a producer has 1000 calories, how many calories will a consumer receive from eating it?

11. Homework
Read textbook pages 41 to 44 & answer questions 1, 2, and 4 on page 44
Questions and answers written out