1. Ecological Pyramids

2. How do autotrophs get their energy?

3. Autotrophs = Producers
Photosynthesis : Plants use sunlight to make glucose
Chemosynthesis:
Some bacteria use the energy stored in chemical bonds of sulfur compounds to make glucose
These live in remote places like deep ocean vents or hot springs and geysers

4. hot springs and ocean vents

5. Check for understanding: What is difference between chemosynthesis and photosynthesis? (use the paddle)

6. Ecological Pyramids
energy pyramid – shows energy flow through a food chain
2. biomass pyramid- shows the mass in grams
of organisms at each trophic level
3. numbers pyramid- shows the number

7. 1. Energy pyramid
Rule of 10 - only 10% of the energy is passed to the next level, the rest is used by the organism or lost as waste heat
calorie = amount of heat needed to raise the temperature of 1 g of water by 1 degree Celcius kcal = 1000 calories or 1 food calorie

8. 2. Pyramid of Numbers one oak tree, so the pyramid has a narrow base
3. Pyramid of Biomass
the tree has a large mass, so the pyramid has a wide base

9. Check for understanding: page 85: #6 & 7 (use the paddle)