1. Warm Up 9
3/24
Energy pyramids show the amount of _________ at each trophic level.
Only _____% of energy available in one trophic level is transferred to organisms at the next trophic level
The rest of the energy is released as _________.
4-7 Fill in the blank

2. Most common elements of LIFE
Hydrogen (H)- 59%
Oxygen (O)- 24%
Carbon (C)- 11%
Nitrogen (N)- 4%

3. How does matter move among the living and nonliving parts of an ecosystem?
Matters recycle within & between ecosystems in biogeochemical cycles
One way flow of energy

4. Nutrient Cycles
Nutrient: chemical substance that an organism needs to sustain life
Carbon
Nitrogen
- Phosphorous

6. Stored in: Atmosphere, Oceans, Underground
Carbon Cycle
Key ingredient of living tissues, found in rocks, component of animal skeleton, carbon dioxide gas
Stored in: Atmosphere, Oceans, Underground

8. Nitrogen Cycle Makes amino acid used to build protein
Makes up 78% of atmosphere
Stored in: Atmosphere, soil, tissue of animals

9. Nitrogen fixation- bacteria in the soil and on roots of plants called legumes convert nitrogen gas into ammonia Denitrification- Soil bacteria convert nitrates into nitrogen gas

10. Why is nitrogen cycle important?
Human activity add an abundance of nitrogen
Acid rain
Nitrous oxide destructs ozone
Waste water
Algal bloom

11. Nutrient Limitation When nutrients are scarce and cycle slowly
Primary productivity: rate at which organic matter is created by producers
When nutrients are scarce and cycle slowly
Large input of limiting nutrient can also happen. What is an example?

12. Stored in: Land, Atmosphere, Ocean
Water Cycle
Stored in: Land, Atmosphere, Ocean