2. Hosted Tabin Vrbin

3. AAAA AAAA BBBB BBBB DDDD DDDD CCCC DDDD FabulousFunFrisky Joey O.C. AAAA CCCC CCCC CCCC BBBB DDDD BBBB AAAA EEEE EEEE EEEE EEEE

4. Row 1, Col 1 A system that uses LIVE microrganisms and their enzymes to filter waste from the surroundings is called a(n) What is a BIOFILTER

5. 1,2 True or False: Energy is recycled in an ecosystem. (What is False: Materials such as atoms are recycled.)

6. 1,3 Adding water to your ecosystem Simulated what part of the water Cycle? What is precipitation?

7. 1,4 A sudden increase in plant biomass Is most likely due to an increase in what two nutrients? What are nitrates and phosphates?

8. 2,1 Adding what organisms would Quickly reduce the amount of excess Nitrate or phosphate in a pond ecosytem? What are plants/algae?

9. 2,2 Which nutrient cycle does not have An atmospheric gas phase? What is phosphorus?

10. 2,3 List three abiotic factors monitored in your pond ecosystem: What are nitrate, nitrate, ammonia, pH, temp, water clarity, ect?

11. 2,4 What organism is your primary producer In the pond ecosytem? What are plants/algae???

12. 3,1 What form of nitrogen is non-toxic To your fish? What is nitrate (and nitrogen gas)?

13. 3,2 When carbon dioxide dissolves in Water, an ______ is formed that Lowers the pH. What is acid (carbonic acid)?

14. 3,3 True or False: The bacteria responsible for the nitrogen Cycle in the pond ecosystem are Aerobic bacteria. What is true?

15. 3,4 At every step in the food chain, energy Is lost in the form of _________. What is heat?

16. 4,1 If the temperature in a pond increases, The levels of dissolved oxygen gas should _________. What is decrease???

17. 4,2 What organisms in your tank can Perform both cell respiration and Photosynthesis? What are plants/algae?

18. 4,3 What type of sediment was mainly Chosen to act as a buffer when dissolved In water? What is limestone?

19. 4,4 True or False: Limestone acts as an alkaline buffer Against the potential acidic conditions Produced from the process of Cell respiration. What is TRUE: (cell respiration releases carbon dioxide gas)

20. 5,1 Which organisms in your pond Produce the greatest amount of Ammonia? What are fish (in their urine)?

21. 5,2 Ammonia produces alkaline conditions. Why is limestone NOT a good buffer Against this process? Limestone is also alkaline…only an acid could neutralize a base?

22. 5,3 What 2 life process control the Levels of carbon dioxide in your pond Ecosystem? What are cell respiration and photosynthesis?

23. 5,4 What is the number one limiting Factor to the population size In your ecosystem? Is this density dependent or Density independent? What is space; density independent)