Phosphates 05/07

http://pondplace.com/phosphate-about.aspx

Summary: This week in class we learned about phosphates. Phosphates are what is used in fertilizer to make the plant grow faster. If it is dumped in to a lake then it help the algae (water plants) grow faster. If the algae grows faster it makes more oxygen but when it dies it takes away oxygen. If there is too much oxygen being taken away then the fish die off.

SP3: Planning and carrying out investigations
This week in class we did an experiment on phosphates. We tested water by putting it in a small container with another liquid. If the water was orange then it was okay but if the water is black then it is not okay. We also looked for bio indicators in the water, and we also looked at the bird populations over time.