cm+study+guide+dissloved+oxygen

=Project Search Study Guide= Water Test: Dissolved Oxygen

1.) How does dissolved oxygen get into the water? the air and photosythesis

2.) Why is it important to the ecosystem?

3.) How do humans impact the levels of Dissolved Oxygen?

4.) What does it mean to fix the oxygen? Why did we need to do this?

5.) What are some of the precautions you need to take in this lab? to be careful incase you spill any alkaline pottasium iodide azide

6.) What is titration? when you add a liquid to another liquid and swirl it around at the same time

7.) How do you read a direct reading titrator? you look at the very bottom of the black line or the tip of the black spear like thing