SDStudyGuideDissolvedOxygen

=Project Search Study Guide= Water Test: Dissolved Oxygen

1.) How does dissolved oxygen get into the water? Photosynthesis

2.) Why is it important to the ecosystem? so animals can breathe.

3.) How do humans impact the levels of Dissolved Oxygen? sewage and fertilizer waist.

4.) What does it mean to fix the oxygen? Why did we need to do this? you have to test the water to fix it, to keep the oxygen from diffusing out

5.) What are some of the precautions you need to take in this lab? you need to wear safety goggles and wash your hands when your finished.

6.) What is titration? slowly added the liquid to it, drop by drop. observing for a change.

7.) How do you read a direct reading titrator? you read the line thats right above the tip of the rubber plunger.