DDStudy+giude+Dissolved+Oxygen

=Project Search Study Guide= Water Test: Dissolved Oxygen

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

2.) Why is it important to the ecosystem?

so the animals can breath.

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 first to fix it, we had 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 hands after touching the water, or acids

6.) What is titration? you are slowly adding the liqueid, drop by drop so you can notice the differnce.

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