TM+Dissolved+oxygen+study+guide

=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? animals need it to 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? to fix it, that means to test it, and you need to do it so that the oxygen wont diffuse out.

5.) What are some of the precautions you need to take in this lab? you need to wear safely goggles, and if needed wear cloves to prevent skin aggravation

6.) What is titration? slowly adding the liquid so you can see the reaction happen.

7.) How do you read a direct reading titrator? you look at the tip of the rubber plunger.