HE+Study+Guide+Dissolved+Oxygen

=Project Search Study Guide= Water Test: Dissolved Oxygen

1.) How does dissolved oxygen get into the water? Diffusion through the air and into the water by photosynthesis through the plants.

2.) Why is it important to the ecosystem? So that the aquatic animals can breathe.

3.) How do humans impact the levels of Dissolved Oxygen? Sewage and fertilizer waste.

4.) What does it mean to fix the oxygen? Why did we need to do this? Keeping the Oxygen contained in the bottle. So that it doesn't diffuse with extra oxygen.

5.) What are some of the precautions you need to take in this lab? You need to wear goggles and gloves so that it doesn't get on your hands.

6.) What is titration? Slowly adding the liquid to another liquid and observe the changes, don't push the plunger all the way.

7.) How do you read a direct reading titrator? From the bottom of the plunger and each division is 2.2.