BM+Study+Guide+Dissolved+Oxygen

=Project Search Study Guide =  Water Test: Dissolved Oxygen

 1.) How does dissolved oxygen get into the water? Through diffusion through the air, water through photosynthesis from the plants.

 2.) Why is it important to the ecosystem? An adequate amount of dissolved oxygen in water is essential for the good health of all aquatic life.

 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? To check the PH count. So we don't have extra oxygen added to the water.

 5.) What are some of the precautions you need to take in this lab? Wear goggles and tie up hair.

 6.) What is titration? Slowly adding a liquid to another liquid and observing for changes.

 7.) How do you read a direct reading titrator? For the glass ones, each black line is 2.2 parts per million.