“A Fish Tale” PowerPoint™ Questions Answer Key

Name:  _______________________________ Class Period:_____ Date:___________

1) The oxygen content of the air we breathe is 21%.

2) In an aquatic environment the oxygen content is constantly changing.

3) Algae, bacteria, fish and aquatic plants are dependent on dissolved oxygen for survival.

4) The temperatures in Florida’s lakes are usually warm because of our sub-tropical climate.

5) When aquatic organisms remove oxygen from the water and release carbon dioxide, it is known as respiration.

6) Plants, algae and some bacteria make their own food using a chemical process known as photosynthesis; the byproduct is oxygen.

7) If photosynthesis exceeds respiration, dissolved oxygen levels increase in water.

8) Lakes that have lots of plants and algae can have oxygen problems because of decomposition.

9) Wave and wind action on a water body can enhance the diffusion of oxygen from the air into water.

10) When dissolved oxygen levels get too low a fish kill can occur.

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A collaboration of the UF/IFAS Center for Aquatic and Invasive Plants
and the Department of Environmental Protection, Bureau of Invasive Plant Management.
HS/EA 4/26/07
SSS: SC.F.1.4, SC.G.1.4, SC.G.2.4, SC.H.1.4, SC.H.2.4, SC.H.3.4, LA.A.1.4, LA.B.1.4, LA.B.2.4