UEN Security Office
Technical Services Support Center (TSSC)
Eccles Broadcast Center
101 Wasatch Drive
Salt Lake City, UT 84112
(801) 585-6105 (fax)
Main Curriculum Tie:
* For information on equipment for loan or for purchase, contact USU Water Quality Extension at (435) 797-2580 or www.extension.usu.edu/waterquality
Background For Teachers:
Temperature and oxygen were chosen for this activity because they are easy to measure, the causes of change are both varied and easy to understand, and also the two properties are related to each other. Fish and other animals living in water can be harmed by high temperatures and low oxygen concentrations. As water gets warmer the "saturation concentration" for oxygen gets lower – in other words the warmer the water, the less oxygen it can hold. Therefore, when water temperatures increase, fish are often hit with a double whammy of low oxygen as well. For more information about dissolved oxygen or temperature, see the Utah Stream Team Manual or the Further Discussion questions.
This lesson plan is designed to follow the activity What's in the Water?, during which the students measure several abiotic factors in a stream, or the lesson can be conducted as a stand alone.
Intended Learning Outcomes:
NOTE: If you have already done the activity What's in the Water? skip to field activity step five.
NOTE: these measurements must be taken at the stream site, as storing them will give an inaccurate measurement.
Be sure to point out that factors such as elevation and salt content will affect the ability water has to hold oxygen. At higher elevation, water holds less oxygen and salty water holds less oxygen.
This curriculum was made possible through funding from the Environmental Protection Agency, the United States Department of Agriculture, Cooperative State Research, Education, and Extension Service, the Utah Division of Wildlife Resources, and Utah State University Extension.
Additional resources can be found on the USU Stream Side Science 9th Grade Curriculum web page.
Created Date :