Test+1+-+Temperature

﻿Temperature Temperature- influeneces the overall quality of a body of water. Water temperature outside of normal range for a body of water can cause harm to the aquatic organisms. This is why the change in the temperature of the water over a part of the stream is measured. If the temperature of the water changes just a few degrees within a mile it is an indicater that there is thermal pollution going on.

Thermal Pollution- can be caused by human activities which is very affective to the water temperature. A lot of industries use river water in there processes. The water is to be treated before its returned to the river. When the water is returned to the river it is warmer due to the treating process. Another sourse of thermal pollution is runoff entering a stream from roof tops and parking lots because it is warmer which will increase the water tempreture. Trees are important to the health of a stream because it blocks out the sunlight which is a process of thermal pollution.

Water temperature is tested because it is an effect on solubility gases as in oxygen. You can determine how much gas is dissolved by the temperature of the water. Cold water dissolves more gas than warm water. Animals such as trout have a high level of dissolved oxygen; therefore, trout cant live to long in warm water. High water temperature can also cause a increase in the photosynthetic rate of water plants and algae. This increase can lead to over growth to the plants and algae, which can be harmful to the creature living in the stream. A simple change in water temperature can cause a affect to the general health of water organisms. Stream flow also has and affect on the water temperature. When streams are low and moving slowly this causes temperature to rise in the water. When temperature is too high trout have a low chance of living because warm water doesnt dissolve enough gas.


 * __Testing Procedure__-** To measure water temperature you need a temperature probe and a vernier interface. The water must be tested twice within a mile stretch of the stream. To record the temperature place the probe into the water as far away from the shore as you can get it on site one and site two. The probe should be at least 6 centemeters in depth to get a good reading. Leave the probe in the water for 10 seconds so the data can be collected. When the data is collected record the average temperature on the data and calculations sheet. After this is done test each site one more time and record it. This is how you measure the temperature of the water.

**__Temperature__**

__Stream or lake:__ Freeman Run __Date__ 5/11/11

__Site 1 Name__ Freeman Run __Time of day(Site 1):__10:38 AM _

__Site 1 number:__11.4 degrees celcious __Time of day (Site 2):__ 10:45 Am_ __Site 2 name:__ Freeman Run __Student name:__ Skyler, Gavin, Brandi _ __Site 2 number:__ 11.3 degrees celcious __Student name:__ Skyler, Gavin, Brandi __Distance between sites__: 1 mile _ __Student name:__ Skyler, Gavin, Brandi (°C) || Temperature 2 (°C) || Average Temperature (°C) || Temperature change (°C) || __** Column Procedure: **__ A. Record first water temperature reading at each site. B. Record second water temperature reading at each site. C. Average the water temperature at each site = (A + B) / 2 D. Temperature change = Average temperature Site 1 – Average temperature Site 2 Field Observations (e.g., weather, geography, vegetation along stream)__﻿__ .Site 1 Latitude- 41 37' 35" N
 * column || A || B || C || D ||
 * site || Temperature 1
 * 1 || 11.4 || 10.8 || 16.8 || o.15 ||
 * 2 || 11.3 || 11.3 || 16.95 ||  ||

Site 1 Longitude- 078 05' 28" W

Site 2 Latitude- 41 37' 32" N

Site 2 Longitude- 078 05' 22" W _ . __Test Completed: Date:__ 5/25/11