Table of Contents Water Quality Testing PROCEDURE
Part I: Think Like A Scientist Classroom - 20 minutes
1. Review with students what they have learned about wind as a sailor and as scientists. In Chapter 4 of Learn Sailing Right Beginner! we also learn about water and water movement.
2. Today we will take a closer look at our local waters and the water movements as a sailor and a scientist.
3. Write the word “water” on the board. Ask students about water, “What do we know about water? Is water import to humans and animals? What attributes do scientists look at when testing and measuring water?”. Scientists look at temperature, pH, specific gravity, phosphorus, nitrates and turbidity (List on board).
4. Ask students why scientists would test these attributes? Guide students to correlate food chains, algae, plankton, and the effect of water quality on local species of fish and animals. For example: If you have had heavy rains that drastically change the water temperature or amount of oxygen may result in a fish kill (when large amounts of fish die.) Another example is an algae bloom related to a change in ph levels in the water, some algae blooms are called red tides.
5. Ask students if aspects of water quality, such as temperature, could change over time. Have them brainstorm possible explanations for their answer. See if the students can think of any connections between water quality and sailing.
6. Using a bucket of tap water, model how to test and record water temperature reviewing how temperature is recorded in degrees Fahrenheit or degrees Celcius. Next, have a student volunteer help you test salinity and specific gravity using a hydrometer review that salinity is measured in parts per thousand. Finally, measure pH levels and turbidity. Post all results on the board.
7. Another option is to have students change the water attributes by adding silt and salt to different samples.
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