Water Study

Robyn Saunders
Marconi Link, 6th Mount Pearl Brownies

Lake/Pond Study - Well, you could do pH readings on the water, oxygen analysis (as eutrophicated water has varying levels during the year depending on the algae blooms), nitrogen and phosphate readings - again at the onset of algal blooms. You could also do microbiology studies (coliforms should be abundant due to fecal/sewage contamination of lake) but you may need some supplies for that (m-Endo broth). It's really fun - I've done field studies (ocean not freshwater) but as long as you have the supplies or the chemical lab to analyze results the girls could have a lot of fun!!!! Phytoplankton and zooplankton net samples could be fun too (but best in the spring of the year). You would need a microscope to see some cool shapes!!!

Stream Study - measure flow rate of the stream (put something floatable in the water over a measured distance and calculate rate per minute or second - whatever), plant flora around the stream, fauna (pick up rocks in the stream and look under them - a polluted stream will have a lot of leeches), and at this time of the year there should be a lot of insect larvae overwintering in the streams. It might be interesting to check out what grows down under! I would suggest that you check the stream before you take the girls so they don't get discouraged. Finding things is more fun. You could do different parts of the stream to do some comparisons. Have fun!!!! Oh, a fast flowing stream may even have some freshwater sponges on the rocks (around here they are whitish-cream and green).

Another thing - take a water sample one week - put it in light for about a week and you will now have green water (algal growth).

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