Breanne's Watershed Blog Page

Temperature and Turbidity

The heat can affect the plants in the water. Heat is good for plants but too much heat can make them die. When they die they create decomposing bacteria, then the dead plants with use up all of the D.O. Then once all of the plants have died, the fish in the water won’t have oxygen and will eventually die.

Photosynthesis adds D.O. to the water but if the plants die that creates decomposing bacteria, which then uses up all of the D.O.

Some organisms need colder water to live in and if the water get’s too hot the organisms could die or they will move to colder water. If there are any organisms that need warm water and the water get’s too cold the same thing could happen.

Thermal pollution is when humans cause the body of water to change. For example if people dump their sewage in the water, then the water will get really warm and will get fecal coliform in it.

The water needs to be just the right temperature or plants will die creating bacteria, or they won’t grow and the fish won’t have any oxygen and they will die.

If the turbidity of the water is really murky and unpleasant looking it might have some bacteria in it. It also won’t be safe to drink or swim in it.

Pollution causes turbid water. Pollution can make water appear very gross and murky.

Fecal coliform is sewage. Sewage could make the water heat up and kill fish. If you swim in or drink sewage you could get very sick. Fecal coliform holds bacteria.

Fecal coliform comes from dumping sewage and farm fertilizer that washes up with runoff from storms.

People can stop pollution by not dumping their sewage in the river and not building crop fields by rivers and not throwing trash on the side of the road for runoff to catch.
Filtering Reflection 

Our experiment was fun and taught me what properties a good filter needs. My reaction to how clear some of the waters turned out was that I was shocked considering how the materials looked and reacted to the contaminated water. Setting up the experiment was fun because we had to make sure everything was exact, the only I didn’t like was having to keep my finger on the hole that we made for the water to flow through.

The ideal filter was a combined one we used which was a paper filter, some cheesecloth, and sand and gravel. The filter worked decently and barely had any particles in it. I would probably use better materials but for a prototype I would use this, I also would have to research good substitutes for those materials.

I would save time because you need lot’s of time to go through the process to create that one perfect filter. Also if you saved time you would get more time to get more money so you can get better materials. Time goes by so fast that you probably wouldn’t have enough materials even by the time you were 20. Time is the one thing we don’t have, we do but not enough.

With the sand and gravel I predicted that the sand would get swept up with the water, my prediction was correct, the water was swept up and there was a lot of sand in the ending product. My prediction for the cheesecloth was that it wouldn’t work that good and would only catch the bigger particles, my prediction was correct the filter only caught mulch and everything else was swept away. I predicted that the paper filter would work the best and I was correct the paper filter worked the best out of all of the individual filters. The best actually was all of them combined.

The first step was that we took our test tubes and added 20ml. of water in each tube. The second step is that we added the duckweed. Next we counted the fronds, then we put 1ml. of liquid fertilizer in each tube. The last step is that we placed all 4 tubes in a rack that we put under the growth lamp, to collect and analyze data.

Phosphorus Levels

In science we are learning how phosphorus affects the way plants grow. The way we are going to answer this question is by experimenting. The plant we are experimenting on is duckweed. Duckweed is a plant that prefers to grow in water than soil. So we added phosphorus to the plant to see how it grows, maybe it will grow faster or maybe it will grow slower. My prediction is that it will grow slower because thanks to some research one of my classmates shared was that phosphorus takes away the oxygen that plants need to grow. A trustable website to confirm this research is: this website is helpful with our investigation. Also if you add too much phosphorus the plant will grow and duplicate an extreme amount of times, you would need to add a just right amount keep it under control. We also read an article about the phosphorus levels in Lake Champlain. The article stated that the phosphorus comes mostly from agriculture and the second largest is the forest lands. This shows that Lake Champlain is full of phosphorus. Let’s hope that the lake get’s better.

Oxygen Levels

The other day in science we did a test for oxygen levels in Cedar Lake and our classroom aquarium with the guppies. The first test we did was with the Cedar Lake sample, we added iodide azide first and that allowed us to see the precipitant called flock, what I observed is that after we added the iodide azide it looked a bit foggy. Next we added manganous sulfate it made it look orange and clumpy. After that we added something else but i forgot what it's called and it made it darker. Next we added sodium thiosulfate and it got way clearer. With the aquarium sample first we added Iodide azide it looked yellow, it got clumpy too when you added manganous sulfate but it wasn't the same color it was a bit lighter. When you add the sodium thiosulfate it was clearer. OUr conclusion is that the aquarium and the pond water is not that healthy, few species of fish and plants can live in the water. I hope that the water get´s healthier in the future.


This weekend I saw some pollution. On October 20th I saw rain pooling on the road and washing away some oil that I saw. I saw a little but not that much, but I also saw water that was flowing down the parking lot and it had some bubbles in it. I also saw some non-point source pollution. The pollution I saw was a soda bottle outside of Pizza Putt. I also saw cigarette buds outside of walmart, although whenever I go there I see people smoking. I saw some point source pollution. The pollution I saw was actually me because me, my mom, and my brother, went to get materials for my costume and we drove around a lot and that makes smoke from the car spreading in the air which is polluting the air, but other cars were on the road too.


Land and water interact by runoff picking up trash. The trash that rivers can get from a runoff is from littering. But the litter is nonpoint source pollution because we don’t know who dropped the trash. Another example of nonpoint source pollution is if we see that oil is in a river but we don’t know where the oil came from. Point source pollution is when we can see that someone has done that pollution. If the pollution is from a factory that means that it is industrial use that is creating the pollution, but if someone’s sewage is going into the river that is called residential land use that’s creating that pollution. Pollution can come from many different places, and can happen in many different ways.

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