I have learnt that this region of Pennsylvania has a lot of igneous metaphoric limestone rock and sandstone rock. The stream is perennial, meaning it flows all year round and a bedrock stream and has very little soil left, because it has been eroded and washed away. This stream got its shape from headward erosion, which is the lengthening of a river's course by erosion backwards from its source.

There are three types of erosion at work on this stream which we have seen, Physical,

With all this erosion taking place it is easy to see why there is little soil in this stream, the water cracks the rocks, allowing water to penetrate them, eroding away minerals and allowing tree roots in, and washing away these minerals and any soils downstream. The boulders are remnants of the underlying rocks broken by erosion and pushed down stream, these boulders also cause further erosion, when they are pushed by high water and slam into other boulders and the banks of the stream, at times changing the course of the streams flow. The more the rocks crack, the more erosion takes place as new areas of rocks are exposed to erosion. It would be interesting to return to the same spot 100 years from now to see the changes.

Chemical erosion occurs as streams water infiltrates into the r

Some common words found in the essay are:
Biological Chemical, Southwestern Pennsylvania, Youghiogheny River, , Science Class, erosion occurs, little soil, Cucumber Ravine, little soil left, rocks crack, erosion pushed, rock coal, chemical erosion, soil left,
Approximate Word count = 535
Approximate Pages = 2 (250 words per page double spaced)