Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Freshwater Snail Populations Investigation Aim: I aim to investigate how the flow rate of a stream affects the distribution of freshwater snails. Prediction: Freshwater-snails are a type of mollusc; they graze on algae encrusting the stones of the streambed. They have a spiralled, streamline shell that helps them to move more easily through the water against stronger currents. Algae grow in a large supply in well-oxygenated water where the oxygen is trapped by flying water in the fast current. The algae cling to stones where the fast water sweeps away all the mud from the seabed, leaving bare stones. The snails have adapted to their lifestyle with their streamlined shell for gliding against the current. If the temperature becomes too cold, then the snails will not feed and become inactive, as they are cold-blooded. I predict that the snails will be found in the faster stretches of the stream, (where the bare algae encrusted...

To see the full version of this document, and 145,841 others