Friday, 13 July 2012

Osmosis prac write-up

Today we will be completing some work from last lesson on th osmosis practical we did.  In a word document, include information under the following headings:
Aim:
Briefly explain what we wanted to investigate in this test.
Materials and Methods:
Use this link to jog your memory, but don't wory too much about the small details as we are focusing more on the discussion and conclusion.
Results:
briefly explain what we observed during the practical, using the table from page 3 if you don't have a complete set of results.
Discussion:
  • Explain the overall pattern in the results we collected, making note of any anomalies.  What might have caused these?
  • Use the graph on page 4 of the report to estimate at what salt % the potato would have stayed the same weight. What does this mean about the concentration of salt inside the potato?
  • If there was no change in mas, does tht mean no water at all was moving in either direction? Use the term 'dynamic equilibrium' in your answer.
Once you've finished and saved/printed your work, try this activity to do with mitosis . There is also some information here which might be helpful.
There are also some activities here relating to mitosis in the brain and a game based on mitosis.

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