Potato salmon
Task:
Task:
- Cut out a 10.0g (+/- 0.2g) potato fish
- Dry it with a paper towel and weigh it (record this starting wt)
- Put it into a container of salt water (0, 25, 50, 75,100 or 125 % sea water)
- Leave them to "swim around" for a day or so
- Take out and re-weigh
- Gather every ones data
- Use excel to process (table, average % wt change, graph)
- Write up the method and results for this expt
- Find a diagram to explain osmosis
- Discuss the problems that fish like salmon face when they go from the river to the sea (& back).... OR..
- The problems periwinkles have when it rains
- Write a report on our potato salmon