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cells 3 practical
| Question | Answer |
|---|---|
| 1mm = ? | 1000um |
| 1um =? | 1000nm |
| why use a stain? | to make things visible (cell wall, nucleus) |
| steps of the practical using a microscope | 1. use a stain 2. get the specimen as flat & thin as possible 3. start on the smallest lens, focus, then move up a lens 4. Use a rule or eyepiece scale to measure size 5, use the equation |
| what is the equation you need to use? magnification = | magnification = image size divided by real size |
| steps of required practical for osmosis step 1 | 1. collect equipment |
| steps of required practical for osmosis step 2 | 2. measure 10ml of each solution |
| steps of required practical for osmosis step 3 | 3, pour into boiling tubes |
| steps of required practical for osmosis step 4 | 4. use cork borer to cut 5 potato cylinders |
| steps of required practical for osmosis step 5 | 5. use the scalpel to trim cylinders to same length |
| steps of required practical for osmosis step 6 | 6. weigh each cylinder and record masses in table |
| steps of required practical for osmosis step 7 | 7. place one cylinder in each tube |
| steps of required practical for osmosis step 8 | 8. tip solution and cylinder into beaker |
| steps of required practical for osmosis step 9 | 9. use tweezer and thoroughly dry cyclinders |
| steps of required practical for osmosis step 10 | re-weigh each cylinder and record new mass in table |
Created by:
Cabezablanca
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