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Eilidh
Problem Solving terms
| Question | Answer |
|---|---|
| What is a control experiment? | A standard for comparison proving that XXX is responsible for the result |
| How do you increase Reliability | Repeat the experiment and calculate an average |
| How do you increase Validity | Ensure that variable are kept constant TTCMPV |
| Why do you repeat experiments | To increase Reliability |
| Why do you calculate percentage change in mass | To eliminate any variation in starting mass |
| Why do you calculate dry mass | To eliminate any variation in water content |
| Why do you leave the experiment for 10 minutes before starting? | To allow time for......1. diffusion to take place, 2. enzyme to breakdown the substrate, 3. inhibitor to have its effect, 4. solutions to reach correct temperature, 5. pressures to stabilise |
| Why do you calculate average results? | To increase Reliability |
| How do you set up a control | Use the exact same apparatus in the exact same way but replace XX with water/dead cells/different enzyme etc |
| How do you calculate percentage change? | change/original x 100 |
| If you earn £80 in 4 hours what is your average earning per hour? | £20 per hour |
| Should you always include units with numbers? | YES |
| What is negative feedback? | A corrective mechanism where the response is in the opposite direction to the change detected. There is always a set point, a detection centre and a corrective mechanism. |
Created by:
nscobie