Bella Word Scramble
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| Question | Answer |
| What is a control experiment? | A standard for comparison proving that XXX (independent variable) is responsible for the YYYY (result) |
| How do you increase Reliability | Repeat the experiment and calculate an average |
| How do you increase Validity | Ensure that variable are kept constant TTCMVP |
| 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 |
| How do you calculate a percentage | (portion/total )X 100 |
| How do you calculate a ratio | Identify the numbers and write them in the correct order, then find a number that they both divide by until the numbers cannot be further simplified. |
| Calculate the DIFFERENCE between.... | means subtract the numbers |
| By how many TIMES is X greater than Y? | Divide the big number by the wee number |
| What is the "independent variable" in an experiment? | It is the one you CHANGE and is plotted on the X axis |
| What is the "dependent variable" in an experiment? | It is the one you MEASURE and is plotted on the Y axis |
| In a table of results, where do you find the "independent variable"? | The first column of the table, and it is plotted on the X axis. |
Created by:
nscobie
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