Problem Solving terms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is a control experiment? | A standard for comparison proving that XXX (independent variable) is responsible for the YYYY (result)
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| How do you increase Reliability | Repeat the experiment and calculate an average
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| How do you increase Validity | Ensure that variable are kept constant TTCMVP
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| Why do you repeat experiments | To increase Reliability
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| Why do you calculate percentage change in mass | To eliminate any variation in starting mass
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| Why do you calculate dry mass | To eliminate any variation in water content
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| 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
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| Why do you calculate average results? | To increase Reliability
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| 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
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| How do you calculate percentage change? | change/original x 100
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| If you earn £80 in 4 hours what is your average earning per hour? | £20 per hour
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| Should you always include units with numbers? | YES
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
nscobie
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