AP Bio Quiz - Unit 0 - Experimental Design - Heather Kalenak | Library

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In a controlled experiment, researchers investigated the relationship between light intensity and the rate of photosynthesis in Spinacia oleracea (spinach) leaf discs. The discs were submerged in a bicarbonate solution and exposed to varying light intensities. The rate of photosynthesis was estimated by measuring the number of leaf discs that floated to the surface over 10 minutes, a proxy for oxygen production.

Which of the following best identifies the scientific question being tested in a study?

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Which of the following hypotheses would be considered the null hypothesis?

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Identify the independent variable in the scenario below

Scientists studied how pH affects the function of amylase, an enzyme that breaks down starch into simple sugars. In this experiment, identical amounts of starch solution and amylase enzyme are mixed in test tubes at different pH levels (3, 5, 7, 9, and 11). Each reaction takes place at a constant temperature and for the same amount of time. The amount of sugar produced is measured using colorimetric assay and recorded dafter 10 minutes. All other conditions (enzyme concentration, starch concentration, temperature, and time) are kept constant.

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Identify the dependent variable in the scenario below

Scientists studied how pH affects the function of amylase, an enzyme that breaks down starch into simple sugars. In this experiment, identical amounts of starch solution and amylase enzyme are mixed in test tubes at different pH levels (3, 5, 7, 9, and 11). Each reaction takes place at a constant temperature and for the same amount of time. The amount of sugar produced is measured using colorimetric assay and recorded dafter 10 minutes. All other conditions (enzyme concentration, starch concentration, temperature, and time) are kept constant.

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1

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day.
How could this experiment be improved using a control?

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Using no more than 1-2 sentences, justify your answer choice from question 5.

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Using the scenario in question 5 again assume the results showed that the pain reliever was very effective. Propose a possible scientific question for a follow-up study and justify.

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Both qualitative and quantitative data can be gathered in an experiment. Indicate which data type the following belong to by dragging them to the correct category.

weight loss of 2 kg
slimy texture
30°C
greenish hue

Quantitative
Qualitative

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AP Bio Quiz - Unit 0 - Experimental Design

Which of the following hypotheses would be considered the null hypothesis?

Identify the independent variable in the scenario below

Identify the dependent variable in the scenario below

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day. How could this experiment be improved using a control?

Using no more than 1-2 sentences, justify your answer choice from question 5.

Using the scenario in question 5 again assume the results showed that the pain reliever was very effective. Propose a possible scientific question for a follow-up study and justify.

Both qualitative and quantitative data can be gathered in an experiment. Indicate which data type the following belong to by dragging them to the correct category.

Increasing the sample size of a study could result in all of the following effects EXCEPT:

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day.
How could this experiment be improved using a control?