Nice work!
Review your answers above to learn from any mistakes.
About This Drill
ACT Science — Research Summaries — Drill 1 is a Science practice drill covering Research Summaries. It contains 5 original questions created by Brian Stewart, a Barron's test prep author with over 20 years of tutoring experience.
ACT Research Summaries questions test your ability to understand experimental design and interpret results across multiple experiments. This drill presents three experiments on photosynthesis rate under varying light intensity, CO₂ concentration, and temperature, asking you to compare results and evaluate experimental reasoning.
Questions in This Drill
- According to Table 1, what was the photosynthesis rate when light intensity was 50%?
- Which of the following variables was held constant in both Experiment 2 and Experiment 3?
- Which of the following best describes the difference between the result patterns in Experiment 2 and Experiment 3?
- Suppose Experiment 1 were repeated with CO₂ concentration increased from 0.10% to 0.50%, while all other conditions remained the same. Compared to the original results in Table 1, the photosynthesis rate at 100% light intensity would most likely be:
- The students held light intensity and CO₂ concentration constant throughout Experiment 3. What was the most likely reason for this design choice?