ACT 2026 Practice Test Science Research Summaries Free Quiz 3

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ACT 2026 Practice Test Science Research Summaries Free Quiz 3

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ACT 2026 Practice Test Science Research Summaries Free Quiz 3

Practice ACT 2026 Practice Test Science MCQs from Research Summaries. Get instant results with Explanation.

General4 MCQs

21. In an experiment on osmosis, the researcher changes the salt concentration and measures the rate of water movement. What is the independent variable?

A. Rate of osmosisB. Salt concentrationC. TemperatureD. Type of membrane

22. Two experiments track bacterial population over time. Trial 1: rapid increase then plateau. Trial 2: slow increase then decrease. How do the trends compare?

A. Both trials show the same trend.B. Trial 1 shows a decrease, Trial 2 shows an increase.C. Both trials show a constant population.D. Trial 1 shows a rapid increase then stabilization, while Trial 2 shows a slow increase then decline.

23. A table shows crop yield (kg) with different fertilizer amounts: 0 → 30, 25 → 45, 50 → 55, 75 → 40, 100 → 25. What is the optimal fertilizer amount?

A. 50 kgB. 25 kgC. 75 kgD. 100 kg

24. A table shows the time for a reaction to complete at different temperatures: 20°C → 60 s, 30°C → 40 s, 40°C → 30 s, 50°C → 20 s. What is the relationship?

A. Time increases with temperature.B. Time is independent of temperature.C. Time decreases as temperature increases.D. Time fluctuates with temperature.

General3 MCQs

25. A researcher grows two groups of plants, one in light and one in dark. The light-grown plants produce 20 flowers, the dark-grown plants produce 0 flowers. What can be concluded?

A. Light is not necessary for flowering.B. Light is necessary for flowering.C. The plant in the dark produces more flowers.D. The results are inconclusive.

26. A table shows photosynthesis rate (arbitrary units) at different light intensities: 100 → 10, 200 → 18, 300 → 24, 400 → 28, 500 → 30, 600 → 30. What is the trend?

A. Rate increases linearly with light intensity.B. Rate decreases with light intensity.C. Rate is independent of light intensity.D. Rate increases, then levels off.

27. A table shows enzyme activity (units) at different temperatures: 20 → 20, 40 → 80, 60 → 50, 80 → 10. What is the optimum temperature?

A. 40°CB. 20°CC. 60°CD. 80°C

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Conducting Body: ACT Education Corp

Frequency: 7-8 Times per Year | Time: 165 Minutes

Negative Marking: No

⚡ Test Pattern (Total: 171 MCQs):

English: 50 MCQs
Math: 45 MCQs
Reading: 36 MCQs
Science: 40 MCQs

Merit Formula: Merit_calculation = University/College Specific Weightage = Not Fixed Score_range = 1–36

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