ACT 2026 Practice Test Science Scientific Reasoning Free Quiz 3

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ACT 2026 Practice Test Science Scientific Reasoning Free Quiz 3

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ACT 2026 Practice Test Science Scientific Reasoning Free Quiz 3

Practice ACT 2026 Practice Test Science MCQs from Scientific Reasoning. Get instant results with Explanation.

General3 MCQs

21. A student places potato cores in salt solutions and finds that the mass decreases in higher salt concentrations. What can be concluded?

A. Water moves into the potato.B. Water moves out of the potato.C. Salt has no effect on the potato.D. The potato absorbs salt.

22. A student hypothesizes that fertilizer promotes plant growth. The data show that plants with more fertilizer are taller. What can be concluded?

A. The hypothesis is rejected.B. The results are inconclusive.C. Fertilizer has no effect on plant height.D. The hypothesis is supported.

23. A student observes that plants grown in light have more leaves than those grown in dark. What can be concluded?

A. Light promotes leaf production.B. Light inhibits leaf production.C. Light has no effect on leaf production.D. The results are contradictory.

General3 MCQs

24. A table shows reaction rate at different enzyme concentrations: 0.1 → 2, 0.2 → 4, 0.3 → 5, 0.4 → 5.5, 0.5 → 6. What is the trend?

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

25. A gardener notices that plants with fertilizer produce more flowers than those without. What can be concluded?

A. Fertilizer inhibits flowering.B. Fertilizer promotes flowering.C. Fertilizer has no effect on flowering.D. The results are inconclusive.

26. A student measures the rate of respiration at different temperatures and finds that the rate increases with temperature. What is the relationship?

A. Negative correlationB. No correlationC. Exponential correlationD. Positive correlation

📋 ACT - Test Online Practice Quizzes

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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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