ACT 2026 Practice Test Science Experimental Design Free Quiz 3

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ACT 2026 Practice Test Science Experimental Design Free Quiz 3

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ACT 2026 Practice Test Science Experimental Design Free Quiz 3

Practice ACT 2026 Practice Test Science MCQs from Experimental Design. Get instant results with Explanation.

General5 MCQs

21. What is the role of the control group?

A. The group that receives the treatmentB. The group that does not receive the treatmentC. The group that is observed firstD. The group that is used for comparison

22. What is the difference between a theory and a hypothesis?

A. A theory is a guess.B. A theory is a single observation.C. A theory is the same as a hypothesis.D. A theory is a well-tested explanation.

23. What are constants in an experiment?

A. Variables that are kept constantB. Variables that are changedC. Variables that are measuredD. Variables that are not important

24. What is the difference between a field experiment and a laboratory experiment?

A. Field experiments are more reliable.B. Laboratory experiments are more realistic.C. Field experiments occur in natural settings, while laboratory experiments occur in controlled settings.D. Laboratory experiments are always better.

25. A student investigates how the amount of water affects the number of seeds germinated. What is the independent variable?

A. Number of seedsB. Amount of waterC. Soil typeD. Temperature

General5 MCQs

26. What is the relationship between a scientific law and a theory?

A. A law is a hypothesis.B. A law is an explanation.C. A law is a guess.D. A law describes a pattern, while a theory explains it.

27. An experiment tests the effect of salt concentration on the rate of osmosis. The researcher changes the salt concentration and measures the rate. What is the independent variable?

A. Concentration of saltB. Rate of osmosisC. TemperatureD. Type of membrane

28. What is a variable that is not intentionally included in an experiment but may affect the results?

A. Independent variableB. Dependent variableC. Confounding variableD. Controlled variable

29. Which group is used as a baseline for comparison?

A. The treatment groupB. The control groupC. The placebo groupD. The experimental group

30. What is the main advantage of a double-blind study?

A. It manipulates the independent variable.B. It increases the sample size.C. It controls all variables.D. It prevents bias.

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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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