ACT 2026 Practice Test Science Experimental Design Free Quiz 1

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ACT 2026 Practice Test Science Experimental Design Free Quiz 1

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ACT 2026 Practice Test Science Experimental Design Free Quiz 1

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

General5 MCQs

1. In an experiment, what is the treatment group?

A. The group that receives a placeboB. The group that receives the treatmentC. The group that is observed without any interventionD. The group that receives a different treatment

2. What is the purpose of a placebo in a clinical trial?

A. It is the independent variable.B. It is the dependent variable.C. It is an active treatment.D. It is an inactive substance used as a control.

3. An experiment tests the effect of temperature on enzyme activity. The researcher changes the temperature and measures the reaction rate. What is the independent variable?

A. TemperatureB. Enzyme activityC. pHD. Substrate concentration

4. Why is a control group included in an experiment?

A. To receive the treatmentB. To test a different hypothesisC. To serve as a baseline for comparisonD. To introduce additional variables

5. What is the purpose of random assignment in an experiment?

A. To manipulate the independent variableB. To eliminate confounding variablesC. To increase sample sizeD. To measure the dependent variable

General5 MCQs

6. What are confounding variables?

A. The independent variableB. The dependent variableC. Controlled variablesD. Variables that could affect the results

7. What is the advantage of a double-blind experiment?

A. To reduce biasB. To increase the sample sizeC. To manipulate the independent variableD. To control all variables

8. In an experiment, what is the difference between the experimental group and the control group?

A. The group that receives no treatmentB. The group that receives a placeboC. The group that receives the treatmentD. The group that is observed last

9. What does it mean to replicate an experiment?

A. Changing the procedureB. Repeating the experimentC. Analyzing dataD. Reporting results

10. What is a variable in an experiment?

A. A hypothesisB. A constant factorC. A conclusionD. A factor that can change

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