ACT 2026 Practice Test Science Variables and Controls Free Quiz 2

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ACT 2026 Practice Test Science Variables and Controls Free Quiz 2

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ACT 2026 Practice Test Science Variables and Controls Free Quiz 2

Practice ACT 2026 Practice Test Science MCQs from Variables and Controls. Get instant results with Explanation.

General5 MCQs

11. What are controlled variables?

A. Variables that are changedB. Variables that are kept constantC. Variables that are measuredD. Variables that are not important

12. What is a characteristic of a well-designed experiment?

A. Uses multiple independent variablesB. Does not include a controlC. Does not control variablesD. Has only one independent variable and a control

13. A student investigates how the amount of water affects seed germination. What is the independent variable?

A. Amount of waterB. Number of seedsC. Soil typeD. Temperature

14. A scientist tests the effect of temperature on bacterial growth. What is the dependent variable?

A. TemperatureB. Light exposureC. Number of bacteriaD. Nutrient concentration

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

A. To manipulate the independent variableB. To reduce biasC. To increase sample sizeD. To measure the dependent variable

General4 MCQs

16. Why is replication important in an experiment?

A. To change the experimentB. To analyze dataC. To report resultsD. To increase reliability

17. What is the control group?

A. The group that receives no treatmentB. The group that receives the treatmentC. The group that is observed firstD. The group that is used for comparison

18. What is a key characteristic of a scientific hypothesis?

A. It is always correct.B. It is a general statement.C. It must be testable.D. It is a conclusion.

19. A researcher studies the effect of light duration on flower production. What is the dependent variable?

A. Light durationB. Number of flowersC. Water amountD. Temperature

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