ACT 2026 Practice Test Science Scientific Investigation Free Quiz 1

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ACT 2026 Practice Test Science Scientific Investigation Free Quiz 1

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ACT 2026 Practice Test Science Scientific Investigation Free Quiz 1

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

General5 MCQs

1. Which of the following is a key component of a well-designed experiment?

A. Includes a control groupB. Uses only one trialC. Has multiple variablesD. Omits a hypothesis

2. A student investigates how temperature affects plant growth. The student measures the height of plants grown at 15°C, 20°C, and 25°C. What is the independent variable?

A. Plant growthB. Water amountC. TemperatureD. Light intensity

3. What is an essential characteristic of a scientific hypothesis?

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

4. A researcher studies the effect of light duration on the number of flowers produced by a plant. The researcher varies light hours and counts flowers. What is the dependent variable?

A. Light durationB. Water amountC. TemperatureD. Number of flowers

5. Why is it important to repeat experiments multiple times?

A. To increase reliabilityB. To save timeC. To reduce costD. To eliminate the need for a control

General5 MCQs

6. What is the best description of a scientific hypothesis?

A. It can never be proven false.B. It is based on opinion.C. It must be testable and falsifiable.D. It is always true.

7. What is the purpose of a control group in an experiment?

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

8. What is the best way to write a conclusion for a scientific investigation?

A. It should state personal opinion.B. It should ignore the data.C. It should always support the hypothesis.D. It should be based on the data and address the hypothesis.

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

A. Tests one independent variable at a timeB. Uses many independent variablesC. Does not include a controlD. Has no dependent variable

10. A scientist wants to test the effect of fertilizer on plant growth. She uses different amounts of fertilizer and measures plant height. What is the independent variable?

A. Plant heightB. Soil typeC. Amount of fertilizerD. Water amount

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Conducting Body: ACT Education Corp

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

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⚡ Test Pattern (Total: 171 MCQs):

English: 50 MCQs
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