Scientific Investigation - ACT Science
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What is a scientific investigation?
What is a scientific investigation?
A process scientists use to test ideas through experiments and observations.
A process scientists use to test ideas through experiments and observations.
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What is a hypothesis?
What is a hypothesis?
An educated guess that can be tested by an experiment.
An educated guess that can be tested by an experiment.
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What is the purpose of an experiment?
What is the purpose of an experiment?
To test whether a hypothesis is supported or not by collecting data.
To test whether a hypothesis is supported or not by collecting data.
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What is an independent variable?
What is an independent variable?
The factor that the scientist changes on purpose in an experiment.
The factor that the scientist changes on purpose in an experiment.
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What is a dependent variable?
What is a dependent variable?
The factor that is measured or observed for change.
The factor that is measured or observed for change.
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What is a control group?
What is a control group?
The group that does not receive the experimental treatment and is used for comparison.
The group that does not receive the experimental treatment and is used for comparison.
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What are constants?
What are constants?
Factors that stay the same in all groups of an experiment.
Factors that stay the same in all groups of an experiment.
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Why are constants important?
Why are constants important?
They ensure that only the independent variable affects the results.
They ensure that only the independent variable affects the results.
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What is a variable?
What is a variable?
Anything that can change in an experiment.
Anything that can change in an experiment.
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What does it mean to manipulate a variable?
What does it mean to manipulate a variable?
To intentionally change or adjust it in an experiment.
To intentionally change or adjust it in an experiment.
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What does “trial” mean in an experiment?
What does “trial” mean in an experiment?
One complete run or repetition of the procedure.
One complete run or repetition of the procedure.
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What is replication?
What is replication?
Repeating an experiment to verify results and improve reliability.
Repeating an experiment to verify results and improve reliability.
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Why is repeating experiments important?
Why is repeating experiments important?
It confirms results and reduces the impact of random errors.
It confirms results and reduces the impact of random errors.
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What is sample size?
What is sample size?
The number of subjects or data points tested in an experiment.
The number of subjects or data points tested in an experiment.
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Why does a larger sample size make results more reliable?
Why does a larger sample size make results more reliable?
It reduces the influence of outliers and random variation.
It reduces the influence of outliers and random variation.
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What is experimental error?
What is experimental error?
Small differences or mistakes in measuring or recording data.
Small differences or mistakes in measuring or recording data.
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What is a systematic error?
What is a systematic error?
An error caused by consistent mistakes in measurement or procedure.
An error caused by consistent mistakes in measurement or procedure.
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What is a random error?
What is a random error?
An unpredictable variation that affects measurements in no consistent way.
An unpredictable variation that affects measurements in no consistent way.
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What is bias in an experiment?
What is bias in an experiment?
A tendency that skews results because of unfair methods or assumptions.
A tendency that skews results because of unfair methods or assumptions.
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What does it mean if an experiment is valid?
What does it mean if an experiment is valid?
It accurately tests what it was designed to test.
It accurately tests what it was designed to test.
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