NGSS.3-5-ETS1-3

When conducting an experiment, in order to get reliable results, it is important to:

• Disregard results that do not match your hypothesis
• Test many different variables at the same time
• Test all forces at the same time
• Repeat the investigation several times

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NGSS.3-5-ETS1-3

When designing an experiment, why is it important to test only one variable?

• Testing one variable explains what  caused the change once data has been gathered.
• Testing one variable collects inaccurate data and repeats the investigation more than necessary.
• Testing one variable decreases the reliability of the investigation.
• It is not necessary to test only one variable.

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NGSS.3-5-ETS1-3

Why did each group test the amount of drops of water a penny could hold before changing their variable?

• It provides more data to include in a lab report
• It ensures that the hypothesis will be correct
• It adds an independent variable to the experiment.
• It is the control and serves as the basis for comparison

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NGSS.3-5-ETS1-3

How many variables should be changed in an experiment?

• ONE
• TWENTY
• THREE
• TEN

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NGSS.3-5-ETS1-3

Testing a hypothesis often involves a(n):

• answer
• experiment
• problem
• safety check

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NGSS.3-5-ETS1-3

The students measure how far the toy car rolls on the floor. What should the students do to determine if their results are reliable?

• Roll different toy cars down the ramps for three trials.
• Roll the same toy cars using ramps with five books and six books.
• Roll the same toy car down the ramp for three trials.
• Roll different toy cars using ramps with five books and six books.

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NGSS.3-5-ETS1-3

How many variables should a scientist change with each new experiment?

• 1
• 2
• 3 or more
• as many as he wants to

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NGSS.3-5-ETS1-3

Which brand of battery last the longest?

• Testable

• Not testable

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NGSS.3-5-ETS1-3

The _______________ during an experiment is what changes or is different.

• hypothesis

• conclusion

• variable

• conclusion

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NGSS.3-5-ETS1-3

The ONE thing you change in an experiment.

• constant variable

• controlled variable

• dependent variable

• independent variable

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NGSS.3-5-ETS1-3