Match the following

• If this, then this statement. A possible explanation to a scientific question based on observations

• Hypothesis

• An attempt to explain what is happening/ has happened based on past experience or evidence

• Observation

• Using one or more of the five senses to gather information

• Inference

Match the following

• Factor in an Experiment that a scientist observes in response to the independent variable

• Experimental Group

• The group that receives the variable being tested and then can be used as a standard of comparison

• Independant Variable

• Factor in an experiment that a scientist purposely changes.

• Dependent Variable

• Group that does not receive the variable being tested and can be used as a standard of comparison

• Control Group

Sabrina wants to test which brand of popcorn pops the most kernels. She picked a Giant Eagle brand, Orville Redenbacher, and PopSecret. All three bags started with the same number of kernels. She popped each for 3 minutes in the same microwave, and then counted the number of kernels left over. What is her independent variable?

• Number of kernels left over

• Brand of popcorn

• Number of kernels before popping

• Length of time cooking

What is peer review?

• Polling random people to see if they agree with your experiment or not

• Asking your friends for help conducting an experiment

• Sharing the results of your experiment with others so they can examine and validate your conclusion

• None of the above

When designing a study, why is it important to use repeated trials?

• To ensure the study is completed quickly

• To increase the reliability of the results

• To reduce the number of variables

• To simplify data analysis

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Why might a scientific theory be modified over time?

• New evidence may emerge that supports a different explanation

• Theories are often incorrect

• Scientists prefer to change theories regularly

• Theories are based on opinions

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In a study to determine the boiling point of water at different altitudes, what would be a reason to conduct repeated trials?

• To ensure the water is pure

• To confirm the consistency of the results

• To use different types of water

• To test different altitudes

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A student is investigating the effect of different liquids on the rusting of iron. What is the best way to organize the data collected from this experiment?

• Write a detailed report

• Create a chart or table to compare the results

• Summarize the findings in a paragraph

• Discuss the results with classmates

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What two words should be in your hypothesis?

• I think

• If ...then...

• It will

• No idea

Two options below can be used to measure length.  PLEASE SELECT BOTH

• Ruler

• Graduated cylinder

• Meter stick

• Pipette