Az Sci

Scientists frequently repeat the experiments of others scientists. Why is this important in science?

• Scientists often ask each other for help in performing experiments.

• Replication of experiments helps to confirm and verify results.

• Scientists frequently perform other scientists’ experiments in order to practice their technique.

• Repeating experiments is an effective way to make sure a laboratory is in optimal condition.

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NGSS.MS-LS2-4

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method

• recipe

• data collection

• metric system

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NGSS.MS-LS1-1

Kevin wanted to find out which of his toy cars, the Corvette or the Mustang, would roll downhill faster. He made a ramp by putting several books under one end of a board so that the board was slanted.
Which would be the best way for him to perform his experiment?

• Roll each car down the ramp separately five times and estimate which car looked faster.

• Roll both cars down the ramp together one time and see which one gets to the bottom first.

• Roll each car down the ramp separately one time, and time them with the second hand on his watch.

• Roll both cars down the ramp together five times and record which gets to the bottom first each time.

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

Scientists have MANY trials so their results are 

• countable

• graphable

• reliable

• hard to understand

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NGSS.MS-PS1-2

When a another scientist does someone's experiment to see if the results are valid?

• repetition

• replication

• experimental method

• controlled variable

Dr. Smith has been reading about another scientist’s research in a physics journal. He plans to do these experiments himself and see if he gets the same result.

• repetition

• replication

The factor in an experiment that will be changed. 

• dependent variable

• independent variable

• controlled variable

• inferences 

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NGSS.MS-PS2-2

The summary at the end of an experiment that explains the results, and referrers to the hypothesis using data. 

• conclusion

• procedures

• materials

• responding variable

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NGSS.MS-LS1-5

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. (not changed)

• experimental group

• control group

• data

• variables

The test of a hypothesis is called a

• control

• dependent variable

• conclusion

• experiment