Practice Test Scientific Method Making Connections Labs

What is the last step of scientific method?

• hypothesis

• observe

• communicate

• question

You have made your educated guess, a hypothesis, now what do you do?

• Collect data

• Plan & perform your experiment

• Ask a question

• Analyze data

Tags

NGSS.MS-PS2-2

A student hypothesized that the pulse rates of his classmates would increase after walking. The student then obtained pulse rates from five classmates after they walked for 15 minutes. The data, in beats per minute, were recorded as: 78, 68, 84, 88, and 90. Identify one error in the experimental procedure.

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Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.

• recognize a problem

• test the hypothesis with an experiment

• form a hypothesis

• draw conclusions  

Tags

NGSS.MS-LS1-5

A student hypothesized that watching sports on television would cause viewers’ pulse rates to increase. She designed an experiment to determine the effect of watching sports on pulse rate. A group of 200 volunteers took their pulse rates and then watched their favorite sports on television. After the games, they immediately took their pulse rates again. The data collected showed that the pulse rates of some people increased, but the pulse rates of an equal number of people did not change. Although the hypothesis was not supported by the data, the hypothesis is still valuable because it

• may lead to further investigation

• can be changed to fit the data

• is the opinion of the experimenter

• is based on beliefs of the volunteers

Tags

NGSS.HS-ETS1-3

Once you are done with your experiment and have collected all of your data, you are ready to...

• Research your question

• Make a hypothesis

• Come to a conclusion & report your findings

• Analyze your data

Tags

NGSS.MS-LS1-5

This variable in an experiment is the one being changed by the scientist. 

• dependent variable

• independent variable

• data

• control group

Tags

NGSS.MS-PS2-2

Susan said, “If I fertilize my geranium plants, then they will have more flowers.”

• recognize a problem

• test the hypothesis with an experiment

• form a hypothesis

• draw conclusions

Tags

NGSS.MS-LS1-5

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.

The experimental results could be made more valid by

• increasing the number of students

• using safety precautions

• using a plastic clothespin

• making a bar graph of the data

  
  

What is the primary purpose of the scientific method?

• To prove a hypothesis

• To systematically investigate phenomena

• To collect random data

• To create complex theories

Tags

NGSS.MS-PS1-2