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What is an Experiment ?

• Information about the natural world gathered through the senses and/or scientific instruments.

• A scientific test or procedure that is carried out under controlled conditions to answer a scientific question.

• Measurements or observations collected and recorded in an experiment or investigation.

• A group in a scientific experiment that serves as a reference for comparison to the experimental group; a group that is untreated by the factor being tested.

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To Predict is to state what one thinks will happen under certain conditions based on data or observation.

• True

• False

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Measurements or observations collected and recorded in an experiment or investigation.

• Data

• Notes

• Answers

• Hash tags

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Information about the natural world gathered through the senses and/or scientific instruments.

• Data

• Observation

• Results

• Analyzing

A group in a scientific experiment that serves as a reference for comparison to the experimental group; a group that is untreated by the factor being tested.

• Control group

• Variable group

• hypothesis group

• I am Groot

An explanation based on evidence that is not directly observed.

• Inference

• Hypothesis

• Interaction

• Educated guess

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NGSS.MS-LS2-4

Jane is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. She sets up her investigation with 10 bean plants of equal size in each type of soil. 
What should Jane do each day to make sure she gets valid results?

• A.  Water only the plants in special potting soil.
• A.  Calculate the average plant height for each soil type.
• A.  Move the plants in ordinary topsoil to different locations.
• Estimate the height of each plant's stem and record the estimate 

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1)  Thomas and Julie wanted to find out which material would insulate their teacher's coffee cup and keep the coffee hot for the longest period of time. They first wrapped her cup with bubble wrap and recorded the temperature of the coffee once every 15 minutes for 2 hours. They repeated the investigation, this time using newspaper instead of bubble wrap, but they got the same results for both materials.  
What could they do to make sure their results are valid?

• Repeat their experiment.
• Use teas instead of coffee.
• Use a different thermometer.
• Conduct their investigation in a colder room. 

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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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Jonathan and Sarah have performed an experiment and are not sure their results are valid.
What should they do to check their results?

• average their data
• change their lab report
• perform a new experiment
• repeat the same experiment

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