Experimental Design - Honors

Anthony worked in the produce department of a grocery store in the afternoons. He wondered how much the ripeness of bananas affected the sale of the fruit. He collected data for 10 days on the total number of pounds of bananas sold of green, yellow, and brown-black bananas.

The independent variable is...

• The weight of banana sales

• The time of day for the sales

• The color of bananas

• The average weight of bananas sold

Tags

NGSS.MS-LS2-1

Anthony worked in the produce department of a grocery store in the afternoons. He wondered how much the ripeness of bananas affected the sale of the fruit. He collected data for 10 days on the total number of pounds of bananas sold of green, yellow, and brown-black bananas.

The dependent variable is...

• The weight of banana sales

• The time of day for the sales

• The color of bananas

• The average weight of bananas sold

Tags

NGSS.MS-LS2-1

Anthony worked in the produce department of a grocery store in the afternoons. He wondered how much the ripeness of bananas affected the sale of the fruit. He collected data for 10 days on the total number of pounds of bananas sold of green, yellow, and brown-black bananas.

What was held constant in this experiment?

• Selling bananas at different levels of ripeness

• Selling 20 pounds of bananas

• Selling bananas at the same store in the afternoons

• Selling bananas on mornings only

Tags

NGSS.MS-ETS1-1

Anthony worked in the produce department of a grocery store in the afternoons. He wondered how much the ripeness of bananas affected the sale of the fruit. He collected data for 10 days on the total number of pounds of bananas sold of green, yellow, and brown-black bananas.

What conclusion can be made by considering the data Anthony collected?

• Banana sales were unaffected by ripeness

• Bananas with most ripeness (brown-black) sold best

• Bananas with least ripeness (green) sold best

• Bananas with medium ripeness (yellow) sold best

Tags

NGSS.MS-LS2-1

Anthony worked in the produce department of a grocery store in the afternoons. He wondered how much the ripeness of bananas affected the sale of the fruit. He collected data for 10 days on the total number of pounds of bananas sold of green, yellow, and brown-black bananas.

What can be done to make the experiment more valid?

• Test only a single ripeness level of bananas

• Include a placebo group

• Perform the experiment in a different country

Carlos wants to determine which exercise increases heart rate the most. He recorded the pulse rates of five people, had each of them do a different exercise for 10 minutes, then recorded their pulse rates again.

Which option best summarizes the variables?

• 
• 
• 
• 

A student wants to conduct an experiment to determine the windiest area of her neighborhood.

Which of the following procedures would be the fairest test?

• Take wind measurements in five different areas in the neighborhood on the same day, using the same measurement method.

• Take wind measurements in five different areas in the neighborhood, each on a different day, using the same measurement method.

• Take wind measurements in two different areas in the neighborhood on the same day, using different measurement methods.

• Take wind measurements in two different areas in the neighborhood each on a different day, using different measurement methods

Tags

NGSS.MS-ESS2-5

Santo wanted to determine which brand of popcorn has the most popped kernels in a single bag. He used six different brands of popcorn for his experiment. After each bag was popped, he counted the number of popped kernels and unpopped kernels.

What was the independent variable?

• Brand of the microwave oven

• Brand of the popcorn

• Number of popped kernels

• Number of unpopped kernels

Santo wanted to determine which brand of popcorn has the most popped kernels in a single bag. He used six different brands of popcorn for his experiment. After each bag was popped, he counted the number of popped kernels and unpopped kernels.

What was the independent variable?

• Brand of the microwave oven

• Brand of the popcorn

• Number of popped kernels

• Number of unpopped kernels

Santo wanted to determine which brand of popcorn has the most popped kernels in a single bag. He used six different brands of popcorn for his experiment. After each bag was popped, he counted the number of popped kernels and unpopped kernels.

What was the dependent variable?

• Brand of the microwave oven

• Brand of the popcorn

• Number of popped kernels