Has the gasoline price changed over the years?

Grade level: 5th – 6th grades

Skills: Mean, mode, median and range

Related environmental issues:  Energy

The table below shows the average price of gasoline per gallon between 2013 and 2017 in the United States.  Find mean, mode, median and range.

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Sources: U.S. Energy Information Administration (2018) Retail Gasoline and Diesel Prices

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Answer keys

mean: 2.6

mode: 2

median: 2

range: 2

 

What are the Top 5 wind-powered states?

Grade level: 4th – 6th grades

Skills: Decimal numbers (addition and subtraction)

Related environmental issues:  Energy

The table below shows wind power capacity in the top 5 states in the United States by the end of 2017.

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  1. What state had the largest wind power capacity in the United States by the end of 2017?
  2. What is the difference between the largest and the smallest numbers?
  3. Which state had the wind power 2.4 gigawatts more than that in Kansas?
  4. What is the difference between the wind power in Iowa and that in California?

Sources: U.S. Department of Energy (2018) US Wind Power Cumulative Installed Capacity

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Answer keys

  1. Texas
  2. 17.54 (22.64 – 5.10 = 17.54)
  3. Oklahoma
  4. 1.7 gigawatts (7.31 – 5.61 = 1.7)