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


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)


TOP SUN-POWERED states in the United States

Grade level: 4th – 5th grades

Skills: Rounding

Related environmental issues: Renewable Energy

The table below shows how much solar power was generated from the top five solar power generating states in the United States in December, 2017.

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  1. Round the number of Nevada to the nearest hundreds.
  2. Rounded to the nearest tens, will North Carolina and Arizona have the same number or not?
  3. The number of which state becomes 200 when rounded to the nearest hundreds? List all.
  4. When rounded to the nearest ______, the number of California becomes 2,000.  A) ones B) tens C) hundreds D) thousands



The 5MW-Walt Disney World Solar Facility near the Walt Disney World Resort. (Orlando Sentinel)


Sources: U.S. Energy Information Administration, 2018. Electric Power Monthly (Table 1.17.A. Net Generation from Solar Photovoltaic)



Answer Keys

  1. 200
  2. Yes.  Both numbers are rounded to 340
  3. Nevada and Texas
  4. D