SOLAR ENERGY IN THE US

Grade level: 3rd – 5th grades

Skills: Addition & Subtraction (Decimal numbers)

Related environmental issues: Energy /  Renewable Energy

The table below shows shows how much new solar power was installed the United States each year between 2008 and 2017. Solar power means electricity generated by solar panels.

1 Gigawatt = 100,000,000 kilowatts (With 1 gigawatt of solar power, we can power 190,000 homes!)

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1. Which year has the largest number?

2. What is the difference between the numbers of the years 2014 and 2015?

3. Is the amount of solar panels installed in 2011 more than those installed in 2009 and 2010 combined or less?

4. What is the difference between the largest number and the smallest number?

5. Which year has the number 4.4 larger than  0.38?

6. Which two numbers make the largest value when added?

Sources:

 

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Answer keys

  1. 2016
  2. 7.5 – 6.24 = 1.26
  3. More : 1.92 > (0.38 + 0.85)
  4. 15.13 – 0.3 = 14.83
  5. 2013
  6. 15.13 and 10.61

 

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)