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

 

Mickey-Mouse-Solar-Facility-Walt-Disney-World

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)

 

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Answer Keys

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

 

Which countries sold more electric cars in 2016, the United States or China?

Grade level:  3rd – 4th grades

Skills: Rounding

Related environmental issues: Energy & Climate Change

The number of electric vehicles (EVs)* on the road has been significantly increasing.   There were about 2 million electric vehicles running in the world in 2016. The table below shows the number of electric vehicles sold in five countries in 2016.

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  1. Round the number of EVs sold in Canada to the nearest hundred.
  2. Round the number of EVs sold in the United Kingdom to the nearest thousand.
  3. Round the number of EVs sold in Japan to the nearest 10 thousand.
  4. Round the number of EVs sold in the United States to the nearest 10 thousand.
  5. Round the number of EVs sold in China to the nearest thousand.

* Electric vehicles are exclusively powered by electricity like iPhones and can reduce the emission.

Sources: International Energy Agency, 2017. Global EV Outlook 2017 

 

Answer keys

  1. 11,600
  2. 38,000
  3. 20,000
  4. 160,000
  5. 336,000