How much solar power was installed in the United States?

Grade level:  5th – 6th grades

Skills: rounding (decimal numbers)

Related environmental issues: Energy

The circle below shows how much new solar power was installed the United States each year between 2005 and 2015.

Round each number to the nearest tenth and hundredth.


Sources: REN 21, 2016

* Solar power means electricity generated by solar panels.


Answer keys


How much aluminum cans was recycled?

Grade level:  4th – 6th grades

Skills: Converting percents to fractions and decimals

Related environmental issues: Recycle

The bar graph below shows how many percent of plastic bottles, aluminum cans, glass bottles, and steel cans were recycled in the United States in 2014.


  1. Write down how many percent of each items were recycled. Then convert percents to decimals and fractions. Write fractions in simplest form.


  2. Look at the table you created in #1 and use <, > to show which number is larger.


Sources: “Advancing Sustainable Materials Management: 2014 Fact Sheet” published by the U.S. EPA in November 2016


Answer keys

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