How much recycled newspaper will save a tree?

Grade level: 4th – 5th grades

Skills: Fraction (multiplication/division)

Related environmental issues: Reduce/Reuse/Recycle

 

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Recycling paper prevents many trees from being cut down for paper. It is estimated that we can save one tree by recycling a stack of newspaper 3 feet high.

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  1. Sean recycled a stack of newspaper 23 feet high.  How many trees did Sean save by recycling the newspaper? Answers must be fractions in mixed numbers.
  2. To save 13 1/6  trees, a stack of how many feet of newspaper Does Sean need to recycle?  Convertfractions into mixed numbers.
  3. Maya wants to save 18 2/3trees. She gathered newspaper to recycle and made a stack of newspaper 55 feet high.  Did she gather enough newspaper? Explain.

 

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Source: Recycle Across America, Recycling facts


Answer keys

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What state generates the largest solar power in the United States?

Grade level: 5th – 6th grades

Skills: Circle graph & Fraction 

Related environmental issues: Renewable Energy

The circle graph 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. What state generated larger amount of solar power than the rest of the states combined?
  2. What state generated as much solar power as North Carolina?
  3. What state generated one seventh as much solar power as California?
  4.  What state generated one fourth as much solar power as North Carolina and Arizona combined?

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. California

2. Arizona

3. Nevada    42 ÷ 7 = 6

4. Texas    8 + 8 = 16    16 ÷ 4 = 4