How many homes has Former President Jimmy Carter helped powering with clean energy?

Grade level: 4th – 6th grades

Skills: Multiplication (decimals)

sRelated environmental issues: Renewable Energy

Former President Jimmy Carter is a big supporter of renewable energy and helped a solar farm project which constructed as many as 3,850 of solar panels in his hometown in Georgia. He also installed 320 solar panels on the Jimmy Carter Presidential Library.

Jimmy-Carter-solar-farm-in-Plains-via-SolAmerica-570x326

Plains Solar Farm, Georgia (Photo: Futurism)

  1. Each solar panel can power 1.3 American homes. How many homes can the solar farm power?
  2. How many homes can the solar panels on the Library power?
  3. How many homes has Former President Jimmy Carter helped powering with clean energy?

 

 

Note 1) The Plains solar farm generates 55 million kilowatt hours per year.

Note 2) The average annual electricity consumption for a U.S. residential utility customer was 10,766 kilowatthours (kWh). (U.S. Energy Information Administration)

 

Note 3) The numbers were slightly modified. The actual numbers of solar panels are 3,852 and 324.

 

 

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Answer keys

  1. 5,005 homes    (3,850 x 1.3 = 5,005)
  2. 416 (320 x 1.3 = 416)
  3. 5,421 homes (5,005 + 416 = 5,421)

An Effect of rapidly melting permafrost

Grade level: 6th grades

Skills: Average 

sRelated environmental issues: Climate Change

It was reported that the temperature in the Arctic is the warmest in more than 10,000 years and it resulted in rapidly melting permafrost, soil that remains frozen year round. Due to the warmer temperature, the number of thaw slumps on Banks Island in Canada increased from 63 in 1984 to 4,077 in 2019. Those researchers predict that Banks Island will have 10,000 new slumps by 2085 if current climate warming continues.  Permafrost thaw could accelerate climate warming by releasing more CO2 into the atmosphere.*

Permafrost (Climate State)

  1. Between 1984 and 2019, how many did the number of thaw slumps increase per year on average? Round to the nearest whole number.
  2. Between 2019 and 2085, according to the prediction, how many will the number of thaw slumps increase per year on average? Round to the nearest whole number. 

*Note) Permafrost is soil that remains frozen year round. Due to its frozen state, organic matter in permafrost soils experience little decomposition by soil microbes. As a result, permafrost soils in high latitude ecosystems currently store twice as much carbon as is currently present in the atmosphere. More than 50% of global terrestrial carbon is stored in permafrost regions. Permafrost thaw stimulates the microbial decomposition of soil organic matter. This decomposition results in releasing more CO2 into the atmosphere.

 

 

 

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Answer keys

  1. 115    (4077-63) / (2019-1984) = 4014 / 35 = 114.6
  2. 90   (10000 – 4077) / (2085 – 2019) = 5923 / 66 = 89.7