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)

How much energy & money do LED lamps save?

Grade level: 4th – 5th grades

Skills: Multiplication

Related environmental issues: Energy conservation

The table below shows how much electricity each light bulb uses to light your room in 1 year.

Screen Shot 2018-11-03 at 9.18.30 AM

  1. Your house has 30 light fixtures.  How much electricity do you use during a year if you use a regular light bulb for each light fixture?
  2. How much electricity do you use during a year if you use an energy saving light bulb for each house’s light fixture?
  3. How much electricity can you save if you replace all of the 30 regular light bulbs with energy saving light bulbs?
  4. The average price of 1kwh-electricity in California was 21 cents in August 2018. How much money could your family save for electricity in a year if you replaced all of the 30 light bulbs with energy saving light bulbs in a year?

 

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Answer keys

  1. 200 x 30 = 6,000 (kWh)
  2. 30 x 30 = 900 (kWh)
  3. 6,000 – 900 = 5,100 (kWh)
  4. 5,100 x 21 = 107,100 (cents) = $ 1,071