Which car is clearer – Ford F150, Toyota RAV4 or Honda Civic?

Grade level:  5th grades

Skills:  Multiplication and division (decimals)

Related environmental issues: Air / Climate change / Energy

Area level: National, State, Regional, Household

Burning gasoline in motor vehicles is one of the biggest causes of air pollution in the United States. How much gasoline your car uses is strongly connected to how dirty the air in your area is. The table below shows how many miles three cars can run on one gallon of gasoline. Those three cars are the top-8 best-selling vehicles during the first half of 2018 in the United States.

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1. Which car can go half as far as Honda Civic on one gallon of gasoline?

2. An average American drives 280 miles a week. How much gasoline does an owner of each car use on average?

3. Which car among the three is more environmentally friendly? Why? Explain.

4. If the price of gasoline today is $3 a gallon, how much money does an owner of each car need to spend for gasoline in a week on average?

5. Which car among the three would you like to by? Why? Explain.

Source: 1) Business Insider, 2018 2) fuel economy.gov, 2018 3) U.S. Department of Transportation Federal Highway Administration, 2018

Note: Average Annual Miles per Driver: 13,476 miles (U.S. Department of Transportation, 2018)


Answer Key

  1. Ford F150
  2. Ford F150: 280 ÷ 16 = 17.5 (gallons)   Toyota Rav 4: 280 ÷ 25 = 11.2 (gallons)   Honda Civic:  280 ÷ 32 = 8.75 (gallons)
  3. Honda Civic: It uses less gasoline and emits less air pollutants into the air.
  4. Ford F150: 17.5 x 3 = $52.5  Toyota Rav 4: 11.2 x 3 = $33.6  Honda Civic:  8.75 x 3 = $26.25
  5. Answers may vary

 

How does your plastic use affect marine life?

Grade level: 5 – 6th grades

Skills: Multiplication and Division

Related environmental issues: Plastic Waste 

A whale was found dead on the Murcian coast in southern Spain in late February after swallowing 64 pounds of plastic waste.

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Dead Whale Project of Greenpeace Philippines

 

Most plastic grocery bags are thrown away after being used, and millions of tons of plastic bags end up in the ocean. Those plastic bags have killed marine birds and turtles that confused plastic bags for jellyfish and plankton. The amount of plastic waste found in the ocean in a year is equivalent to five plastic grocery bags for every foot of coastline in the world.

  1. How many grocery bags are found in 1 mile of coastline in a year? (1mile = 5,280 feet)
  2. How many grocery bags are found in 1 mile of coastline in a month?
  3. Every month, 25 volunteers gather at their 1-mile beach to pick up plastic waste.  How many grocery bags does each volunteer need to pick up to clean their beach?
  4. 4.It is reported that the amount of plastic waste will double by 2025. How many grocery bags will be found in 1 mile of coastline in a year of 2025?

 

Source) New York Times, February 12, 2015. Study Finds Rising Levels of Plastics in Oceans

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Answer keys

  1. 26,400 bags (5,280 x 5 = 26,400)
  2. 2,200 bags (26,400 ÷ 12 = 2,200
  3. 88 bags (2,200 ÷ 25 = 88)
  4. 52,800 bags (26,400 x 2 = 52,000)