How many species are threatened with extinction?

Grade level: 4th – 5th grades

Skills: Rounding (whole numbers)

Related environmental issues: Biodiversity

The number of species that are at risk of becoming scarce has been increasing. They are threatened with extinction mainly because they lost their homes. Humans are responsible for the habitat loss when we destroy their habitats by developing housing, industry, and agriculture. The table below shows number of threatened species.

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  1. Round the number of threatened insects to the nearest thousands.
  2. Round the number of threatened fishes to the nearest hundreds.
  3. Round the number of threatened plants to the nearest thousands.
  4. Round the number of threatened mammals to the nearest tens.
  5. Round the number of total threatened species to the nearest ten thousands.

 

Source: IUCN Red List of Threatened Species, 2020, Summary statistics (Table 1a)


Answer keys

1.2,000
2.2,700
3.16,000
4.1,240
5.30,000

 

 


 

The 225 Math Quizzes That Will Make You An Environmental Expert (2019) is available from Amazon.com.  (paperback)

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In which state do you need to pay more to play video games, Hawaii or NY?

Grade level: 4th – 5th grades

Skills: Bar graphs

Related environmental issues: Energy

The price of electricity varies widely from area to area. This is because the type and the price of energy sources each area uses to generate electricity are different. The bar graph below shows the average electricity price for playing video games for 5 hours in seven states in November 2019.

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  1. 1.In which state do you need to pay more than 30 cents to play video games for 5 hours?
  2. It costs about _____ cents more to play video games for 5 hours in Alaska than in Indiana.
    a.10
    b.20
    c.30
  3. Among the seven states, which is the third most expensive state to play video games?

 

Source: U.S. Energy Information Administration, 2020. Electric Power Monthly

Note: It is using per kW electricity price


Answer keys

1.Hawaii
2.a
3.California

 

 


 

The 225 Math Quizzes That Will Make You An Environmental Expert (2019) is available from Amazon.com.  (paperback)

Screen Shot 2019-01-26 at 10.54.15 AM

 

 

About this book>>>

Table of Contents >>>

Sample Quizzes >>>

Answer Key >>>