A person in which country uses more water on average – US or Canada?

Grade level: 3rd – 5th grades

Skills: Bar graphs

Related environmental issues: Water

The bar graph below shows how much water is consumed per person every hour in six countries.

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  1. On average, a person in which country uses the most water among these countries?
  2. A person in how many countries uses more than 20 gallons of water every hour on average?
  3. On average, a person in which country uses the least water among these countries?
  4. A person in which county uses twice as much water as a person in Germany on average?


Source: statistic (2020) Annual water consumption per capita in 2017


Answer keys

2. Three (US, Canada, and Australia)




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How many more wild giant pandas do we have now?

Grade level: 6th – 8th grades

Skills: Percentage

Related environmental issues: Biodiversity & Deforestation

[The use of a calculator is permitted]

Giant panda has long been on the endangered species list because the forests they live in China have been destroyed as the population in the country grows. However, due to conservation efforts made by the Chinese government, wild panda numbers have been increasing. The pandas are still at risk but they are now off the endangered species list.

According a survey, there are 1,864 giant pandas in the wild, and the population has grown by 16.8% over the last decade.  The survey also found that 66.8% of wild giant pandas live within protected panda nature reserves in China, while the rest live outside of the protected areas.


  1. How many wild giant pandas were there 10 years ago? How many more giant pandas do we have now? Round to the nearest ones.
  2. How many giant pandas live outside of the protected panda nature reserves? Round to the nearest ones.


Source: WWF, 2015. Panda population grows nearly 17 percent

Photo: WWF


Answer keys

  1. There were 1,596  pandas ten years ago. The population increased by 268 [116.8/1864 = 100/X]
  2. 619       [1,864 x (1 – 0.668)]