Which country uses more water per person, China or Brazil?

Grade level:  6th grade

Skills: Range, mean, mode, and median

Related environmental issues: Water

Everyday a lot of water is used for many purposes, such as electricity generation, irrigation, household use, and so on. The table below shows daily water use per person in 5 countries.

screen-shot-2017-02-12-at-8-47-22-pm

  1. What is the range of the data?
  2. What is the mean of the data?
  3. What is the median of the data?
  4. What is the mode of the data?

Sources: Food and Agriculture Organizations of the United Nations

__________________________________________________________

Answer keys

  1. 1116 – 5 = 1111
  2. (5 + 1116 + 308 + 93 + 268) ÷ 5 = 358
  3. 268
  4. none

Which country generates the largest amount of electricity from solar energy in the world?

Grade level: 5th – 6th grades

Skills: Decimals, Addition & Subtractions & Median

Related environmental issues: Energy

We have used power from the sun in two ways – as a heat source and as an energy source. Today, we use solar energy to heat water and air in our homes by using solar collectors. We also use solar energy to make electricity by using solar panels. The table below shows the 5 countries that generate the largest amount of electricity from solar energy in the world.  

screen-shot-2016-09-29-at-12-22-27-pm

  1. Which country generates the largest amount of electricity from solar energy in the world?

  2. Which country generates electricity from solar energy 0.3 gigawatts more than United States?
  3. How much more electricity does China generate than Japan?
  4. Find the median of the 5 numbers.

Source: REN 21, Renewables 2016 Global Status Report

—————————————————————–

Answer keys

1.  Germany

2. Italy

3. 4.9 gigawatts (28.3 – 23.4 = 4.9)

2. 23.4