Asian rhinos are threatened — Who can run faster, Rhinos or Usain Bolt?


Grade level: 4 – 6th grades

Math skills: Speed

Related Environmental issues: Biodiversity / Deforestation

Javan rhinos, or Asian rhinos, are one of the most endangered animals with only about 60 indivisuals.

Rhinos can run at the speed of 50 km per hour. Usain Bolt ran 100 meters at 9.58 seconds.  Who can run faster? Explain.


Answer: Rhinos

50 km = 50,000 m

50,000 / 100 = 500

Usain Bolt runs 50km in 

[9.58 x 500 = 4,790 seconds] if he keeps running at the same speed. The running speed of rhinos is 50km per 3,600 seconds (=1hour) while that of Usain Bolt is 50km per 4,790 seconds.  Rhino can run about 1.3 times faster than Usain Bolt. 

(Usain Bolt’s running speed is 37.5 km per hour.)

“Once the most widespread of Asian rhinos, Javan rhinos are now listed as critically endangered. With only one known population in the wild, it is one of the world’s rarest large mammals.

There are between 58 and 68 in the wild, with none living in captivity. The rhinos are often poached for their horns, although loss of habitat, especially resulting from the Vietnam War, has also contributed to their decline.

The only population of Javan rhinos can be found in Ujung Kulon National Park on the south-western tip of Java, Indonesia. The only other population, in Vietnam, was wiped out in 2010.” 

(Source: Wanderlust, 2020 : https://www.wanderlust.co.uk/content/10-of-the-worlds-most-endangered-animals/)


Factful Environmental Math Problems (2020)

Just published and now available from Amazon  (paperback)

About this book

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

Screen Shot 2020-04-02 at 10.20.25 AM
Screen Shot 2020-04-02 at 10.31.32 AM
Screen Shot 2020-04-02 at 10.31.38 AM
unknown-1

Published: March 26, 2020

Price: $6.25

Six Portuguese young activists filed climate lawsuit against 33 European countries – How big are their CO2 emissions?

Grade level: 4 – 6th grades

Math Skills: Decimal numbers

Related environmental issues: Climate Change

Six Portuguese young activists filed climate lawsuit against 33 European countries, including Germany, France, the U.K., and Greece, claiming government climate inaction threatens their well-being.

The table below shows the top 5 countries in the world that emitted the largest CO2 in 2019. EU27 + UK emitted 6.47 tons of CO2 per person in 2019. 

How many countries in the table emitted more CO2 per person than EU27+UK? 


Answer

ANSWER: 4  (All five countries but India emitted more CO2per person than EU27+UK in 2019) 

Source: European Commission EDGAR (Emissions Database for Global Atmospheric Research), 2020. Fossil COemissions of all world countries, 2020 report.

     


Factful Environmental Math Problems (2020)

Just published and now available from Amazon  (paperback)

About this book

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

Screen Shot 2020-04-02 at 10.20.25 AM
Screen Shot 2020-04-02 at 10.31.32 AM
Screen Shot 2020-04-02 at 10.31.38 AM
unknown-1

Published: March 26, 2020

Price: $6.25