Selina History Project by https://padlet.com/selinachenwang/Bookmarks I will be describing about 3 subjects. en-us 2022-04-08 10:38:30 UTC 2026-01-26 16:42:16 UTC hello@padlet.com http://ecx.images-amazon.com/images/I/51lK4Bn9TUL._SX258_BO1,204,203,200_.jpg Number facts selinachenwang https://padlet.com/selinachenwang/Bookmarks/wish/2175885873
  • Trigonometry is used to calculate distances to the stars and more.
  • In the early 9th century, Al-Khwarizmi built tables that helped to calculate missing values ​​in astronomical tables that show the location of stars.
  • Arabic numerals led to simple fractions and decimal fractions.
  • Al-Khwarizmi (the father of algebra) introduced new concepts in maths in Baghdad around 830.
  • The numbers we use today came from Arabic symbols used more than 1,000 years ago.
  • Al-Karaji built on the rules of algebra started an algebra school that thrived for several hundred years.
  • With a better understanding for maths, people were able to use it as a practical tool in business and everyday life.
  • Arabic numerals made calculations much easier than the roman system, which used letters like X, V, L ,I ,C and M for numbers or other systems based on dots, pictographs or finger counting.

    • It is important because today we still use maths and numbers. Without it, maths would be harder.

    ]]>     2022-05-09 15:06:42 UTC https://padlet.com/selinachenwang/Bookmarks/wish/2175885873     Hot Facts about Coffee selinachenwang https://padlet.com/selinachenwang/Bookmarks/wish/2175897208
  • Ripe coffee beans are red and are called coffee cherries.
  • Cappuccino coffee gets its name from the colour of the robes worn by Christian capuchin monks.
  • The world’s first coffee shop opened in Venice.
  • Coffee shops in England were nicknamed penny universities because you could listen to and talk with some of the greatest minds of the day for the price of a cup of coffee.
  • Today a tall latte(coffee with milk) is the most popular drink at Starbucks.
  • Hawaii and Puerto Rico are the only places in the United States where coffee can be grown.
  • Coffee is now grown in 65 countries and it’s the world’s second most traded commodity after oil.
  • Mocha is both the name of a kind of coffee bean and the name of the port in Yemen that was the centre of the coffee trade from the 17th to the 15th centuries.
    • It is important because today we drink it to wake us up.

    ]]>     2022-05-09 15:12:46 UTC https://padlet.com/selinachenwang/Bookmarks/wish/2175897208     Wacky Words from the Past selinachenwang https://padlet.com/selinachenwang/Bookmarks/wish/2175900879
  • G is for Giraffe from Zarafa.
  • M is from Mummy from Mūmiyā(embalmed corpse).
  • Y is for Yogurt from Turkish Yoǧurt.
  • T is for Tuna from Al-Tūn(tuna fish).
  • Z is for Zero from sifr(empty).
  • K is for Kabob from Kabab(small chunks of meat grilled on a skewer).
  • X in Algebra, meaning a thing(shay) is an Arabic invention to solve equations.
  • O is for Orange from Naranj(orange).
    • It is important because today we often use some of these words and without them we would have to describe them.

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