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What are hurricanes? Weather science

By |2018-09-10T10:05:35+00:00August 20th, 2017|Physics|

A hurricane in Cuba What is a hurricane? A hurricane (also called a typhoon or a cyclone) is basically a huge spinning wind. Okay, then why is there wind? How do hurricanes get started? Hurricanes form in the summer and especially in the fall, because they can only form where there is cold air high over warm [...]

What causes wind (Hot air rises) – Wind and weather Science

By |2018-09-19T08:16:28+00:00August 20th, 2017|Physics|

Hot air balloon - hot air rising is what causes wind Hot air is lighter than cold air When something is hot, its molecules are farther apart than when it is cold. When air is hot, its molecules are further apart, so it takes up more room. That makes hot air lighter than cold air, because the [...]

Shoguns and Mongols – Kamakura Japan

By |2018-05-06T17:41:50+00:00July 27th, 2017|History, Japan|

First shogun of Japan: Minamoto Yoritomo (maybe), by Fujiwara Takanobu Who was the first shogun of Japan? The first shogun, Minamoto Yoritomo, established the system: all officials were pretty much military officials. Japan broke up into a lot of small kingdoms, which were always fighting each other. There were a lot of wars, mostly [...]

Global warming in modern times

By |2017-06-20T01:27:44+00:00June 20th, 2017|Environment, Science|

Coal plant in China Human activities probably started to affect the world's climate as early as about 10,000 BC. That's when people started farming and cut down a whole lot of trees to create their fields. Trees take in carbon dioxide and convert it to oxygen. So without them, carbon dioxide levels rose, [...]

Ancient China’s environment – Himalayas and Gobi Desert

By |2018-04-18T09:54:13+00:00June 6th, 2017|China, Environment|

Himalaya Mountains Sometimes people describe China's landscape as being like a staircase with three steps. The top step of this staircase is in the west, where the Himalaya mountains are (India is on the other side of these mountains). Tibet is in this part of China. People call it "the roof of the [...]

Toregene and Kublai Khan – Mongol Empire History

By |2017-05-31T15:37:25+00:00May 31st, 2017|Central Asia, History|

Coin of Toregene Toregene ruled the Mongol Empire for five years. By then she was not in good health - she was about 55 years old. She passed on her power to her son Guyuk in 1246 AD and went into retirement, where she died less than two years later. Mongke Khan [...]