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What is plate tectonics? Earthquakes and volcanoes

By |2018-04-18T09:54:07+00:00September 21st, 2017|Geology|

The world as seen from space (flattened out) When you look at a map of the world, it seems as though it was always like that - North America on top of South America, Europe north of Africa, Australia off at the bottom right. But really all of the dry land on Earth moves around like floating shapes about 60 miles [...]

What is snow? Weather – Earth science

By |2018-04-24T14:32:37+00:00August 20th, 2017|Physics|

If it's colder, rain may fall as snow. About two and a half billion years ago, the Earth finally cooled down enough for it to snow for the first time. Most of the time since then, the Earth has been warm enough that it didn't snow at all. But from time to time, the Earth becomes cooler, entering [...]

What makes thunder and lightning? – Weather science

By |2018-04-24T15:20:20+00:00August 20th, 2017|Physics|

A bolt of lightning in the sky Hot air and cold air are constantly moving around the Earth, as the hot air rises and the cold air sinks - that's what makes wind. Sometimes as this airmoves around, it gets more exciting than just wind, though. A thunderstorm begins when the wind picks up a lot of water from the [...]

Ibn Sina (Avicenna) – Medieval Islamic medicine – Islamic Empire

By |2018-04-24T08:21:22+00:00July 27th, 2017|Islam, Science|

Where Ibn Sina came from: Uzbekistan Ibn Sina and the Samanids in Uzbekistan Ibn Sina (known to Europeans as Avicenna) was a scientist. He was born about 980 AD in the north-eastern part of the Abbasid Empire. That was in the kingdom of the Samanids. (It's modern Uzbekistan.) The Samanids supported science and art, so many scientists and artists [...]

Where are the Ural Mountains?

By |2018-10-16T07:51:52+00:00June 25th, 2017|Central Asia, Geology|

Ural Mountains in Russia Ural Mountains in Central Asia The Ural Mountains run from north to south through Central Asia. They separate Europe from Asia. Like the Appalachian Mountains, the Urals formed about 300 million years ago. That was near the end of the Carboniferous period, when the first reptiles were evolving. It [...]

Where are the Rocky Mountains?

By |2018-04-21T11:56:41+00:00June 25th, 2017|Geology, North America|

Rocky Mountains The Rocky Mountains stretch all the way from the southern United States north into Canada. They through Utah, Colorado, Wyoming, Montana, and up into Alberta. What we call the Rocky Mountains is really three different mountain chains, one on top of the other. The oldest mountain chain started more than a [...]

Which mountains are the highest?

By |2018-04-21T11:56:41+00:00June 25th, 2017|Geology|

Up in the Alps in Switzerland Which mountains are the highest in the world? Practice graphing and see how much higher some mountain chains are than others. The highest peaks of each mountain range are below: Appalachian Mountains: 2037 meters above sea level Alps: 4810 meters Rocky Mountains: 4399 meters Himalaya Mountains: 8850 [...]

Where are the Appalachian mountains?

By |2018-06-01T23:36:30+00:00June 25th, 2017|Geology, North America|

The Appalachian Mountains When did the Appalachian Mountains form? About 300 million years ago, near the end of the Carboniferous period, when the first reptiles were evolving, the tectonic plates began to form the supercontinent of Pangaea. (More about plate tectonics) How high were the Appalachians when they were new? When the Euramerica [...]

Where are the Andes Mountains? South America

By |2018-04-21T11:56:40+00:00June 25th, 2017|Geology, South America|

The Andes mountains run down the Pacific side of South America About 199 million years ago, near the beginning of the Jurassic period, was the time of the dinosaurs. That's when the supercontinent of Pangaea broke up and the pieces began to float away from each other. The supercontinent split up into the [...]