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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’s the atmosphere? Weather science

By |2018-09-23T20:18:36+00:00August 19th, 2017|Physics|

Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more about planets Do all planets have atmospheres? Not all planets have atmospheres. In order to have an atmosphere, the planet has to have [...]

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 [...]

Who is Hephaistos? Ancient Greek gods

By |2018-04-23T08:41:53+00:00July 13th, 2017|Greeks, Religion|

Hephaistos' forge is a volcano. Hephaistos (heh-FAIS-toss) is the blacksmith god, the god of volcanoes and hot fires and smelting metal ore to make iron. People said he lived inside volcanoes, and when they erupted it was because Hephaistos was moving around. Hephaistos was Hera's son. He had no father, just as Zeus' daughter Athena had no mother. People said that Zeus (or maybe Hera) [...]

Ancient Greek climate, plants, and animals

By |2018-09-17T07:53:12+00:00July 6th, 2017|Environment, Greeks|

Ancient Greek climate: The island of Rhodes Good fishing Fishing was very important to early Stone Age people, and fishing is probably what brought the first people to Greece. No part of Greece is more than about forty miles from the sea: a couple of days walking. So Greece was a great place [...]

What is quartz? Igneous rock

By |2018-09-06T07:27:12+00:00June 26th, 2017|Geology|

What is quartz? A chunk of white quartz What is quartz made of? Quartz is an igneous rock made out of molecules of silicon and oxygen atoms held together in a crystal pattern. All of the silica and oxygen that make quartz came originally from the insides of stars, and it shot out [...]

What are igneous rocks? Volcanic stone

By |2018-04-21T11:56:41+00:00June 26th, 2017|Geology|

Obsidian tools Igneous means "fiery", and igneous rocks are rocks that were made by heating them up in a fire. Usually that fire is the big fire inside the earth, under the earth's crust. Inside the earth, radioactivity creates very high temperatures of about 1000 degrees Celsius (that's about 1800 degrees Fahrenheit). Because [...]