What is iron? Atoms, elements, chemistry
Diagram of an iron atom When a red giant star finishes changing all of its helium into carbon and oxygen, it then starts to turn the carbon and oxygen atoms into iron atoms. Iron [...]
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06, 2017
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06, 2017
Tin cans – Chemistry projects – Science
Steel soup can To see how tin keeps a steel can from rusting, get an empty can. A can from canned green beans or canned peaches or something like that would [...]
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06, 2017
Rust and iron – Chemistry project
A rusty sign You can easily see that iron rusts and turns red when oxygen touches it. Go look around your backyard or your neighborhood and try to find ten things [...]
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06, 2017
Cooking pots – Copper science project – Chemistry
Copper-bottomed cooking pot: a science project Why do pots have copper bottoms? Because heat and electricity are closely related, copper is also a good conductor of heat. This is why [...]
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06, 2017
Sewing, wheels, and steel – Central Asian science
Central Asian science: A clay pot with a drawing of a wheeled cart from what is now Poland, about 3500 BC What was invented in Central Asia? Many of the [...]
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05, 2017
Samanids – History of Central Asia
The tomb of the Samanid rulers. Bukhara, Uzbekistan, about 900 AD. Who were the Samanids? The Samanids were people who lived in the easternmost part of the medieval Abbasid Empire. They [...]
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05, 2017
What was the Silk Road? Central Asian Economy
Mongol herdsman Hunting wild animals The first people moved into Central Asia about 50,000 BC. They were probably following the big animals that they hunted for food and leather skins [...]
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05, 2017
What is cement? History of Architecture
History of cement: An underground mithraeum in the Roman port town of Ostia History of cement Cement is a very hard kind of rock that people make themselves. People all over [...]
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05, 2017
Why use concrete? History of Architecture
History of concrete: The fountain in the center of the courtyard is concrete (This is from the Palace of Domitian in Rome) What is concrete? Concrete is a kind of [...]
