Who built Great Zimbabwe? Central African history
Central Africa in the Middle Ages: Great Zimbabwe Iron comes to Central Africa Besides South Africa, central Africa is the most isolated part of Africa. For many years, the people who [...]
Central Africa in the Middle Ages: Great Zimbabwe Iron comes to Central Africa Besides South Africa, central Africa is the most isolated part of Africa. For many years, the people who [...]
There are electromagnets inside stereo speakers When did people invent electromagnets? In the early 1800s AD, about 200 years ago, scientists in Denmark and Britain figured out another way to [...]
Brio trains have magnets at the ends for your magnet project Brio trains and magnetism To see how magnets push and pull each other, get out your wooden Brio trains. One end [...]
Build your own electromagnet with a nail, some copper wire, and a battery What will I need? You can build your own electromagnet. Get about five meters of copper magnet wire (you can [...]
A Mississippian warrior Why were the Mississippians powerful? About 800 AD, the old Hopewell people seem to have developed what we call the Mississippian culture. People living near the Mississippi river got new kinds [...]
Japanese painting of Portuguese bringing Indian cargo to Japan (1500s AD) - the Mughal Indian Economy Trade under the Mughals Under the Mughal Empire, India continued to make a lot of money [...]
T'ang Dynasty cup (Musee Guimet, Paris) Who invented porcelain? About 700 AD in China, plain white porcelain pottery first begins to appear, like these cups and these bowls. What is [...]
Copper ore in Iran What is metal? Metals are atoms that attach themselves to other atoms in a particular way. Metal atoms, because of how their electrons are arranged, lose [...]
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 [...]
Diagram of a copper atom What is copper? Copper is a kind of atom that has only one electron in the outermost ring. What's an electron? What are atoms? A [...]