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2 10, 2017

Who built Great Zimbabwe? Central African history

By |2019-08-22T23:46:16-07:00October 2nd, 2017|Africa|0 Comments

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 lived here saw almost nobody from outside their own area. So it took longer for people in Central Africa to find out about [...]

16 08, 2017

Electromagnets – electricity and magnets

By |2019-05-27T07:14:24-07:00August 16th, 2017|History|0 Comments

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 make magnets. (These countries had a lot of scientists thanks to colonization, slavery, and control of trade). History of electricity History of slavery Europe's [...]

16 08, 2017

Magnet project – electricity

By |2019-02-23T16:40:02-07:00August 16th, 2017|Physics|0 Comments

Brio trains have magnets at the ends. Brio trains and magnetism To see how magnets push and pull each other, get out your wooden Brio trains. One end of each car has a positive magnet and the other end has a negative magnet. More about magnets And electromagnets An electromagnet project All our physics articles [...]

16 08, 2017

Electromagnet project – Electricity – Science

By |2019-05-27T09:55:53-07:00August 16th, 2017|Physics|5 Comments

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 buy it at Radio Shack or Home Depot), a large iron nail or another piece of iron about the same size like a butter [...]

9 08, 2017

Mississippi People – Native Americans

By |2018-04-07T17:05:36-07:00August 9th, 2017|History, Native American|0 Comments

A Mississippian warrior 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 of corn about this time. Now, instead of just building burial mounds, people built mounds with flat tops and built buildings on top of the mounds, like a Mayan temple. Some [...]

19 07, 2017

Spices and cotton: Mughal Indian economy

By |2019-08-07T10:58:30-07:00July 19th, 2017|Economy, India|0 Comments

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 by trading. Trading ships carried things back and forth. They went west to East Africa and West Asia. And they went east to South-East Asia [...]

6 06, 2017

Tang Dynasty Chinese Pottery – Medieval China

By |2018-08-08T07:11:45-07:00June 6th, 2017|Art, China|0 Comments

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 porcelain? Porcelain is a special kind of pottery. Chinese potters working under the T'ang Dynasty discovered that if you used a special kind [...]

2 06, 2017

What is metal? Chemistry

By |2018-04-24T14:46:23-07:00June 2nd, 2017|Chemistry|0 Comments

Copper ore in Iran Metals are atoms that attach themselves to other atoms in a particular way. Metal atoms, because of how their electrons are arranged, lose their electrons easily. When they join up with other atoms to make molecules, metal atoms join together by exchanging electrons. Because metal atoms join other metal [...]

1 06, 2017

Cooking pots – Copper science project – Chemistry

By |2019-04-24T16:50:44-07:00June 1st, 2017|Chemistry|0 Comments

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 good cooking pots often have copper bottoms. What is copper? What is heat? All our chemistry projects Copper, iron, or aluminum pots? If [...]