Ancient China’s Economy and Trade
Ancient China trade: Rice paddy with a Chinese man planting rice Farming in Ancient China In China, as in West Asia, India, or Africa, most people have spent most of [...]
6
06, 2017
2
06, 2017
What is sodium? Atoms, elements, chemistry
Diagram of a sodium atom Sodium is an atom that has 11 protons and 12 neutrons in its nucleus and 11 electrons circling around its nucleus. Like other light atoms [...]
2
06, 2017
Ice, water, and simple chemistry
Ice chemistry: Perito Moreno glacier, Argentina (thanks to Argentina's Travel Guide) How water freezes into ice When water gets colder than 32 degrees Fahrenheit or zero degrees Celsius, it freezes [...]
1
06, 2017
Ice and salt – Chemistry project
A group of glasses of water Take five glasses of water. Leave one plain water, add one tablespoon of salt to the second glass, two tablespoons of salt to the [...]
1
06, 2017
Chlorine project – Bread and bleach – Chemistry
Swimming pool To find out what chlorine smells like, just go to the swimming pool. The funny smell of swimming pools is the smell of chlorine. (Actually, the chlorine doesn't [...]
28
05, 2017
Yeast Project – Bread-making – Cell biology
A boy making bread You can see what yeast does by making bread at home. It doesn't matter what recipe you use as long as the recipe calls for yeast, [...]
22
05, 2017
African Economy Learning Activity
African salt caravan To have a chance to think about what these economic trades would have meant to African people, imagine you are one of these people (if you're in [...]
19
05, 2017
Salt Caravans
Han Dynasty Chinese tile showing people mining salt underground and then processing it. See the bamboo pipe? Mining salt in antiquity The salt trade, already important in the Bronze Age, [...]
