Helium balloon projects – Chemistry
You can see that helium is lighter than air by getting a helium balloon. When you let go of it, it goes up, because the helium is lighter than the nitrogen and [...]
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06, 2017
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06, 2017
Carbon dioxide project with Dry Ice – Chemistry
Frozen carbon dioxide (dry ice) - for your carbon dioxide project How can you see carbon dioxide? Normally you can't see carbon dioxide because it is an invisible gas. But [...]
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05, 2017
History of Angola – African History
Kingdom of Ndongo In 1500 AD, some of the people who lived in what is now Angola were Bantu and some were San. A Bantu man from Congo, Kiluanje, probably started the [...]
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05, 2017
History of the Kongo
Mbanza Kongo, capital of the Kingdom of Kongo When did the Kingdom of Kongo form? By 1500 AD, the Kingdom of Kongo had been around for more than a hundred [...]
