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What herbal medicines do people still use today?
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Basic Chemistry
How do herbal medicines differ from modern medicine?
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Basic Chemistry
How did chemistry affect trade in ancient times?
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Basic Chemistry
What is fire?
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Basic Chemistry
How can a fire be started with a piece of flint?
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Basic Chemistry
Who first realized that air has weight?
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Basic Chemistry
Who first realized that oxygen gas (O2) was required for fire?
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Basic Chemistry
What is the theory of phlogiston?
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Basic Chemistry
