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Questions:
- Which gave the best quality of light?
- Which was the cleanest source of light?
- What is the process by which the wax in the candle burns? Does it
burn the same way as a match burns or is something slightly different
happening?
- What is the process by which the fuel in the kerosene lamp burns?
What causes the kerosene to rise up through the wick?
- Of what chemical element is the black soot that is deposited on the
lamp glass composed? (Hint: It is not hydrogen).
- What makes the light bulb glow? Is it also burning a
fuel?
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