Earth & Environment
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When was the first element discovered?
What is fire?
How many atoms does it take for something to become visible to the naked eye?
How do you find love?
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Why does burning magnesium produce white light, and copper green light?
Can fire burn or melt everything?
Is it ok to pee in the ocean?
Why does a frozen fizzy drinks can burst open?
How does a puddle evaporate?
What are Olympic medals made of?
What’s the difference between an atom and a molecule?
What is salinity?