Science

What is the hardest known natural material?

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What are the ends of a bar magnet called?
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A very fast white water cascade is also known as what?
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The science term, "agronomist", is best defined as?
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Where is the world’s most active volcano located?
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What is a body's resistance to changes in motion or speed called?
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Who was the last person to set foot on the moon in 1972?
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What is the 6th planet from the sun in our solar system?
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