Please answer this: John was tuning his musical instruments with two tuning forks, fork A and fork B. He produced higher frequency with fork A and lower frequency with fork B. Interestingly, both frequencies had the same amplitude. Which fork John needed to move less quickly, fork A or fork B?
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Answer: fork B

Please answer this: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment. Which planet experienced the heating effect of greenhouse gases?
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Answer: Earth

Please answer this: Two researches studied the Earth's mantle. Clint studied mantle melting, and his pal Uri decided to study other mantle related phenomena. Which researcher read less about lowering the mantle's melting point?
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Answer:
Uri