Question 1 of 314
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Question 2 of 314
30
🔓 Bread left uncovered for several days becomes hard mainly because it:
Question 3 of 314
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🤔 Why do most plant leaves appear green?
Question 4 of 314
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🌍 Which gas makes up about 78% of Earth's atmosphere?
Question 5 of 314
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🧠 Sound travels fastest through which medium?
Question 6 of 314
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💊 Which vitamin is primarily produced in the human skin when exposed to sunlight?
Question 7 of 314
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💡 Which connection is generally more resistant to interference over long distances?
Question 8 of 314
30