This is a timed quiz. You will be given 15 seconds per question. Are you ready?
15
What gas do humans exhale as a waste product of respiration?
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Which of the following is a type of rock formed from volcanic activity?
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What is the chemical symbol for the element Gold?
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Which of these is the most abundant element in the Earth's crust?
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Which of the following planets is closest to the Sun?
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What is the powerhouse of the cell?
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What is the process by which plants make their own food using sunlight?
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Who developed the theory of general relativity?
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Wrong!
Quiz on science gifts
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