Everyday Science
A cooling agent that has lower temperature than water ice, is solid form of ——.
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Biogas produced as a result of anaerobic decay of organic matter consists primarily of —— gases.
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Low silicon, oxygen and rich iron, magnesium are the characteristics of —— magma.
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Eugenics is the study of:
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Euclid was:
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X-ray was invented by:
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Spectacles were invented by:
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Barometer was invented by:
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Automobile was invented by:
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