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Alcohol thermometers are specially suited for extreme cold environments. Option A (Tropical countries) is incorrect — tropical countries have warm to hot climates. Mercury thermometers work well in these regions since temperatures rarely fall below -39°C (mercury's freezing point). Alcohol thermometers are not specifically needed here. Option B (Polar or extremely cold regions) is CORRECT — alcohol thermometers are used in polar regions (like Antarctica, Arctic Circle) and countries that experience extremely low temperatures (such as Russia, Canada, Iceland, Greenland). This is because alcohol freezes at approximately -114°C, far below mercury's freezing point of -39°C. So alcohol thermometers can measure temperatures in polar regions where mercury would freeze. Option C (Desert regions) is incorrect — deserts have high daytime temperatures, so alcohol thermometers (limited upper range) are not specifically needed. Option D (Coastal regions) is incorrect — coastal regions have moderate climates, and there is no specific need for alcohol thermometers there.
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Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
