科学素养与生活应用·英语30篇(3)
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Why Salt Melts Ice on Roads
为什么盐能融化道路上的冰
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Salt lowers the freezing point of water.盐能降低水的冰点。
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Pure water freezes at 0°C, but saltwater freezes lower.纯水在0°C结冰,而盐水的冰点更低。
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When salt touches ice, it makes liquid brine.盐接触冰时会形成液态卤水。
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This brine spreads and melts more ice around it.这种卤水扩散开来,融化周围的冰。
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Road crews spread salt before snow to prevent icing.道路养护人员会在下雪前撒盐以防结冰。
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Too much salt can harm plants and soil nearby.过多的盐会损害附近的植物和土壤。
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Sand is sometimes used instead for traction.有时也会用沙子来增加摩擦力。
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Salt works best above -10°C.盐在-10°C以上效果最佳。