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学了《物体的热胀冷缩》一课后,通过实验我们知道了液体、固体、气体都有热胀冷缩的性质。在冬天,温度若是达到0℃以下,水就会结冰。大多数的物体都是热胀冷缩的。水在4℃以上的时候,也是热胀冷缩,但是当它在4℃以下的时候就变成了热缩冷胀了。严寒的冬天,跟冷空气直接接触的水,总是水面散热较快。当水的温度在4℃以上时,由于热胀冷缩
After learning the lesson “The thermal expansion and contraction of an object”, we learned through experiments that the liquid, solid, and gas all have the property of thermal expansion and contraction. In winter, if the temperature reaches below 0°C, the water will freeze. Most of the objects are hot and cold. When water is above 4°C, it is also hot and cold, but when it is below 4°C, it becomes hot and cold. In cold winters, water that is in direct contact with cold air always heats up quickly. When the water temperature is above 4°C, due to thermal expansion and contraction