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第23课

2021-6-12 10:11| 发布者: admin| 查看: 99| 评论: 0

摘要: .

第二十三课

Lesson Twenty-three

水的三态变化

Three state change of water

1.了解水的三态变化与我们生活的关系。

Understand the relationship between the change of three states of water and our life.

2.水在自然界中有三种存在形态，它们之间是怎样变化的呢？

There are three forms of water in nature. How do they change?

3.水在什么情况下开始结冰？

When does water begin to freeze?

4.寒冷的冬天，放在室外的湿衣服结了冰也会慢慢变干。

In cold winter, the wet clothes that are put outside will become dry when they are frozen.

5.衣服里的水经历了哪些形态的变化？

What are the morphological changes of water in clothes?

6.衣服里的水结了冰。

The water in the clothes iced.

7.冰又变成了什么？

What has ice become?

8.水结冰时的温度就是水的冰点。

The temperature at which water freezes is the freezing point of water.

9.水在自然界里有冰水、水蒸气三种不同的形态，冰融化、水蒸发要吸收热量；

There are three different forms of water in nature: ice water and water vapor;

10.水结冰、水蒸气变成水要放出热量。

When water freezes and steam turns into water, it gives off heat.

11.水的三态变化主要取决于温度的变化。

The change of three states of water mainly depends on the change of temperature.

12.水的三态变化与我们的生活有着非常密切的关系。

The change of three states of water is closely related to our life.

13.把自已知道的一些现象与同学们交流一下。

Exchange some phenomena you know with your classmates.

14.冷冻车间

Refrigeration workshop

15.晒盐场

Drying saltworks

16.水缸冻裂

Freezing crack of water tank

17.人工降雪

artificial snow

18.地球的南、北两极到处都是厚厚的冰层。

The earth's north and south poles are covered with thick ice.

19.目前，地球气温逐渐升高，使南、北两极的冰雪融化加速，海平面上升。

At present, the earth's temperature is gradually rising, which accelerates the melting of ice and snow in the South and north poles and increases the sea level.

20.如果这种现象持续下去，将造成什么样的后果？

If this phenomenon continues, what will be the consequences?

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