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-------Lesson Dialog-------

----Simplified ----

地球的水

水无处不在

看看你周围。

水无处不在。

水从天上落下来，流在地上。

它流到土里，流到江河里。

水是液体。

我们地球的大部分地方被水覆盖着。

水在海洋，河流，湖泊和池塘里。

从云里落下来的水就是雨水。

这些水都是液体。

液体水可以流动。

水的形状，就是它的容器的形状。

温度

水能从液体状态变成别的状态。

当温度变化时，水从一个状态变成另一个状态。

温度是指一样东西有多热或是有多冷。

水作为固体

想像一下雨水从天上落下来。

雨水是液体状态。

但是如果天气很冷，会发生什么？

你说对了--雨水被冻住了。

当雨水冻住时，它从液体变成固体。

固体的水就是冰。

冰是硬的，它有形状。

雪是微小的冰。

有些山上有巨大的冰块，它们被叫做冰川。

冰柱是另外一种冰。

当天气变暖时，冰会怎么样？

冰就融化了，又变成水了！

水作为气体

在温度非常高的时候，液体水会怎么样？

太阳一出来，地上的积水就没有了。

那么这些液体水去哪里了？

太阳的热量让水的状态改变了。

水从液体变成了气体。

水蒸发了，或进入了空气。

气体的水就是水蒸汽。

水蒸气是空气中非常微小的水滴。

你看不到水蒸汽，但你能感觉到它。

水蒸汽会使热天更闷热。

当温度低下来时，水蒸汽会改变。

水蒸气凝聚，又成为了水。

于是你又能看见它了！

生命需要水

植物和动物需要水。

水是地球上所有生物都不能缺少的。

----English----

EARTH’S WATER

WATER ALL AROUND

Look around you.

Water is everywhere.

Water falls from the sky and flows overland.

It goes into the ground and fills bodies of water.

WATER AS A LIQUID

Most of our planet is covered with water.

Water is in oceans, rivers, lakes, and ponds.

Water falls from clouds as rain.

All this water is in a liquid state.

Liquid water can flow from one place to another.

It takes the shape of whatever it is in.

TEMPERATURE

Water can change from a liquid state to other states.

Water changes from one state to another because of temperature.

Temperature is how hot or cold something is.

WATER AS A SOLID

Think about rain falling from the sky.

The rain is in a liquid state.

What happens if the weather gets very cold?

That’s right—the rain freezes!

When rain freezes, it changes from a liquid state to a solid state.

The solid state of water is ice.

Ice is hard, and it has its own shape.

Snow is tiny pieces of ice.

Some mountains have huge pieces of ice, called glaciers.

Icicles are another form of ice.

What happens to the ice if the weather gets warm?

The ice melts and becomes a liquid again!

WATER AS A GAS

What happens to liquid water when the temperature is very hot?

Puddles go away after the sun comes out.

Where does the liquid water go?

Energy from the sun causes the water to change state.

The water changes from a liquid state to a gas state.

The water evaporates, or goes into the air.

Water in a gas state is water vapor.

Water vapor is tiny bits of water in the air.

You can’t see water vapor, but you can feel it.

Water vapor makes hot days feel sticky.

Water vapor can change when the temperature gets lower.

The water vapor condenses and becomes liquid water.

Then you can see it again!

WATER FOR LIFE

Plants and animals need water.

Water helps everything on Earth stay alive.

----Pinyin----

dìqiú de shuǐ

shuǐ wúchù búzài

Kànkan nǐ zhōuwéi .

Shuǐ wúchù búzài.

Shuǐ cóng tiānshàng luòxià lái , liú zài dìshàng .

Tā liúdào tú lǐ, liúdào jiānghé lǐ.

Shuǐ shì yètǐ .

Wǒmen dìqiú de dàbùfēn dìfāng bèi shuǐ fùgài zhe.

Shuǐ zài hǎiyáng , héliú , húpō hé chítáng lǐ .

Cóng yún lǐ luòxià lái de shuǐ jiùshì yúshuǐ.

Zhè xiē shuǐ dōu shì yètǐ .

Yètǐ shuǐ kéyǐ liúdòng .

Shuǐ de xíngzhuàng , jiùshì tā de róngqì de xíngzhuàng .

wēndù

Shuǐnéng cóng yètǐ zhuàngtài biànchéng biéde zhuàngtài .

Dàng wēndù biànhuà shí , shuǐ cóng yī ge zhuàngtài biànchéng lìng yī ge zhuàngtài .

Wēnù shì zhǐ yí yàng dōngxi yǒu duō rè huòshì yǒu duō lěng .

shuǐ zuòwéi gùtǐ

Xiǎngxiàng yí xià yúshuǐ cóng tiānshàng luòxià lái .

yúshuǐ shì yètǐ zhuàngtài .

Dànshì rúguǒ tiānqì hén lěng , huì fāshēng shén me ?

Nǐ shuō duì le --yúshuǐ bèi dòng zhù le .

Dāng yúshuǐ dòngzhùshí , tā cóng yètǐ biànchéng gùtǐ .

Gùtǐ de shuǐ jiùshì bīng .

Bīng shì yìng de , tā yǒuxíng zhuàng .

Xuě shì wēixiǎo de bīng .

Yǒuxiē shānshàng yǒu jùdà de bīng kuài , tā men bèi jiàozuò bīngchuān .

Bīng [...]