The Water Cycle
美音、自然拼读、分级阅读与词汇复习
Table of Contents Water All Around Us.
内容表 水在我们周围。
4 From Liquid to Gas.
4 从液体到气体。
7 Up in the Air.
空中7号
10 Where Does It All Go?
10号 全部放哪了?
12 The Water Cycle Is Important.
12 水循环很重要。
14 Glossary.
14 词汇表。
16 Water All Around Us Water covers most of Earth.
16 我们周围的水覆盖了大部分地球。
It’s found in lakes, rivers, and oceans.
它存在于湖泊、河流和海洋中。
It’s on top of mountains in the form of snow or ice.
以雪或冰的形式,
It’s deep under the ground.
地底下很深,
Water is even in the air around you.
水在你周围的空气里也是
Earth’s water can be fresh or salty.
地上水可以新鲜或咸.
Most rivers, lakes, and streams have fresh water.
大多数河流、湖泊和溪流都有淡水。
Most salt water is found in the ocean.
盐水多见于出海.
The water you see today has been around for a long time.
汝今所见之水相去已久.
Did you drink water this morning?
你早上喝水了吗?
It might be the same water a dinosaur drank a million years ago!
可能是一百万年前恐龙喝的水!
All living things on Earth, from tiny bacteria to giant whales, need water.
地球上所有生物,从细小的细菌到巨型鲸鱼,都需要水.
Even dinosaurs needed water!
连恐龙都需要水
How is this possible?
这怎么可能?
All water on Earth is recycled!
地球上的水都循环利用了!
Although you can’t always see it happening, Earth’s water is moving around in a never-ending pattern.
尽管你无法总能看见它发生, 地球的水正在以永无止境的模式流动。
This pattern is called the water cycle.
这种图案被称作"水循环".
From Liquid to Gas Imagine a puddle of water on a hot day.
从液态到气态 想象出热天有一池水
As the day goes on, the puddle of water gets smaller and smaller until it’s completely gone.
水池越来越小,
After many hot days without rain, this lake is drying up.
经过多起没有下雨的热天后,这个湖正在干涸.
Although you can’t see it anymore, the water didn’t just go away.
虽然你再也看不见了,
The puddle grew smaller because heat from the Sun turned the liquid water into an invisible gas.
由于来自太阳的热能将液体水转化为隐形气体,水坑变小.
Do You Know?
你知道吗?
Sometimes when water is heated up, you might see a cloud rising from it.
有时,当水被加热时,你可能会看到云从中升起.
This cloud is called steam.
此云名为蒸.
Steam is a mix of tiny drops of liquid water and water in the form of gas.
蒸汽是液态水和水以气体为形式的微滴相混合.
You can see steam because the drops of water make it visible.
可以看到蒸汽,因为滴出的水使其可见.
This is the first step of the water cycle.
这是水循环的第一步.
It is known as evaporation.
被称作蒸发.
Most evaporation on Earth happens in bigger bodies of water, such as rivers, lakes, and the ocean.
地球上大部分蒸发发生在更大的水体中,如河流,湖泊和海洋.
The ocean plays an important part in the water cycle.
海洋在水循环中起重要作用.
This is because it holds most of the water on Earth.
这是因为它拥有地球上的大部分水。
Up in the Air When water is in the form of gas, it’s called water vapor.
在空气中,当水以气体的形式出现时,它被称为水蒸汽。
Air carries the water vapor high into the sky.
空气把水蒸发气 高高地注入天空
As water vapor rises, it cools and becomes tiny droplets of liquid water.
随着水蒸汽的升起,它冷却并成为液态水的微小滴.
Then, the water droplets form clouds.
然后,水滴会形成云.
This step of the water cycle is called condensation.
水循环的这个步骤叫做收缩.
There are many kinds of clouds.
云有多种相.
They can look different depending on the weather, but they are all made of water droplets.
它们视天气而异,但它们都是由水滴所制.
Sometimes water droplets in the clouds grow too big and heavy for the air to hold.
有时云中水滴会生长出过大过重的空气来支撑.
When this happens, they fall back down to Earth as rain, snow, sleet, or hail.
当这种情况发生时,它们会回落到地上,如雨,雪,雪地,冰雹等.