Focus question.

Why is water important water?

为什么水很重要

Water everywhere

water fills oceans, lakes, and ponds. It blows in rivers, streams and underground, it is even in the air, some parts of earth have snow and ice, which are frozen water.

Water covers most of earth's surface .Salt Water in the oceans makes up much of earth's water. Earth has much less fresh water makes up much of Earth's water.Earth has much less fresh water. Many plants and animals need this fresh water to survive.

到处都是水

海洋、湖泊和池塘里到处都是水。它吹在河流、溪流和地下，甚至在空气中，地球上的一些地方都有风雪，这些都是冷冻水。

水覆盖了地球表面的大部分。海洋中的盐水形成了地球上的大部分水。地球上的淡水比地球上的淡水少得多。地球上的淡水要少得多。许多动植物需要这种淡水才能生存。

Some of this fresh water is above ground. While other fresh water is underneath earth's surface, what are some ways you use earth's water?

Different Forms of Water

地上有淡水。虽然地球表面还有其他淡水，但是你怎么用地球水呢？

不同形式的水

液态水是地球水最常见的状态。它的形状和它所在的容器一样。液态水总是在流动。即使你看不到它在流动，它也会像波浪一样在河流和溪流中流动和坍塌。

Not all water is liquid. When liquid water gets very cold, it freezes to form ice, ice is another state of water, solid water. Ice can float on liquid water. People form ice into different shapes, artists even carve ice to make sculptures.

much of earth's frozen water is at the North and south poles earth's coldest areas.

不是所有的水都是液体的。当液体水变得非常冷时，它会结冰并产生冰。冰是水的另一种状态，固体水。冰可以漂浮在液体水上。人们把冰做成不同的形状，艺术家甚至把冰雕刻成雕塑。

地球上的冰水大多位于地球最冷的北极和南极地区。

Some of Earth's water is in an invisible state as a gas called water vapor. while it's always invisible, water Vapor is all around us.

changing water.

地球上的一些水是一种看不见的气体，称为水蒸气。虽然水蒸气总是看不见，但它就在我们周围。

换水。

地球上的水总是从一种状态变成另一种状态。当冷冻水被加热时，它会融化并变成液态水。当液态水冷却时，它会冻结并变成冰

When water vapor in the air cools down. It changes from a gas to a liquid. This process is called condensation, clouds are made up of tiny drops of water formed by condensation. The tiny drops stick together, creating larger heavier drops. Once they're large enough, they fall to the ground as rain Or another type of precipitation,

液态水也可以变成气体。你见过一滩水在炎热的天气里干涸吗？太阳能在挥发过程中将液体转化为气体。水从世界各地的海洋、河流、湖泊和水坑中挥发。

当空气中的蒸汽被冷却时。它从气体变成了液体。这个过程被称为冷凝，云是由冷凝形成的微妙的水滴组成的。小水滴粘在一起，形成更大更重的水滴。一旦它们足够大，它们就会以雨或其他类型的雨的形式进入道路，

water is important

rain keeps plants alive and allows them to keep growing. people. And other animals need water to survive. We also use it for other purposes, such as fighting fires,

水很重要

雨水使植物保持活力，并使它们继续生长。人类和其他动物需要水才能生存。我们还把它用于其他目的，比如灭火，

照顾好地球上的水，使废物和垃圾远离水，避免水变得肮脏和不寻常是很重要的。受污染的水会使人、植物和动物生病。你想在受污染的水中喝酒和玩耍吗？

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