自然水循环

Water is constantly moving around\r\n

Did you know that all the water on Earth is all that we have? It's constantly moving around in a natural cycle. Some water is easy to see in our rivers and oceans, but some water is underground or in the atmosphere.

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水在不停地流动

你知道地球上所有的水是我们仅有的东西吗?它在自然循环中不断地移动。有些水在河流和海洋中很容易看到,但有些水在地下或大气中。


Natural water cycle processes\r\n

The natural water cycle is the continuous movement of water around the world through the processes of evaporationtranspirationcondensation, precipitation, run-off, infiltration and percolation.

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自然水循环过程

自然水循环是水在世界各地的持续运动过程蒸发蒸腾作用冷凝降水径流渗透而且渗滤

What happens in the natural water cycle?\r\n

The natural water cycle uses physical processes to continually move water from the surface of the Earth to the atmosphere and back again. This cycle is also called the hydrological cycle.

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  • Evaporation is when the sun shines on water and heats it, turning it into gas called water vapour which rises into the air.
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  • Transpiration is when the sun warms people, plants and animals and they release water vapour into the air.
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  • Condensation is when the water vapour in the air cools and turns back into a liquid, forming tiny water droplets in the sky.
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  • Precipitation is when water droplets fall from the sky as rain, snow or hail.
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  • Run-off is when water flows over the ground and into creeks, rivers and oceans.
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  • Infiltration is when water falls on the ground and soaks into the soil.
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  • Percolation is when water seeps deeper into tiny spaces in the soil and rock.
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We modify and manage part of the natural water cycle to provide humans with water. This is called the urban water cycle.

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在自然水循环中发生了什么?

自然水循环利用物理过程不断地将水从地球表面转移到地球表面大气然后再回来。这个循环也被称为水文循环

  • 蒸发是当太阳照射在水上并加热它,它变成一种叫做水蒸气的气体上升到空气中。
  • 当太阳使人、植物和动物变暖,它们向空气中释放水蒸气时,就是蒸腾作用。
  • 凝结是指空气中的水蒸气冷却后变成液体,在天空中形成微小的水滴。
  • 降水是指水滴以雨、雪或冰雹的形式从天空落下。
  • 径流是指水流过地面进入小溪、河流和海洋。
  • 入渗是指水落在地上并渗入土壤。
  • 渗透是指水渗入土壤和岩石中的微小空间。

我们修改和管理部分自然水循环,为人类提供水。这被称为城市水循环。


Properties of water\r\n"}}" id="T2" class="cmp-text">

水的性质

Did you know?
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  • Water is the most common substance found on Earth. It's the only substance found naturally in 3 forms – solid (as ice), liquid (as water) and gas (as water vapour).
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  • Water is made up of tiny molecules. One water molecule, called H2O, is made up of 3 atoms – 2 hydrogen atoms and an oxygen atom. These atoms stick together due to electrical energy.
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  • Water is a solvent, which means it dissolves things. Wherever it travels, water carries chemicalsminerals  and nutrients with it. This means water is more than what we can see.
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  • Water can be tested to see if it is acidic, basic or neutral. We like our water around neutral so it doesn't corrode pipes and home appliances.
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你知道吗?

  • 水是地球上最常见的物质。它是唯一一种天然存在的三种物质——固态(冰)、液态(水)和气态(水蒸气)。
  • 水是由微小的物质组成的分子.一个水分子,叫做H2O由3组成原子-两个氢原子和一个氧原子。这些原子由于电能而粘在一起。
  • 水是溶剂,也就是说它能溶解东西。无论它走到哪里,水都带着它化学物质矿物质而且营养物质用它。这意味着水比我们能看到的更多。
  • 可以测试水是酸性、碱性还是中性。我们喜欢中性的水,这样就不会腐蚀管道和家用电器。

Water on Earth\r\n

Did you know?

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  • Earth has exactly the same amount of water as it had thousands of years ago. 
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  • The total amount of water on Earth is 1,386 million cubic kilometres.
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  • Water covers about three quarters of the Earth’s surface.
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  • 96% of the world’s water is saltwater.
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  • 3% is of the world’s water is freshwater, but most of it is frozen or not easy to get.
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  • Less than 1% of the world’s fresh water is useable.
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地球上的水

你知道吗?

  • 地球上的水量和几千年前完全一样。
  • 地球上的水总量是1386亿立方公里。
  • 水覆盖了地球表面的四分之三。
  • 世界上96%的水是盐水。
  • 世界上3%的水是淡水,但大部分是冰冻的或不易获得的。
  • 世界上可用的淡水不足1%。

Water cycle experiments\r\n

Have you ever wondered how water evaporates? Where clouds come from or where water goes after it rains? It’s all part of the water cycle.

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Try these science experiments and see for yourself.

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水循环实验

你有没有想过水是如何蒸发的?云从何而来,雨后水去何而去?这都是水循环的一部分。

试试这些科学实验,自己看看吧。


Atmosphere\r\n

Gases that surround a planet, like the air that surrounds Earth.

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大气

行星周围的气体,就像地球周围的空气。

Hydrological cycle\r\n

The cycle of water between the Earth and the atmosphere powered by the Sun. Also called the water cycle.

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水文循环

地球和大气之间的水循环由太阳提供能量。也叫水循环。

Urban water cycle\r\n

The urban water cycle is the way water is collected, used and managed in an urban environment such as Sydney.

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城市水循环

城市水循环是指在悉尼等城市环境中收集、使用和管理水的方式。

Molecules\r\n

A group of at least 2 atoms held together by strong chemical bonds.

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分子

原子团:至少两个原子由牢固的化学键连接在一起的一组

Atoms\n

A basic unit of matter consisting of a central nucleus surrounded by negatively charged electrons.

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原子

原子团物质的基本单位,由一个被带负电的电子包围的中心原子核组成

Chemicals\n

A substance made up of specific elements.

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化学物质

元素:由特定元素组成的物质

Minerals\n

A solid substance formed through geological processes that has a specific chemical composition, structure, and physical property.

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矿物质

一种通过地质作用形成的固体物质,具有特定的化学成分、结构和物理性质

Nutrients\n

A substance that provides nourishment, food or energy.

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营养物质

营养物质:提供营养、食物或能量的物质


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