As we all know, the earth we live on is the only planet that is able to support life. Because among other planets, Earth is just the right distance from the sun to have temperature that are suitable for life to exist. Also the earth's atmosphere has exactly the right type of gases in the right amounts for life to survive. Our planet also has water on it's surface called the hydrosphere. In fact, earth is often called the "blue planet" because most of it is covered with water. This water is made up of freshwater in river and lakes, the salt water of ocean and estuaries, ground water and water vapor.
Hydrosphere is very important especially for us because this is one of our need and we use it in many ways. Drinking water is the most important to us because we will not be able to live without water.It is also one of the source of our food.And water also used for washing, cleaning, bathing, cooking and in industry. It is also used to generate electricity through hydropower. From the very beginning, water is important because each cell in a living organism is made up of almost 75% water. And without water, cells would not be able to function normally and life could not exist. We are not only the benefactor of the hydrosphere but also the animals and plants. Water provides a habitat for many animals and plants to live because many gases are dissolved in water like carbon dioxide and oxygen and others. And the presence of this substance is useful to exist life in water.And the examples of this are fishes, shrimps and other sea creatures.
One of the water's unique characteristics is it's long time to heat up and long time to cool down. And it's important because it help's to regulate temperatures in earth so that it's stay with in a range that is acceptable for life to exist. Ocean currents also help to disperse heat.
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