What do you know about the sea? Everyone knows the sea looks beautiful when the sun is shining on it. In fact, it becomes very terrible when there is a strong wind.

The sea is very deep. In some places, the sea is much deeper. The highest mountain in the world is about 9 kilometers’ high, but the deepest place of the sea is about 11kilometres’ deep.

 The sea can be very cold. At the top of the sea the water may be warm. But if you go down, it becomes colder and colder. In most places of the sea, there are lots of fish and plants. Some live near the top of the sea. Others live deep down. But in some places of the sea, no fish can live at all.