From a plane we can see the fields,cities,mountains or seas
Below.If we into space,wesee more and more of the earth.
People and man-made satellites have been sent out into space to look at the earth carefully and people have learnt more about the earth in the last years.
The sea look very beautiful when the sun is shining on it.But
It can be very terrible when there is a strong wind.
The sea is very big,and it neary covers three quarters of the earth.The sea is also very deep in some places.There is one place in the sea that is about 11 kilometres deep.The highest mountain in the world is about 9 kilometres high.If that mountain was put into the sea at that place,there would be still 2 kilometres of water above it!
In most parts of the sea,there are many kinds of fishes and
Plants.some live near the top of the sea.Other live deep down.
There are also a lot of small living things,and lots of fishes live by eating them.
The sea can be very cold.The further people go down,the sea becomes colder and colder.At one time only some men could go down into the deep sea.But,in 1970,five women scientists lived in the deep sea for fourteen days.