What  do  know  about  the  sea?  Some  people  have seen it but others haven't. The sea looks beautiful on a fine sunny day and it can be very tough when there is  a  strong  wind.  What  other  things  do  you  know about it? Of course, the sea is very large. In the world there is more sea than land. If you have swum in the sea, you know that the sea is salty.  Rivers  carry  salt  from  the  land  into  the  sea. Some  places  of  the  sea  are  saltier  than  the  other places. Do you know the Dead Sea? It is so salty that you  can't  sink  when  you  are  in  the  water!  And  fish cannot live in it!