What is a lake? What are its signs? How do lakes differ in origin? How are lakes different from the seas?

1. Lake is a closed basin filled with water.
There are fresh and salty lakes, sewage and closed lakes.
2. Classification of lakes by origin:
-tectonic;
– glacial;
-volcanic;
-limans;
-the old lady;
-artificial;
– residual;
-walled;
– thermokarst.
3. The sea is part of the World Ocean and is always connected with it by a strait, and the lake is a closed body of water located in the deepening of the earth’s crust of the mainland