How many primary tectonic plates are there on the earth?

There are 7 types of plates on Earth. The names of these plates are African plate This plate is found in the continent of Africa, Antarctic plate This plate is found in the sea adjoining the continent of Antarctica, Eurasia plate This plate covers the area of ​​Europe and some areas of ​​Asia, Indo Australian plate This plate is considered to be of great importance. This plate is a mixture of Indian and Australian,  North American Plate This plate is very large, it is in the areas of North America, Siberia, and Greenland, Pacific Plate This plate is under the Pacific Sea, South American Plate This plate is in the area of ​​South America and South Atlantic. This plate is constantly in motion, under which the earth's surface keeps on stirring.