There are seven major plates in the Earth's outer shell, known as the lithosphere. These plates are:

1. African Plate

2. Antarctic Plate

3. Eurasian Plate

4. Indo-Australian Plate

5. North American Plate

6. Pacific Plate

7. South American Plate

These plates are in constant motion, driven by convection currents in the Earth's mantle. The movement of these plates is responsible for various geological phenomena, such as earthquakes, volcanic eruptions, and mountain building. The boundaries between these plates are marked by different types of geological features, such as mid-ocean ridges, subduction zones, and transform faults.