Distribution.

Convection currents.... Plate tectonics.... Plate boundary....

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Distribution

The earths crust is broken up into pieces called plates. Heat rising and falling inside the mantle creates convection currents generated by radioactive decay in the core. The convection currents move the plates. Where convection currents diverge near the earths crust, plates move towards each other. The movement of the plates, and the activity inside the earths, is called late tectonics.

Plate tectonics cause earthquakes and volcanoe. The point where two plates meet is called a plate boundary. Earthquakes and volcanoes are most likely to occur either on or near plate boundaries.

The map shows the worlds' tectonic plates and the distribution of earthquakes and volcanoes.

The earths plates move in different.

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