Convection currents and plate movement

The Earth's crust is broken up into pieces called plates.

The crust moves because of movements deep inside the earth.

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 Earth's crust, plates move apart.

Where convection currents converge, plates move towards each other.

The movement of the plates, and the activity inside the Earth, is called plate tectonics.

Plate tectonics cause earthquakes and volcanoes.

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.

Mantle convection currents