Volcanoes are vents in the Earth's crust where magma forces its way to the surface, expelling ash and gases. Magma forms deep underground due to heat and pressure melting rock. It is less dense than the surrounding rock so rises toward the surface. Volcanoes form at divergent plate boundaries as plates move apart and magma rises, at convergent boundaries as colliding plates push magma through cracks, and above hot spots from stationary pools of underground magma.

1. Volcanoes

2. WTH are Volcanoes?
O A volcanois a vent inthe earth’s crust wheremagma
forces is way to the surface
OAsh and gases arealso expelled

3. How doVolcanoesForm?
ODeep inside the earth,heat and pressure
cause rock to melt and form magma
OMagma is less dense than therocks around it
so it is forced upward towards the earth’s
surface

6. DivergentPlateBoundaries
OWhen2 ContinentalPlates move apart,
magmarises to thesurface

7. ConvergentPlateBoundaries
OWhen2 plates collide and theother plate is pushed up,
magmafinds its way throughthe cracks or weakness of the
crust

8. Hot Spots
OA stationary pool of magma