Plate boundaries

constructive boundary

two plates move apart, new crust will be formed when magma rises.

Destructive boundary

ocneaic rock sinking beneath a continental rock. Oceanic melts into manga and goes to the cracks off continental rock.

conservative boundary

two plates that move in contact but in opposite directions

collsion

two continental collide together

what can be formed in soncstructive boundary

shield volcano

weak earthquakes

ocean ridges

what an conservative boudjnary form

very strong earthquakes

what can desctructive boundary form

volcano

tsunami

mountains

what can collision form

fold mountains

strong earthquakes

How do we measure an earthquake

seismometer

what scale

richter scale

how do tsunamis form

by the force of an earthquake

how do hotspots form

when the plumes (magna from deep mantle) rises through the surface creating a volcano eruption.

why do they occur away from plate boundary

because the mantle isn’t deep enough to have plumes.