Question

The earth's crust is unstable explain its two effects of the earth's surface

Answer 1

1)The earthquakes are caused due to the movement of tectonic plates which form the earth's crust
2)This results in folding and faulting of landmass responsible for formation of mountains

Answer 2

here's is your answer...
The two effects on earth surace is disasters,Tsunami.Due to increase of temperature in layers of earth theearth surface gets heated and cause damage of layers of earth and this leads to disastets and tsunami. So,these are two effects of earth's crust.Due to unstabiling of earth ,many tsunami's are occuring...
hope this helps you...