the earth was a big hot ball made up of many rocks and gases. After millions of years the outer portion of the earth coooled down. We live on this outer layer of the earth called the Crust.
crust
Crust
a fault
most volcanoes are formed from a hot spot in the earths crust.
rifts
rift valleys
rifts
magma
Pressure from the earths core
they both make up the earths crust. they are formed different.
fossil fuels
The amount of crust present on Earth always stays the same. The amount of crust descending into the mantle is balanced by the amount of crust formed at mid-ocean ridges.