The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent ... move at a rate of one to two inches (three to five centimeters ...

Four types of plate tectonic activity are ... Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock, to rise from the Earth's ...

New crust is continually being pushed away from divergent boundaries (where ... other pieces of Earth's crust. The boundary where the two plates meet is called a convergent boundary.