Science Chp. 6 lesson 1-3 vocab

When the circulation of material is caused by differences in temperature or density.

Mountain ranges in the middle of the ocean

A state in which magnetized objects would reverse direction and orient themselves to point south

The magnetic field reverses direction.

Forms where two plates collide.

All continents were in constant motion on the surface of the earth

The process by which new oceanic crust forms along the Mid-ocean ridge and old crust moves away from the ridge.

A state in which magnetized objects, such as compass needles, would orient themselves to point north

All the continents were once one supercontinent

Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force...

Forms where two plates separate.

The cold rigid outermost rock layer

Earth’s surface is made of rigid slabs of rock,or plates, that move with respect to each other.

Forms where two plates slide past each other.

As a slab sinks, it pulls on the rest of the plate with a force

When the denser plate sinks below the more buoyant plate