TECTONIC PLATES
- Created by: leilabugroon
- Created on: 10-03-18 10:34
View mindmap
- TECTONIC PLATES
- Core, ball of solid and liquid iron and nickel
- Mantle, semi-molten rock that moves slowly
- Crust, outerlayer
- Continental crust, (30-50km),thick, less dense
- Oceanic crust,(5-10 km),thinner, more dense
- Plates move because of convection currents in the mantle
- The place where plates meet are called plate margins or plate boundries
- Types of plate margins
- Destructive plate margins, where two plates are moving towards eachother
- Oceanic plate meets a continental plate, denser plate is forced down and destroyed. this creates volcanoes and ocean trenches
- Where two continental plates meet, the plates collide, and the ground is folded and forced upwards to create mountain ranges
- Constructive Margins, where two plates are moving away from eachother
- Magma rises from the mantle to fill the gap and cools, creating new crust
- Conservative Margins, where two plates are moving sideways past each other, or in the same direction but different speeds
- Crust isn't created or destroyed.
- Destructive plate margins, where two plates are moving towards eachother
Comments
No comments have yet been made