Task Produce an annotated world map to show the location and distribution of earthquakes, volcanoes and fold mountains Use pages 8+9 from the Atlas You have 15 minutes
You should be able to
Describe the general distribution of fold mountains, volcanoes and earthquakes
Explain how this distribution is related to movements at plate boundaries.
Understand the processes leading to the formation of rift valleys and block mountains.
Show a basic understanding of plate tectonics, describing the global pattern of plates, their structure, and be aware of plate movements - plates moving away from each other (sea floor spreading), plates moving towards each other (subduction) and plates sliding past each other.
The Structure of the Earth
Types of Crust
Oceanic crust that lies under the ocean, is mainly basalt and 5-7km thick
Continental crust 20-50km thick and composed mainly of granite; it makes up the large land masses – the continents
Continental crust is low density and “floats” on top of the mantle whereas oceanic crust is much higher density