The Tectonic Plates L.O – To be able to name the different types of plate boundaries and explain how they shape the Earth’s surface.

How convection Currents work Fill in the blanks in your book! The ____ is the hottest part of the Earth. The magma that is near the core is _____up. This makes it ____. As it rises up, it gets nearer the_____. The crust is cool. This ____the magma and the magma begins to ___back down. When it gets back to the core it is heated up and rises again. This happens over and over again in a________. This movement is called a ________ _________. It is these currents that make the plates move. convection current core circle heated drop rise cools crust

Tectonic Plates and Convection Currents The crust is also broken up into tectonic plates, which ‘float’ on the mantle. Heat rises from the centre of the planet, starting convection currents . The currents are slow, but they push the plates in different directions, causing them to crash into one another or move apart. This is what causes volcanoes and earthquakes on the earths surface.

Types of Plate boundary Convergent Two plates move ________ each other. Where they meet, the heavier plate is __________ under the lighter plate. Ocean to continent Ocean to ocean Continent to continent towards subducted

Convergent plate boundary - Ocean and Continental plates

Skill: Drawing an annotated diagram What should a good diagram include? Title Drawn in pencil Neat Annotations (labels that explain)

Types of Plate boundary Divergent Two plates move ________ from each other and create new crust, usually in the middle of oceans. apart

Divergent plate boundary

Divergent Two plates move apart from each other and create new crust, usually in the middle of oceans apart

The Mid-Atlantic ridge Sea Floor Spreading! Fun Fact! Did you know that the ocean floor in the Atlantic is growing by 3cm per year? Can you see which of the following pairs of continents are moving further away from each other? Europe and Africa Europe and North America South America and North America

Types of Plate boundary Conservative Two plates move ________ each other. No new plate is created or destroyed, and no landforms appear. alongside

Collision boundaries occur when 2 plates of similar densities move together (i.e. a continental plate and a continental plate). This causes the material between them to buckle and rise up, forming fold mountains. The Himalayas are an example of a chain of fold mountains. They have been formed by the African plate colliding into the Eurasian plate. Collision Boundary

Homework Question Describe the differences between divergent, convergent and conservative plate boundaries

Name this plate boundary G A B E F D C Match the labels to the letters The oceanic crust sinks under the less dense continental crust Earthquakes occur due to friction Oceanic plate The oceanic crust melts and rises Mantle Continental crust Explosive volcanoes