Restless Earth By Benji Johnson, Ben Joy, Callum Barber and Philip Carr

Structure Of the Earth Made up of distinct layers, like onion The solid crust has relatively low density, sits and moves on top of mantle. The crust is thin compared to the diameter of the planet. The crust is made up of sections called plates, which vary in size. Continental crust is much thicker than oceanic, but is less dense.

Plate Tectonics

Plate Boundaries

Constructive Boundaries

Conservative Boundaries

Destructive Boundaries

Collision Boundaries

Volcanoes and Earthquakes

Examples of Volcanoes and Earthquakes Kashmir Loma Prieta Montserrat Laki

Earthquakes

How do they occur? Formed when plates get stuck due to friction and then slip releasing energy

Earthquakes Kashmir 2005 Richter scale-7.6

Earthquakes Loma Prieta 1989 Richter scale-6.9

Famous Earthquakes Japan 2011 – 8.9 magnitude on Richter Scale

How ready is San Francisco? SF Will be hit, in the next few years, by the Big One. An earthquake three times more powerful than Loma Prieta. lies on the San Andreas Fault where big, sudden movements occur Although firefighters and police train regularly, everything is not ready. The bridges and hospital may not be able to cope with the earthquake. Scientists say that there is a 2 in 3 chance of a “Big One” by 2032.

Volcanoes

Volcanoes – What are they? Formed at destructive or constructive plate margins Erupt lava Large mountains

1.Destructive boundaries Subduction occurs Material melts into molten magma of mantle Weak crust melted away Surface volcano formed 2.Constructive boundaries Plates move apart Ocean trench made Magma comes through Seabed volcano formed How are they formed?

Tectonic activity Magma under high pressure Pressure released, lava erupts from volcano Like shaking a fizzy drink and opening it Why do they erupt?

Types of volcano ShieldComposite Super

Where are the Earth’s volcanoes?

Active Dormant Extinct States of volcanoes

Volcanoes Laki

Volcanoes Montserrat 1995

QUIZ

1)What two metals is the core mostly made up of ?

2) What tectonic plate are we on ?

3) Give an example of the hotspot theory

4) What is the largest volcano on Earth?

5) What was the magnitude of the Kashmir, 2005 earthquake?

6) What sort of magma is formed at destructive margins?

7) In what year did Mount Pinatubo erupt?

8) Name 5 objects that you would have in an emergency earthquake pack

9) What is the global distribution of volcanoes called?

10) What are the three states of volcanoes

Thanks for listening.