E&U L6
Upcoming SlideShare
Loading in...5
×
 

E&U L6

on

  • 1,164 views

 

Statistics

Views

Total Views
1,164
Views on SlideShare
1,143
Embed Views
21

Actions

Likes
0
Downloads
9
Comments
0

1 Embed 21

http://www.school-portal.co.uk 21

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

E&U L6 E&U L6 Presentation Transcript

  • Lesson 6 Continental Drift, Earthquakes & Volcanoes
  • Learning Outcomes You will be successful if you can: • Describe the reasons as to why earthquakes and volcanoes are unpredictable. • Recall that earthquakes, volcanoes and mountain building occur at the edges of tectonic plates. • Be able to describe how the movement of tectonic plates contribute to the rock cycle.
  • The Earth’s outer layer is made up of a dozen giant SLABS of rock, and some smaller ones. These are called TECTONIC PLATES.
  • There are more than 30 000 earthquakes every year! Usually ONE of these is very destructive. KOBE, Japan 1995
  • The tectonic plates can move in 3 ways: MOVE AWAY from Earthquakes are common at all each other. Usually moving plate boundaries. The under the sea, at most destructive happen at OCEANIC RIDGES. subduction boundaries: these may cause TSUNAMIS. PUSH TOGETHER in a squashing movement, making mountains like the Himalayas. SLIDE PAST each other, like the San Andreas fault in California.
  • Destructive Constructive margin margin
  • A volcano is a vent (or valve) in the Earths surface. It erupts magma, which forms lava or ash. They are also common at PLATE BOUNDARIES, where the Earth’s crust is stretched, compressed or uplifted.
  • Review Crust Mantle Core Heat Low density Tectonic plates Africa S America Rock types Oceanic Plate Fossils High Density Subduction Earthquakes Magnetic Continental Radioactive reversal plate Decay pattern
  • Homework Complete the Geohazards project on Uniservity