Earthquakes.

Slides:



Advertisements
Similar presentations
Earthquakes.
Advertisements

What is an Earthquake? Chapter 8, Section 1.
Ch – Forces Within Earth Essential Questions
How and Where Do Earthquakes Occur?
Earthquakes. (1) What causes earthquakes? It’s plate movement Movement in the crust causes stress– energy that slowly changes the shape of rock Earthquake–
By Trinidad Arroyo. This gradual accumulation and release of stress and strain is now referred to as the "elastic rebound theory" of earthquakes. Most.
 By the end of this unit, you should be able to:  Discuss stress and strain and their roles in earthquakes  Know the differences between elastic and.
Earthquakes Chapter 2 book F page 44. Vocabulary for section 1 page 44 book F Stress Tension Compression Shearing Normal fault Reverse fault Strike-slip.
Unit 1.4 Earthquakes. Where do earthquakes Occur? Earthquakes can occur near the Earth’s surface or far below the surface. Most earthquakes occur at plate.
Section 19.1 Forces Within Earth
Earthquakes. What are Earthquakes?  Earthquakes are.
 stress -a force that acts on rock to change its shape or volume. 3 Types of Stress  tension -pulls on crust, stretching rock so it becomes thinner.
Chapter 19.  Most Earthquakes are the result of movement in the Earth’s crust at the tectonic plates.  Rocks in the crust resist movement and build.
EarthQuakes.
 By the end of this unit, you should be able to:  Discuss stress and strain and their roles in earthquakes  Identify and describe the 3 types of faults.
8.1 Earthquakes.
Chapter 19 - Earthquakes.
Chapter 12, Section 1 Chapter 10, Section 2 Objective 1
Guided Notes for Forces Within Earth
 These terms must be included in your foldable for home work ◦ Seismology ◦ Deformation ◦ Elastic rebound ◦ Seismic waves ◦ P waves ◦ S waves.
Faults & Stress Write everything in BLUE!
Chapter 19 - Earthquakes Forces within Earth.
A whole lot of shake’n going on!
Chapter 8 Section 1 Earthquakes: Vibration of Earth created when there is a rapid release of energy Caused by slippage along a fault Faults are fractures.
Chapter 19 Pg. 526 Earthquakes.
Earthquakes The shaking of the Earth’s crust caused by a release of energy. The major cause is the build up of stress between two lithospheric plates.
Chapter 5 section 1 Objective: Determine where earthquakes come from and what causes them Identify different types of earthquakes Describe how earthquakes.
What are Earthquakes? The shaking or trembling caused by the sudden release of energy Usually associated with faulting or breaking of rocks Continuing.
Earthquakes. What are earthquakes? The word earthquake means exactly what it says. An earthquake is when the ground shakes as a result of energy being.
Unit 4 Lesson 5 Earthquakes Copyright © Houghton Mifflin Harcourt Publishing Company.
EARTHQUAKES Lesson 8.1. WHAT IS AN EARTHQUAKE  Each year more than 30,000 earthquakes occur worldwide that are strong to be felt.  An earthquake is.
Earthquakes A sudden shaking of earth as rocks break along a fault or plate boundary A sudden shaking of earth as rocks break along a fault or plate boundary.
Earthquakes. Earthquakes Our Definition: a sudden shaking of the ground because of movement within the earth’s crust.
Earthquakes: Earth’s Way of Releasing Stress Chapter 8: Earthquakes.
Earthquake By: Carlos, Frances, Valeska, Jason. What is an Earthquake? Earthquake – Is the vibration of Earth produced by the rapid release of energy.
Earthquakes. earthquakes Earthquakes are natural vibrations of the ground caused by movement along gigantic fractures in Earth’s crust or by volcanic.
Earthquakes Stress Relief. Earthquakes & Plate Tectonics Rocks break & move along surfaces called faults Rocks break & move along surfaces called faults.
Topic: What Causes Earthquakes? PSSA: A / S8.D.1.1.
What is an Earthquake? Goal 
Unit 4 Lesson 5 Earthquakes
Unit 4 Lesson 5 Earthquakes
EARTHQUAKES .
What are Earthquakes? The shaking or trembling caused by the sudden release of energy Usually associated with lithospheric plates moving against each other.
Ch.5, Sec.1 - What Are Earthquakes?
8.1 – What is an Earthquake?.
Earthquakes 2017.
Earth Quakes.
Aim: What causes an Earthquake?
Section 1: Forces Within Earth
What are Earthquakes? The shaking or trembling caused by the sudden release of energy Usually associated with faulting or breaking of rocks Continuing.
Let’s Focus What is an earthquake?
Click on picture for video
Ch.5, Sec.1 - What Are Earthquakes?
What are Earthquakes? The shaking or trembling caused by the sudden release of energy Usually associated with faulting or breaking of rocks Continuing.
Do First Questions: What mechanical layer of the Earth are plates made of? What mechanical layer of the Earth is moving causing the plates to move?
Section 1: Forces Within Earth
What is an Earthquake? Pgs
Unit 4 Lesson 5 Earthquakes
Do First Questions: What mechanical layer of the Earth are plates made of? What mechanical layer of the Earth is moving causing the plates to move?
Unit 4 Lesson 5 Earthquakes
V. Fault Mechanisms and Earthquake Generation
Forces in the Earth.
Earthquakes MT 5.
Earth Science Notes Earthquakes.
Chapter 8 Earthquakes: Bell Ringer-
EARTHQUAKES Chapter 16 pg. 426.
Earthquakes.
Earthquakes & Seismic Waves
Bell ringer (write the question)
Earthquakes February 2013.
Presentation transcript:

Earthquakes

Sumatra December 26, 2004 9.1

Before

After

Haiti January 12, 2010 7.0 230,000 dead 300,000 injured 1,000,000 homeless

Chile February 27, 2010 8.8

China April 14, 2010 7.1

Where he lived was above the epicenter of a massive quake. 8.9 magnitude 70,000 dead Pulled his classmates from the building.

Japan March 11, 2011 9.0

http://www.bbc.co.uk/news/world-asia-pacific- 12716204 http://www.abc.net.au/news/specials/japan- quake-2011/

Earthquakes

What are Earthquakes? Earthquakes are the Earth's natural means of releasing stress.

What are Earthquakes? As the plates move they put forces on themselves and each other. When the force is large enough, the crust is forced to break.

What are Earthquakes When the break occurs, the stress is released as energy which moves through the Earth in the form of waves, which we feel and call an earthquake.

What causes the stress? When two plates interact at their boundaries they put forces on each other. There are three main forces that drive deformation within the Earth and create the stress that causes earthquakes. Compressional Stress Tensional Stress Shear Stress

Which of the following things are elastic? Pasta Rubber bands Rocks

Elasticity Elasticity is when you change the shape of something and when you release the stress, it goes back to its original shape. Rocks have elastic properties

Elasticity When forces are applied to rocks, such as pulling, pushing, twisting, or compression, they change their shape. Once the rock reaches its elastic limit, it breaks and returns to an undeformed shape. We can use the elastic properties of rock to explain how energy is stored and released within the Earth’s crust.

Elastic Rebound Explains how energy is stored in rocks Rocks bend until the strength of the rock is exceeded Rupture occurs and the rocks quickly rebound to an undeformed shape Energy is released in waves that radiate outward from the fault