Warning: Any documents saved to the hard drive of this computer (the X: drive)  will be automatically deleted upon logout....
 
Earthquakes <ul><li>By: Momina Afzali </li></ul>
What are Earthquakes? <ul><li>Earthquakes are the Earth’s natural means of releasing stress </li></ul><ul><li>When the Ear...
What are Earthquakes? continued <ul><li>As the plates move they put forces on themselves and each other </li></ul><ul><li>...
Forces <ul><li>A force can be thought of as a push or pull </li></ul><ul><li>Force has both magnitude and direction, there...
 
Forces……. continued <ul><li>When a force is applied to an object, the object is said to be under stress  </li></ul><ul><li...
What causes stress?
Upcoming SlideShare
Loading in …5
×

Earthquakes Presentation

728 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
728
On SlideShare
0
From Embeds
0
Number of Embeds
16
Actions
Shares
0
Downloads
11
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Earthquakes Presentation

  1. 1. Warning: Any documents saved to the hard drive of this computer (the X: drive) will be automatically deleted upon logout.   Please save all documents to removable media (floppy drive is A:, CD drive is F:, USB jump drive is G:). Please save your work regularly to avoid potential data loss. The library is not liable for any data loss that results from use of this machine.
  2. 3. Earthquakes <ul><li>By: Momina Afzali </li></ul>
  3. 4. What are Earthquakes? <ul><li>Earthquakes are the Earth’s natural means of releasing stress </li></ul><ul><li>When the Earth’s plates move against each other, stress is put on the lithosphere </li></ul><ul><li>When this stress is great enough, the lithosphere breaks or shifts </li></ul>
  4. 5. What are Earthquakes? continued <ul><li>As the plates move they put forces on themselves and each other </li></ul><ul><li>When the force is large enough, the crust is forced to break </li></ul><ul><li>When the break occurs, the stress is released as energy which we feel and call an earthquake </li></ul>
  5. 6. Forces <ul><li>A force can be thought of as a push or pull </li></ul><ul><li>Force has both magnitude and direction, therefore it is a vector </li></ul><ul><li>From physics and Newton’s 2 nd law, we know that force is equal to a change in an object’s momentum which describes the quantity of motion </li></ul>
  6. 8. Forces……. continued <ul><li>When a force is applied to an object, the object is said to be under stress </li></ul><ul><li>Stress is the deforming force per area </li></ul><ul><li>Stress and strain are related, so it is easy to determine one from the other if you know value of proportianality, a constant value that relates strain to stress, of the substance that is being deformed </li></ul>
  7. 9. What causes stress?

×