Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 19 Vocab.

TermDefinition
stress forces per unit area that act on a material - compression, tension, and shear.
strain deformation of materials in response to stress
elastic deformation causes materials to bend and stretch; proportional to stress, so if the stress is reduced or returns to zero the strain or deformation is reduced or disappears.
plastic deformation permanent deformation caused by strain when stress exceeds a certain value.
fault fracture or system of fractures in Earth's crust that occurs when stress is applied too quickly or stress is too great; can form as a result of horizontal compression (reverse fault), horizontal shear (strike-slip fault), or horizontal tension (normal fau
seismic wave the vibrations of the ground during an earthquake.
primary wave seismic wave that squeezes and pushes rocks in the same direction that the wave travels, known as a P-wave.
secondary wave seismic wave that causes rock particles to move at right angles to the direction of the wave, known as an S-wave.
focus point of the initial fault rupture were an earthquake originates that usually lies at least several kilometers beneath Earth's surface.
epicenter point on Earth's surface directly above the focus of an earthquake.
seismometer instrument used to measure horizontal or vertical motion during an earthquake.
seismogram record produced by a seismometer that can provide individual tracking of each type of seismic wave.
Richter scale numerical rating system used to measure the amount of energy released during an earthquake.
magnitude measure of the energy released during an earthquake, which can be described using the Richter scale.
amplitude the size of the seismic waves; an increase of 1 in the scale represents an increase in amplitude of a factor of 10.
moment magnitude scale scale used to measure earthquake magnitude - taking into account the size of the fault rupture, the rocks' stiffness, and amount of movement along the fault - using values that can be estimated from the size of several types of seismic waves.
modified Mercalli scale measures earthquake intensity on a scale from I to XII; the higher the number, the greater the damage the earthquake has caused.
soil liquefaction process associated with seismic vibrations that occur in areas of and that is nearly saturated; resulting the ground behaving like a liquid.
tsunami large, powerful ocean wave generated by the vertical motions of the seafloor during an earthquake; in shallow water, can form huge, fast-moving breakers exceeding 30 m in height that can damage coastal areas.
seismic gap place along an active fault that has not experienced an earthquake for along time.
Created by: cynthiagzz
Popular Earth Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards