earthquake and volcanoes test Flashcards
Divergent Boundry
Away
Rift Valley/mid ocean ridge
Tension
Convergent Boundry?
Collide
Mountain
Compression
Transform Boundry.
Slide ( horizontal)
Earthquake
Shearing
What is the mid-ocean ridge and at what type of boundary does it occur?
An area where molten material is coming up from to Oceanic plates pulling apart. Shield…..slow moving moving lava
Divergent Boundry
What is deformation?
The bending, breaking, and the tilting of the earth. The change of rock is in response to stress.
What is stress, and what does cause?
The push or pull, force, pressure of the earth’s surface. It causes deformation.
List and describe the three different types of stress that can occur to the Earth
Compression:• Squeezes the rock•Convergent boundary•Builds mountains (folds) Tension: • Rocks being pulled apart •Divergent boundary •Oceanic=mid ocean ridges •Continental=rift valleys Shearing: • Slides •Rock will bend and break •transform boundary •Earthquakes
Where do earthquakes occur?
At faults
What is a flod?
The bending of rock.
What is a fault?
A crack in the earth’s crust.
Explain what the magnitude of an earthquake is and how it is determined.
Magnitude is the Earthquake’s strength based on seismic waves.
Measured using the richter scale…which uses a seismograph
What is the scale used to measure the strength of an earthquake?
Richter Scale
List and describe the 3 types of seismic.
P- waves • Primary Waves •Travel the fastest •Travel through solids, liquid, and gases S- wave • Secondary Waves •Come in after primary •Travel through solids L waves • Surface Waves •Travel the SLOWEST •On the surface •CAUSES THE MOST DAMAGE
What is the difference between the epicenter and the focus of an earthquake?
Focus is BELOW the Earth
Epicenter is ABOVE it on the surface
*Where the fault takes place
Give three examples of ways to protect yourself during an earthquake.
If inside: crouch under a table or desk
Go inside if outside
Go to your basement
