CRCT QuestionThe intensity of an earthquake is
partly determined by the
a. Gap hypothesis b. Amount of damage it causes c. Fault type d. Seismic waves
Corny Joke of the Day
How does the ocean pay it’s water bills?
With sand dollars!
Can you categorize into three groups
convergent
divergenttransform
Shearing
tension
compression
squeezingApart
slide
mountains
earthquakes
Mid-ocean ridge
True or
False
Study Guide Answers
1. Describe the following types of plate boundaries, the stress associated with each
one of them, and what types of events or features can occur at the boundary
Convergent
Compression (squeezes) Collide Mountains
Divergent
Tension Apart Mid-ocean ridges/rift valley
Transform
Shearing Slide horizontally Earthquake
2. What is the mid-ocean ridge and at what type of boundary
does it occur?
An area where molten material is coming up from two OCEANIC plates
pulling apart.
Shield volcano….slow moving lava
Divergent boundary
3. What is deformation
Any change in the volume or shape of Earth’s crust
4. What is stress, and what does it cause?
Stress is a force.
It causes deformation because it will change the volume and/or density
Tension, compression, shearing
5. 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
6. Where do earthquakes occur?
Near edges of plate boundaries
7. What is a fold?
Bending of Earth’s crust
*Produces mountains
8. What is a fault
Breaking of Earth’s crust
*Produces earthquakes, mountains, rift valleys
9. Explain what the magnitude of an earthquake and how is it
determined. Magnitude is the Earthquake’s
strength based on seismic waves.
Measured using the richter scale…which uses a seismograph
Reminder
Intensity= amount of damage the earthquake causes!
10. What scale is used to measure the strength of an
earthquakeRichter scale
11. List and describe the three types of seismic waves
All three are waves of energy from earthquakes that will travel through
the Earth
P waves
Primary Waves Travel the fastest Travel through solids, liquid, and
gases
s waves
Secondary Waves Come in after primary Travel through solids
l waves
Surface Waves Travel the SLOWEST On the surface CAUSES THE MOST DAMAGE
12. What is the difference between the epicenter and
focus?Focus is BELOW the Earth
Epicenter is ABOVE it on the surface
*Where the fault takes place
13. Give 3 examples of way to protect yourself during an
earthquakeIf inside: crouch under a table or desk
14. Why can earthquakes not be predicted by geologist?
They can’t be sure when and where stress will be released along the fault
15. Where do volcanoes form?
1. Along convergent boundaries where the plates are subducting….
2. Hot spots (Hawaii)
16. Why does magma flow up through rock?
Because it’s less dense then the rock around it
17. What type of eruption will a volcano with magma high in
silica cause?What’d you find?!?!?!?!
18. What is the ring of fire?
A belt of volcanoes around the pacific ocean
19. What can you conclude about the relationship between
earthquakes and volcanoes?If small earthquakes in the area near a
volcano, they will infer that the volcano is probably about to erupt.
Survivor
Question
When plates slide past one another this is what type of boundary?
Answers
Transform
Question
When plates collide this is what type of boundary?
Answers
Convergent
Question
What happens to a rock if it’s undergoing shearing?
Answers
Bends and breaks
Question
What is it called when that Earth BENDS?
Answers
Folding
Question
Squeezing an object describes what kind of stress?
Answers
Compression
Question
Before Lava hits it is called:
Answers
Magma
Question
A volcanic belt that circles the Pacific Ocean is called:
Answers
Ring of Fire
Question
What does stress cause?
Answers
Deformation
Question
What kind of energy could be produce through the heating of ground water
from volcanoes?
Answers
Geothermal
Question
The mid-ocean ridge is at what type of boundary?
Answers
Divergent
Question
What type of seismic wave does the most damage?
Answers
Surface
Question
What is an example of a volcanic island being formed over a hot spot
rather than at a plate boundary?
Answers
Hawaii
Question
Which seismic wave can travel only through solids?
Answers
S Waves