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