2. What is stress?
• Stress is the forces that push and
pull on the Earths crust, causing
its deformation.
• Stress comes in the forms of
compression, tension and
shearing.
3. What do the types of stress
do?
Stress
Compression Tension Shearing
Moves rocks close together. Pulls on the rocks of the crust. Pushes rocks in two opposite directions.
Makes rocks denser and smaller. Rocks become thinner in the middle. Rocks get twisted and they tear apart.
Rocks pushed higher up and deeper down, Volume of rocks increase, density decrease. Rocks are just bended or broken.
4. Stress and Earth
» Stress can lead to earthquakes
and faults.
» Faults can be either strike-slip
faults and thrust faults.
» Both faults and earthquakes are
dangerous to modern human
society.
5. What are faults?
Faults are breaks or cracks along which
rocks move. Faults are usually made
when shearing occurs. As I stated
before, faults come in strike-slip faults
and thrust faults as well as their normal
form which does not have a specific
name.
6. What you have learned
Answer these two questions on what
you have learned during this
presentation.
What does stress cause? Say one thing
that each of these stress-caused
occurrences do.
What are the different types of faults?
