Exam 1 Flashcards
(100 cards)
Compression
Action of oppositely directed forces acting towards each other at the same time.
Scientific Method
Observation
Hypothesis
Prediction
Testing
(Ex)Tension
Action of coinciding and oppositely directed forces acting away from each other.
Shear
Action of coinciding and oppositely directed forces acting parallel to each other across surface.
Earthquakes
Vibrations caused by a sudden release of energy, usually as the result of the displacement of rocks along faults.
Compression=?
Reverse Fault
Shearing=?
Strike Slip Fault
(Ex)Tension=?
Normal Faults
Fault
A fracture along which movement has occurred parallel to the fracture surface.
What causes faults to form?
When rocks experience stress.
Dip-slip faults examples
Normal
Reverse
Strike Slip Fault examples
Right, left lateral
Dip-Slip faults
Up or down direction along the fault plane.
Normal Fault
Puts stress on it and pulling rock apart.
Hanging wall moves down relative to Foot Wall.
Reverse Fault
Hanging wall moves up along Foot Wall
Strike Slip Fault has?
No vertical Displacement
Body waves
Travel through solid body of the Earth.
Surface waves
Travel along the ground surface and move slower than P and S waves, but can produce severe ground movements
Two types of Seismic Waves
Body Waves
Surface Waves
The Magnetosphere surrounds?
The Earth
What Methods do people use to study Earths Interior?
Drilling
Radar Frequencies
Earthquakes
Epicenter
The geographic location on Earth’s surface directly above the Earthquake focus.
P-waves
Can travel at 4-6 km through liquid and solids.
Side to side motion
S Waves
(Shear Waves) travel at 3-4 km/sec
Can’t travel through liquids, useful for inferring the physical state of rocks below Earths Surface
Up and Down motion