Forces

1)TensionTension

2)CompressionCompression

3)ShearingShearing

Tension

.

Compression

.

Shearing

.

Question?

Where do most mountains form?a) Rocky mountains

b) At the west

c) Near the edge of tectonic plates

Answer

Where do most mountains form?

c) Near the edge of tectonic plates

Folds

• Syncline• Anticline

syncline

• Syncline: a fold in a shape of a U

Anticline

• Anticline: a shape of an arch

FaultsFaults

1)normal 2)reverse 3)strike-slip

Normal FaultNormal Fault

• Normal fault: when the hanging wall has moved downward

Reverse FaultReverse Fault

• Reverse fault: when the hanging wall has moved upward

Strike-Slip faultStrike-Slip fault

• Strike-Slip fault: a fault in which surfaces are in opposite sides and have moved horizontally

Notes What forces cause

mountains to form?a.a. TensionTensionb.b. CompressionCompressionc.c. ShearingShearing Where do most Where do most

mountains form?mountains form? - Near the edge of - Near the edge of

plate tectonicplate tectonic

Notes

What are the common types of What are the common types of folds, and how might they folds, and how might they look at the surface of earth?look at the surface of earth?

a.a. AnticlineAnticline

b.b. SynclineSyncline

Notes

What are the common types of What are the common types of faults, and how might they faults, and how might they look at the surface of the look at the surface of the earth?earth?

• NormalNormal• ReverseReverse• Strike-slip Strike-slip