Question

Distinguish among compressional, tensional, and shearing forces?

Answer 1

There are three main forces that drive deformation within the Earth. These forces create stress, and they act to change the shape and/or volume of a material. The following diagrams show the three main types of stress: compressional, tensional, and shear. Stress causes the build up of strain, which causes the deformation of rocks and the Earth's crust.

Compressional stresses cause a rock to shorten. Tensional stresses cause a rock to elongate, or pull apart. Shear stresses causes rocks to slip past each other.

Answer 2

Answer:

These are the stresses or forces that affect the earth’s crust. The compression causes the rocks to squeeze or push against each other. Tension causes the opposite commotion, rocks are pulled apart. Shearing happens when two seismic plates Rub against each other leading to the breakdown of anyone.

Explanation:

• Compression generally acts on the center of rocks and causes either vertical or horizontal orientation.
• In the case horizontal, rocks get thick and short while in vertical, rocks get thin and break off.
• Mountains serve as the best example of compressional force.
• The tensional force acts in two ways, either separating any two plates farther away or stretching the ends of one plate in a different direction.
• The breakdown and movement of the ancient continent Pangea into seven further continents is an example of tensional force.
• Shearing forces are the cause of earthquakes. This force pushes the plates in opposite directions and generates friction among them.

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