ES WEEK 3

The force applied to a rock.

• Pangaea

• Boundaries

• Stress

Rocks are pulled apart.

Speculated that this type of stress is what separated all the continents in the world during the breaking away of the

supergiant continent called Pangea.

• Compressional stress

• Tensional stress

• Confining stress

Crust becomes compact, making it look smaller. Can cause sinkholes where the inside portion of the ground has already disintegrated without being apparent.

• Compressional stress

• Tensional stress

• Confining stress

Rocks push or squeeze against one another. The stress produced is directed toward the center. Takes place in folding,

which results in mountain building.

• Compressional stress

• Confining stress

• Tensional stress

Some of the portions of a plate at the edges may break away in different directions, eventually making the plate smaller in size. The friction caused by this stress can cause earthquakes.

• Shear stress

• Tensional stress

• Confining stress

He developed the concept and hypothesized the continental drift theory. He claimed that there used to be only one supergiant landmass (Pangea) where all the continents came from. Over time, this continent broke apart into two huge land masses moved away from each other.

• Alfred Wegener

• Edward Suess

• Arthur Holmes

It states the movement of tectonic plates, which drift apart from the land which sits on top, is the cause for this shift. When the land spread apart, it formed individual smaller landmasses known as continents.

• Continental Drift Theory

• Plate Tectonics

• Seafloor Spreading

Continental drifts are caused by?

• spreading of the seafloor

• drifting and moving apart from one another

• splitting apart and drifting into their current position

The transfer of thermal energy through the movement of a liquid or gas.

• Tectonic plate

• Continental Drift

• Thermal convection

Who suggested the continental drift theory?

• Alfred Wegener

• Arthur Holmes

• Eduard Suess