Endogenic Processes

This type of stress is similar to compression involving two units but not really colliding, instead, they are just sliding past each other along the plane of contact.

Which among the statements about volcanic eruptions is INCORRECT?

• The difference in temperature of the magma compared to the surrounding rocks allows it to become more buoyant to rise to the surface.

• The expulsion of lava is 'quiet' or calm if volatiles already escaped before reaching the subsurface.

• The presence of too much volatiles in a limited amount of space causes the rocks around it to solidify.

The formation of magma is limited to certain regions of the planet where favourable conditions are present. Which of the following doesn't fall under favourable conditions?

• decompression

• breaking of rocks

• anomalous heat

• volatile addition

During this event, huge amounts of soil and rock break loose from the side of the volcano and fall down the mountain.

• ground tremors/earthquakes

• ground swelling

• heightened activity of steam discharge

• landslides and other mass wasting events

What do you call the process of mountain building which is usually associated with compressive stresses?

Analyze if the statement is TRUE or FALSE:

Strain is the deformation exhibited by a body that is undergoing stress.

• TRUE

• FALSE

Folds are evidences of _______ deformation in rocks while faults are _______ deformation.

• ductile, brittle

• brittle, ductile

• ductile, elastic

• brittle, elastic

What do you call the type of deformation that reverts back to its original form when the stress is removed?

Which among the types of stress is similar to a rope being pulled from both sides?

• compression

• shear

• tension

It is when convection currents go down which destroys crust back into the convection in subduction zones.

• sikning

• upwelling

• sinking

• deformation