Question

Which processes are caused by convection currents in the mantle? Check all that apply.

Answer 1

Answer:

slab push, volcanic eruptions, and subduction

Explanation:

To understand better, let's consider an example. Make small pieces of paper and put them in a bowl containing water. Then heat the bowl. After sometime, you will see that the pieces are moving. This is because of same phenomenon (convection currents) forming inside the bowl of water. The water will warm move upward whereas colder water will come to its place. Convection currents in Earth are formed due to high temperature of magma (molten rock material) that rises up and colder magma takes its position.

This process results in slab push, volcanic eruptions, and subduction.

Slab pull: Slab pull is the force exerted by plates during subduction. Subduction is a process when a denser plate moves beneath the less denser plate. Thus slab pull is also caused by convenction currents.

Volcanic eruption: During subduction, denser plate moves beneath the less denser plate until it reaches magma. There, the lithosphere destroyes. On a weaker lithosphere zone, the magma moves upward and break the crust thus leading to volcanic eruptions.

Subduction: As mentioned above, during subduction, denser plate moves beneath the less denser plate which is driven by convectin currents.

Answer 2

Answer:

ridge push

slab pull

subduction

Explanation

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