Plate Mechanism [U1]

Question 1

Define the term “Lithosphere”.

Answer 1

The solid part of the Earth. Consists of the Crust and the most cool, soldified mantle.

Question 2

Define the term “Asthenosphere”.

Answer 2

The viscous part of Earth (semi molten) below the Lithosphere.

Question 2

This is about Internal Heating. Define the term “Radiogenic heat”.

Answer 2

Heat released during radioactive decay of elements in the crust and mantle.

Question 3

This is about Internal Heating. Define the term “Primodial heat”.

Answer 3

Heat released as the Earth is still cooling from its original formation.

Question 4

This is about Internal Heating. Solids and Liquids transfer heat by different processes. Which material uses which process?

Answer 4

Solid parts conduct heat. Liquid parts convect heat.

Question 5

Define the term “Slab Pull”.

Answer 5

As a plate subducts under another, gravity will start pulling down the plate with more force due to the weight, dragging the entire plate after.

Question 6

Define the term “Magma plume”.

Answer 6

An area of unusually high heat flow. Tectonic plates can move over it while the plume stays in place, creating chain of islands.