Science Lesson 6: What Makes It Move?

Question 1

TRUE OR FALSE: The driving force used in Continental Drift Theory is gravity, according to Alfred Wegener.

Answer 1

TRUE

Question 2

Who discredited the Continental Drift Theory and said the Earth is “too rigid” to drive itself?

Answer 2

Harold Jeffrey

Question 3

First-Generation Geologist and Geophysicist to accept Alfred Wegener’s theory

Answer 3

Stanley Runcorn

Question 4

Heat transferred from core to crust

Answer 4

Mantle Convection

Question 5

Transfer of heat through fluid-motion; analogy: heating water in a pan

Answer 5

Convection

Question 6

The preferred model wherein the lithosphere sinks

Answer 6

Whole-mantle convection model

Question 7

Where lithosphere moves to core-mantle boundary

Answer 7

Lithospheric Slab Terminal

Question 8

Model where layers independently work to transfer heat; process does NOT involve mixing

Answer 8

Layer-cake model

Question 9

Layer-Cake model’s 2 zones of convection:

Answer 9

1. Upper Mantle’s thin layer
2. Thicker layer below upper part

Question 10

Distinct; from deeper portion

Answer 10

Basaltic Composition

Question 11

Uniform or consistent in nature

Answer 11

Chemical Composition

Question 12

Subduction of cooler lithosphere; considered as driving mechanism of plate movement

Answer 12

Slab Pull

Question 13

Results from elevated position of oceanic ridge; slabs slide and push due to gravity

Answer 13

Ridge Push