Plate Tectonics Daily Two

Earth Science

McLane High School

Plate Tectonics Daily Two 12/1,2

Q. What are the three main parts of the geosphere?

A. Crust, Mantle, Core

Q. Why is the solid earth layered?

A. Density differences

Objective: Recall basic information about the solid earth

Plate Tectonics Daily Two 12/3,4Objective: Understand the evidence supporting continental drift

What is the lithosphere composed of?

Upper mantle + crust

How is the asthenosphere different from the lithosphere?

Squishy,

Higher density,

Hotter

Squishy

Crunchy

Plate Tectonics Daily Two 12/5,8

What types of evidence did Alfred Wegener use to support his Continental Drift hypothesis?

Puzzle Fit

Fossils

Mountain Ranges

Glaciers

What is the continental drift hypothesis?

The idea that the continents had once been joined to form a single supercontinent - Pangea

Objective: Understand the evidence supporting continental drift

Plate Tectonics Daily Two, 12/9,10Objective: Understand the historical perspective of the Continental Drift Hypothesis

Why did the scientists in the early 1900s reject Wegener’s Continental Drift Hypothesis?

What new evidence has been found to support Wegener’s ideas?

– Ocean Floor Magnetism

– Earthquake Data– Hot Spots– Ocean Drilling