Layers of the Earth
What are the THREE main layers based on COMPOSITION?
Crust, Mantle, Core
What layers make up the Lithosphere?
Upper mantle and Crust
Alfred Wegner looked at a map and saw this... Which started his theory of plate tectonics.
The shapes of the continents looked like they fit together like a puzzle.
Draw on your board a CONVERGENT plate boundary.
(drawings)
In the early 1900's, geologist Alfred Wegner described a process he called continental drift. He proposed that Earth's continents had once been a single landmass that had broken up, and the continents had then moved apart. At first, scientists were skeptical, but they accepted Wegner's idea when new discoveries supported it. Which term describes continental drift?
Theory
Why does density increase the deeper we go inside of Earth?
The pressure within Earth increases causing more mass to compress into a smaller volume.
The lithosphere can be separated into two parts, what are they?
Continental and Oceanic Crust
Wegner believed that evidence on the continents could help cement his theory of continental drift. What is the theory of continental drift?
The theory that the continents have moved all around the Earth over its history.
Draw on your board a TRANSFORM plate boundary.
(drawings)
The variable that is deliberately changed or manipulated in an experiment.
Independent Variable (test variable)
What represents Erath's heat source?
The core
The lithosphere is all cracked up into...
Tectonic Plates
How did Wegner use fossils of plants and animals to help prove that the continents were moving.
Fossils of the same animal were found all around the world in different climates.
What is the name of this process? (1) (17:38)
(video)
The variable that is measured in an experiment
Dependent Variable
DOUBLE JEOPARDY
Each correct answer is worth 400 points.
Heat from within the Earth causes this to occur within the mantle...
Written answer = 400 points
Drawn Diagram = 400 points
Convection
Draw 2 rectangles that represents the continental and oceanic crusts and label them.
(drawing)
How did Wegner use rocks and mountains to help prove continental drift?
The rocks within the mountains matched in age and type to other mountains around the world.
Why do most volcanoes form near the coasts?
The coast is where oceanic plate subducts under continental plates.
What is the Test Variable (Independent Variable) in the sentence below?
"If the wind blows, then the kite will fly."
The wind
Why is the Outer Core liquid and the Inner Core solid?
The heat overtakes the pressure in the outer core and causes the layer to be in liquid form.
The pressure overtakes the heat within the inner core causing the inner core to remain solid.
Scientist 50 years ago didn't know what was moving the lithosphere. Today we have a good idea as to what force could be strong enough to move such a large layer. Describe this force.
Convection within the Asthenosphere.
Why was Wegners theory of Continental drift not accepted?
He did not have an explanation for what was causing the plates to move.
Why do 2 continental plates form a mountain when they converge?
Because they are the same density.
What is the Dependent Variable in the sentence below:
"The higher i drop the ball, the higher the ball will bounce."
The height the ball bounces.