Alfred Wegener (1910 ) Continental Drift

Slides:

Advertisements

Similar presentations

Sea-Floor Spreading.

Advertisements

Continents change position over time

Check your notes for key ideas!

In the mid-1900’s, scientists realized that the ocean floor had many mountain ranges similar to those on the continents. These underwater mountain ranges.

Sea Floor Spreading Chapter 4.4. What is the mid-ocean ridge? What do we use to map the mid-ocean ridge? The mid-ocean ridge is the longest chain of mountains.

Sea-Floor Spreading Copy the following map of the ocean floor between continents. Label the parts of your map as we go along.

Sea-Floor Spreading. Was Wegener Right? Recently, new technology has given us new clues into drifting continents. Wegener’s theory of drifting continents.

The Theory of Sea Floor Spreading Page 99. Sea Floor Spreading Harry Hess (1960) as the ocean floor spreads apart, new crust material rises from the mantle.

Continental Drift: The Beginning of Plate Tectonics

Chapter 1, Section 4 Pages 33-39

Plate Tectonics Seafloor Spreading. Plate Tectonics 4 – Name the four main layers of the earth from inside to outer most layer. 3 – Name the three physical.

On your puzzle from last class: Answer the following questions in COMPLETE sentences: 1.What five pieces of evidence supports Wegner’s Theory of Continental.

Sea Floor Spreading Year 1 Science. Sea Floor Spreading  Harry Hess created the theory of sea-floor spreading  The theory states the following: -The.

9-4 Sea Floor Spreading What is the process of sea-floor spreading?

Plate Tectonics and Continental Drift. Continental Drift Alfred Wegener believed that the continents were once connected. This large continent was called.

Section 4: Sea-Floor Spreading

Sea Floor Spreading Inside Earth Ch. 1.4

Sea-Floor Spreading. Introduction Tube Worms - live in the Pacific Ocean about one mile deep near the hydrothermal vents.

Ch5 Sec4 Sea-Floor Spreading. Key Concepts What is the process of sea-floor spreading? What is the evidence for sea-floor spreading? What happens at deep-ocean.

Sea-Floor Spreading Chapter 1, Section 4 Pages

Sea Floor Spreading Chapter 1-4.

Sea- floor Spreading Scientists have mapped the ocean floor and mid-ocean ridge using S.O.N.A.R. Sound waves bounce off the underwater objects and then.

Sea-floor Spreading Section 1.4. Mid-Ocean Ridges In the mid 1900’s scientists discovered that the ocean floor is not flat. huge mountains deep trenches.

Plate Tectonics. Theory of Plate Tectonics Meaning – “plate structure” Developed – 1960’s (50 years after Wegener) The Earth is divided into approximately.

Continental Drift Notes

Seafloor Spreading Lab

PLATE TECTONICS.

Sea-Floor Spreading.

Continental Drift: The Beginning of Plate Tectonics

Sea Floor Spreading The Mid-ocean Ridge.

Sea Floor Spreading The Mid-ocean Ridge.

Evidence after wegener: seafloor spreading and PALEOMAGNETISM

Section Sea Floor Spreading Reading Notes 1

LEQ: What is subduction, where does it occur, and why does it happen?

Sea-Floor Spreading.

Continental Drift & Plate Tectonics Notes

Sea Floor Spreading Assignment # 23

Warm-Up January 21 Write What You Know!

Sea-Floor Spreading Pages

Sea Floor Spreading The Mid-ocean Ridge.

Review from yesterday!.

During the 1940s and 1950s, using technology developed during World War I, scientists began using sound waves to map the ocean floor.

Pop Quiz: Explain the theory of continental drift

Sea- floor Spreading The longest chain of mountains in the world is the Mid-Ocean Ridge. Scientists have mapped the ocean floor and mid-ocean ridge using.

Sea Floor Spreading Chapter 4.4.

Sea-Floor Spreading.

Sea-Floor Spreading.

Continental Drift and Seafloor Spreading Notes

Evidence found and Wegener Redeemed

Inside Earth Section 1.4 Pages 33-39

Do Now: Video Clip While watching the following clip answer the following: Is it possible for our oceans to be splitting apart? Is there a name for this?

EQ: What is the process of sea-floor spreading?

Sea-Floor Spreading.

Sea Floor Spreading EQ:What is seafloor spreading and how does it account for the movement of continents?

Do Now: Video Clip While watching the following clip answer the following: What did Harry Hess discover? What did he call his discovery?

Part 2 of # 8 Continental Drift and Plate Tectonic Notes

Sea-Floor Spreading And the Mid Ocean Ridge.

Sea Floor Spreading The Mid-ocean Ridge.

Why was Wegener´s hypothesis rejected?

Sea-Floor Spreading.

Sea-Floor Spreading.

Sea-Floor Spreading.

Seafloor Spreading Notes

Sea-Floor Spreading.

Sea Floor Spreading.

Sea-Floor Spreading.

Sea-Floor Spreading.

Sea-Floor Spreading. Tubeworms have no mouth, eyes, or stomach ("gut"). Their survival depends on a symbiotic relationship with the billions of bacteria.

Sea-Floor Spreading.

Seafloor Spreading.

Presentation transcript:

Alfred Wegener (1910 ) Continental Drift

Continental Drift Evidence

Harry Hess (1960’s) Sea Floor Spreading Q. 1) Who studied sea-floor spreading and when? Harry Hess (1960’s) Sea Floor Spreading

Q. 2) What is sea-floor spreading? The theory that molten from mid-ocean ridges creates new crust and spreads older crust apart.

Q. 3) What is subduction? When older crust is pushed into a deep-sea trench and sinks back towards the mantle.

Sea Floor Spreading Evidence The next slide will walk through the evidence…

Harry Hess’s Sea Floor Spreading Evidence #3 – Drilling Samples Shows the age of crust is younger beside MOR – proves new crust is added (& pushes sea-floor apart) = North Evidence #1 – Molten material (what pushes crust apart) MID OCEAN RIDGE OLD NEW Sea Floor Spreading MANTLE Evidence #2 – Magnetic stripes Proves molten rock comes out of MOR. The pattern can only shift in liquid (not solid crust).