Sea Floor Spreading. rMagnet.swf.

Slides:

Advertisements

Similar presentations

Ch Restless Continents

Advertisements

Restless Continents.

Restless Continents continental drift: the hypothesis by Alfred Wegener that states that the continents once formed a single landmass, broke up, and drifted.

EVIDENCE OF CONTINENTAL DRIFT.

Sea Floor Spreading and Continental Drift

Continental Drift, Sea Floor Spreading and Plate Tectonics

Mid-Ocean Ridges Mid-ocean ridges are an undersea mountain chain where new ocean floor is produced. In the mid-1900’s, scientists begin mapping the mid-

Check your notes for key ideas!

Plate Tectonic Makeup Bellwork

P1 – Seafloor spreading. Today you need to know 1.Explain what evidence there was to support the theory of continental drift – suggested by Alfred Wegener.

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

Sea-Floor Spreading Key Concepts

If you look at a map of the world, you may notice that some of the continents could fit together like pieces of a puzzle…..the shapes of the coastlines.

Chapter 10 Plate Tectonics. Alfred Wegener Proposed they hypothesis of continental drift Proposed they hypothesis of continental drift CONTINENTAL DRIFT-

Earth’s Interior Layers and Continental Drift. Objectives Review Earth’s layers Summarize Wegener’s hypothesis Describe the process of sea-floor spreading.

Sea Floor Spreading. Describe the Diagram Sea Floor Spreading A process in which new ocean floor is created as molten material from the earth's mantle.

12.1 Evidence for Continental Drift

3.2 Sea-Floor Spreading. Convection Currents cause the sea floor to spread.

Geology Chapter 1 Jeopardy

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.

…to go from this… …to this? Approx. 250 Million Years (hint – look in chapter 10)

I can: describe what happens during Sea Floor Spreading DO NOW: What is a Mid- ocean Ridge?

Chapter 2: Plate Tectonics Lesson 1 Objective #3.

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

Earth’s Structure and Pangaea. Review Inside the Earth The Earth has 4 main layers. 1.Crust (rock) 2.Mantle (rock) 3.Outer Core (metal) 4.Inner Core (

The oceans are widening along the mid-ocean ridges.

DEVELOPMENT OF A THEORY Page 47 of INB. ESSENTIAL QUESTION  Explain the evidence used to support seafloor spreading.

SEA-FLOOR SPREADING. Sea-Floor Spreading Mapping the Mid-Ocean Ridge The mid-ocean ridge is the longest chain of mountains in the world. The mid-ocean.

Continental Drift. Continental Drift Theory Most other scientists did not feel Wegener’s theory was true. That was because Wegener couldn’t come up with.

“Restless Continents”. A. One scientist who looked at the pieces of this puzzle was Alfred Wegener. 1. In the early 1900s, he wrote about his hypothesis.

Proving Wegener. Mid Ocean Ridge The Mid-Atlantic Ridge is part of under-seas Mountain Range known as Mid-Ocean Ridge The rocks found on Continents are.

Earth’s Structure and Pangaea. Review Inside the Earth The Earth has 4 main layers. 1.Crust (rock) 2.Mantle (rock) 3.Outer Core (metal) 4.Inner Core (

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.

Sea Floor Spreading The Mid-ocean Ridge Vocabulary Sonar Sea-floor spreading Deep-ocean trench Subduction Mid-ocean ridge.

Seafloor Spreading What evidence do scientists have to support the fact that the Earth’s crust is continuously moving?

DEVELOPMENT OF A THEORY Chapter 14 Lesson 2. Mapping of the Ocean Floor WWII played an important role in mapping of the ocean floor- Why? They were able.

Plate Tectonics. Outline  Pangaea  Continental Drift  Mid-ocean ridges and seafloor spreading  Magnetic patterns on the seafloor  Plate tectonics:

Continental Drift Notes

The Theory of Continental Drift Observations Leading To and Evidences Supporting Theory.

Development of Plate Tectonic Theory In the late 1940’s scientists discover that the ocean floor is not flat but contains vast mountain ranges that are.

Seafloor Spreading (still continuing ch. 4.1).  Underwater mountain range called the Mid-Atlantic Ridge discovered in  Part of an 80,000-km-long.

 Alfred Wegener wrote about his hypothesis of continental drift in the 1900s.  Continental drift is the hypothesis that states that the continents.

The Theory of Plate Tectonics and Continental Drift Write down the underlined items for your notes. Feel free to put the material in your own words.

Chapter 7 Section 2. What You Will Learn  Describe Wegener’s hypothesis of continental drift.  Explain how sea-floor spreading provides a way for continents.

Earth’s Structure and Pangaea. Review Inside the Earth The Earth has 3 layers. 1.Crust 2.Mantle 3.Core.

Chapter 10 Plate Tectonics. 1. Continental Drift the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to.

Earth’s Structure and Pangaea. Review Inside the Earth The Earth has 4 main layers. 1.Crust (rock) 2.Mantle (rock) 3.Outer Core (liquid metal) 4.Inner.

PLATE TECTONICS.

The Theory of Plate Tectonics

Continental Drift and Sea Floor Spreading

Restless Continents Chapter 4: Lesson 2 Page95-98.

Sea-Floor Spreading.

12.1 Evidence for Continental Drift

9.2: Sea-Floor Spreading in the early 1900s, scientists using sonar (SOund Navigation And Ranging) discovered deep-ocean trenches deep-ocean trenches:

Student Presentations Ch. 14 Lesson 2

12.1 Evidence for Continental Drift

12.1 Evidence for Continental Drift

12.1 Evidence for Continental Drift

Evidence found and Wegener Redeemed

Friday, 1/9/2015 The evidence that reignited the continental drift theory was _____________________. Sea floor spreading occurs where 2 plate boundaries.

The mechanism for continental drift

Sea-Floor Spreading.

Part 2 of # 8 Continental Drift and Plate Tectonic Notes

Sea-Floor Spreading And the Mid Ocean Ridge.

Earth’s Structure and Pangaea

The oceans are widening along the mid-ocean ridges.

Developing the Theory of Plate Tectonics!

Sea Floor Spreading.

Development of a Theory

Presentation transcript:

Sea Floor Spreading

rMagnet.swf

What is Sea Floor Spreading? Around the planet, there are ridges (under water mountain ranges) where new sea floor is being produced – Example: the Mid Atlantic Ridge At these locations, magma is rising and cooling into new oceanic crust As new crust is created, it forces the continental crust apart.

Evidence of SFS 1. Rock that makes up the ocean floor gets older as you move away from the mid-ocean ridge.

2.There is evidence of “new” rock (sea floor) along the mid-ocean ridge. – There is example of pillow lava on the ocean floor.

3. There are magnetic stripes in the rock that make up the ocean floor. – As lava cools, the iron in the lava aligns with the magnetic field. – This rock indicates the Earth’s magnetic field has reversed itself. – The pattern or reversal is the same on both sides of the mid-ocean ridge.

orMagnet.swf orMagnet.swf Lesson1/Geo01-14.swf Lesson1/Geo01-14.swf

Free Write Explain the theory of continental drift stating at least three different pieces of evidence.

Enrichment Group A – (Back of the room) Peer grade responses. Once completed design your own supercontinent 250 million in the future. Group B – (Front of the room) Compare paper with peer. Then, utilizing resources, find evidence to support your answer. Group C – (With teacher)

/flash/2_6.swf /flash/2_6.swf ts/simulations/SEPUP_Plate_simulation.swf ts/simulations/SEPUP_Plate_simulation.swf