AIM: Explain the process and the evidence for sea-floor spreading ? OBJ: Given notes and activity sheet SWBAT explain the process and the evidence for.

Slides:

Advertisements

Similar presentations

Sea-Floor Spreading.

Advertisements

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

Sea Floor Spreading and Plate Tectonics

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

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-

Chapter 17 Plate Tectonics

Sea-Floor Spreading Chapter 3 Lesson 4

Check your notes for key ideas!

Sea Floor Spreading So… now that we know that about 250 million years ago there was one big super continent called Pangaea. What caused it to move apart?

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.

What evidence do we have that over time continents have moved?

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

Section 4 Sea-Floor Spreading

Sea Floor Spreading Chapter 4 Section 4 Standard S 6.1 Students know evidence from plate tectonics is derived from the fit of the continents and mid.

Sea-Floor Spreading Key Concepts

FQ: How could continents move apart? 1. Think, pair, share 2. Write your ideas in your scientist notebook.

Plate Tectonics. Theory of Plate Tectonics Meaning – “plate structure” Developed – 1960’s Explains the movement of Earth’s plates, causes of volcanoes,

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

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

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.

Sea-Floor Spreading.

The Theory of Seafloor Spreading. Seafloor Bathymetry Creating Maps of the Ocean Floor Scientists were able to map the ocean floor using sonar, an Echo-

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

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.

Mid-Ocean Ridge Is an undersea mountain chain that is part of a long system of mountains that winds beneath Earth’s oceans.

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?

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

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.

Bellringer What three specific types of evidence did Wegener study that led to him creating the idea that the continents had moved?

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. 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.

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.

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 (

Lesson 6 Date: 1/19 LT: I can describe the processes that change Earth’s surface. Sponge: Where are earthquakes most likely to occur?

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?

Sea-Floor Spreading. Learning Target I will explain the evidence for and process of sea-floor spreading.

Sea-Floor Spreading.

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

Sea-floor Spreading and Changing Earth’s Surface.

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.

Sea-Floor Spreading /phsciexp/internet_activity/cfd- 1014_midocean.html.

Section Sea Floor Spreading Reading Notes 1

Sea-Floor Spreading.

Warm-Up January 21 Write What You Know!

Review from yesterday!.

Sea Floor Spreading Chapter 4.4.

Sea-Floor Spreading.

Sea-Floor Spreading.

Sea-Floor Spreading.

Evidence found and Wegener Redeemed

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?

Sea-Floor Spreading.

Sea-Floor Spreading.

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.

Presentation transcript:

AIM: Explain the process and the evidence for sea-floor spreading ? OBJ: Given notes and activity sheet SWBAT explain the process and the evidence for sea-floor spreading with 70% accuracy. DN: HW Check- Drifting Continents Activity Sheet Watch plate tectonics (clipnabber.com) ACT: Introduction to Sea-floor Spreading (definition & evidence) Subduction iPad (eSpark) HW: Text, read p.23-29, Complete Sea-Floor Spreading Activity Sheet; Work on Being A Scientist Packet, Interim, Jan 22.

Mid-Ocean Ridges (MOR) Mid Ocean Ridges: submarine mountain ranges found near the center of the world’s oceans; site of sea-floor spreading, divergent motion, and newly created oceanic basaltic crust.

Mid Ocean Ridge

Sonar Data of Mid Ocean Ridge

Iceland: Mid Ocean Ridge on land

Seafloor Spreading Seafloor Spreading: the process by which the seafloor moves apart along both sides of the mid-ocean ridge as new crust is being added. As a result, the ocean floor moves like a conveyor belt, carrying the continents along with them.

Evidence for Seafloor Spreading 1] Eruption of molten pillow lavas and smokers (videos): repeatedly occur along the mid oceanic ridge

2] M agnetic Polarity Reversals (videos): Earth’s magnetic field reversals are recorded in ocean crustal rocks and the magnetized stripe patterns are the same on both sides of the ridge.

3] Ages of the rocks: youngest at the ridge and the farther away from the ridge, the older the rocks are.

Subduction (video) Subduction: the process by which the basaltic ocean crust (heavy, dense) sinks beneath the deep oceanic trench and back into the Mantle. Trench: deep underwater canyons; site of convergent plate boundaries.