Sea Floor Spreading Inside Earth Ch. 1.4

Slides:

Advertisements

Similar presentations

Sea-Floor Spreading.

Advertisements

Sea Floor Spreading and Continental Drift

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.

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.

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.

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.

SEA-FLOOR SPREADING TXT: PG. 97 CHAPTER 3, SECTION 4.

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

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.

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.

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

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. Who developed the theory of continental drift? A)Wegener B)Einstein C)Beethoven D)Alexander Graham Bell.

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.

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

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

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.

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.

Inside Earth: Chapter 1- Plate Tectonics Section 4: Sea-Floor Spreading.

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 CH 4 Prentice Hall p CH 4 Prentice Hall p Spreading.

Sea-Floor Spreading.

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

Sea-Floor Spreading. What Are Mid-Ocean Ridges? In certain places, the floor of the ocean appeared to be stitched together like the seams of a baseball!

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

Sea-Floor Spreading.

Continental Drift Notes

Continental Drift Theory Proposed by Alfred Wegener in million years ago, all of the continents were combined into one super-continent called.

Chapter One: Plate Tectonics Section 4: Sea-Floor Spreading Pages

Sea-Floor Spreading.

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

Sea Floor Spreading The Mid-ocean Ridge.

Section Sea Floor Spreading Reading Notes 1

Sea-Floor Spreading Pages

Review from yesterday!.

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.

Sea-Floor Spreading.

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

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?

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?

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 4-4 Notes.

Sea-Floor Spreading.

Presentation transcript:

Sea Floor Spreading Inside Earth Ch. 1.4 Sea Floor Spreading Song = http://www.youtube.com/watch?v=wW23Z94yf24

Introduction A. Deep in the ocean the temp is near _freezing_(0C) B. Many things live in the deep ocean. 1. Giant __tubeworms_ and clams 2. Provide evidence for Wegener’s hypothesis of __Continental Drift__. 500 × 340 - nsf.gov Brain Pop = Ocean Floor

I. Mid Ocean Ridges A. Sonar = device that bounces sound waves off underwater objects and records them B. Mid-ocean ridges are _mountain chains underwater and the island of Iceland. C. Mapping the ridges makes scientists want to know more about them.

1181 × 1181 - marinesciencetoday.com

II. What is Sea Floor Spreading A. _Harry Hess_ an American geologist studied mid- ocean ridges. B. His idea was of sea-floor spreading that continually adds new __material___ to the __ocean floor. Sea Floor Spreading (Nye clip) = http://www.youtube.com/watch?v=6CsTTmvX6mc

Sea Floor C. Sea floor spreads apart along both sides of mid-ocean ridge as __new crust is added. D. As the ocean floor moves, the _continents_ move too. E. _Older_ rock gets pushed further out from the ridge.

Sea Floor

III. Evidence from Sea Floor Spreading A. Molten Material 1. A submarine, Alvin went to the ocean floor to find evidence of sea-__floor__ _spreading__. Molten material is erupting from the mantle and hardens quickly when it hits the cold ocean water. Brain Pop = Submarine

Evidence B. Magnetic stripes 1. Scientists found that the rock makes up the ocean floor lies in patterns of _magnetized__ “stripes”. 2.These stripes hold a record of __reversal___ in Earth’s magnetic field. Magnetic Field Reversal = http://www.ck12.org/earth-science/Magnetic-Evidence-for-Seafloor-Spreading/lecture/Magnetic-Field-Reversal/

Evidence C. Drilling samples 1. Drilling into oceanic rock has given us the _ages_ of the rock. 2. Scientists determined that the _youngest__ rocks were __closest__ to the center of the mid-ocean ridges and the older rocks were farther away from the ridges.

IV. Subduction at the Trenches A. deep ocean trenches = underwater canyon B. Subduction = ocean floor moves back into the mantle through deep ocean trenches

Subduction C. Subduction and Earth’s oceans 1. Pacific Ocean is __Shrinking__; 2. Atlantic Ocean is _Expanding___.