Continental Drift. Note the Shapes South America & Africa: They Match! What about any others? North America?

Slides:



Advertisements
Similar presentations
Theory that all of the continents were once one large landmass (Pangaea) that has broken up and drifted apart. –Alfred Wegener Evidence –Continents fit.
Advertisements

WARM-UPS #1 Use your p to answer the questions. Use your p to answer the questions. 1. What type of boundary occurs where plates collide?
Plate Movements The Basics. Continental Drift Theory  Alfred Wegener (1910s)  stated that some 250m yrs ago a single giant continent called “Pangaea”
Restless Continents.
EVIDENCE OF CONTINENTAL DRIFT.
Plate Tectonics Section 1 Section 1: Continental Drift Preview Key Ideas Wegener’s Hypothesis Sea-Floor Spreading Paleomagnetism Wegener Redeemed Continental.
Unit 4 Lesson 2 Plate Tectonics
Chapter 10: Plate Tectonics
The Dynamic Earth and Plate Tectonics. Early Ideas on a moving Earth Alfred Wegener proposed idea: “Continental Drift” – Stated that all continents used.
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-
Continental Drift. The continents are moving At one time all the continents were connected Pangaea.
Continental Drift. What is continental drift? 1912 Alfred Wegener Hypothesized that- the continents are moving = Continental drift all continents once.
Topic: Continental Drift Essential Question: What evidence supports the theory of continental drift?
AIM: What evidence do we have for the Theory of Plate Tectonics?
Unit 4 Lesson 2 Plate Tectonics Copyright © Houghton Mifflin Harcourt Publishing Company.
Continental Drift 225 million years ago. Continental Drift million years ago.
Chapter 4: Plate tectonics The evidence for the theory of plate tectonics has been accumulating for 400 years. It is only since the 1960’s that this theory.
WARM-UP # 52 What is ONE piece of evidence that the continents were once all joined together? You know two – fit together like a puzzle and matching fossil.
Continental Drift The Beginning of Plate Tectonics.
Plates of the Lithosphere. Pangaea – Giant supercontinent of the Paleozoic and Mesozoic eras Continental Drift – The breakup of Pangaea where plates moved.
Chapter 7 Section 2 Pages Continental Drift.
The Theory of Continental Drift Continental drift was proposed by Alfred Wegener He used the following ideas to support his theory: 1. The fit of the.
Target What is continental drift?. Continental Drift The theory that continents can drift apart from one another and has done so in the past.
Chapter 11 Plate Tectonics. Continental Drift Continental Drift – a hypothesis proposed by Alfred Wegener, which states that continents have moved horizontally.
Forces behind change Plate tectonics. Focus Questions How does the movement of the earth’s plates cause land features? What evidence supports the theory.
Plate Tectonics ESPS 2015 Hagen.
Evidence for Continental Drift Wegener (1915) proposed Pangaea – one large continent existed 200 million years ago Wegener (1915) proposed Pangaea – one.
Evidence for Plate Tectonics
Continental Drift, Plate Tectonics, and Seafloor Spreading Physical Geography 110.
Plate Tectonics Unit:. Composition of the Earth: Layers of the Earth: 1.Crust: 5-100km thick. a.Oceanic crust: thin and more dense, mostly basalt b.Continental.
“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.
Warm-Up 1.If a bone specimen contains 12.5% of its original amount of Carbon-14, how many half lives have passed? 2.How old if the bone? Time’s Up!
Africa The Red Sea between Africa and the Arabian peninsula in Asia marks a region where two pieces of the lithosphere are slowly moving apart. Over the.
Plate Tectonics.
Bell Questions 9/14/11 1.What do scientists believe the Earth was formed from? 2.How old have scientists calculated the earth to be? 3.List three things.
The Theory of Continental Drift Observations Leading To and Evidences Supporting Theory.
HOW DOES EARTH PLATES HELP SHAPE LANDFORMS Chapter 8 Section 2.
The Theory of Continental Drift
PLATE BOUNDARIES Day 1. A. Geographic Puzzle 1. Alfred Wegener - a scientist that first believed that the continents fit together like a puzzle a) Ex:
CONTINENTAL DRIFT. HOW MANY CONTINENTS ARE THERE? 7- North America, South America, Africa, Europe, Asia, Australia, Antarctica.
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.
Section 1: Continental Drift
Earth’s Structure and Pangaea. Review Inside the Earth The Earth has 3 layers. 1.Crust 2.Mantle 3.Core.
Earth & Space Describe the historical development of evidence that supports plate tectonic theory. Evidence for plate tectonics The match in shape between.
Chapter 10 Section 1 Notes Continental Drift.
Investigation 4: Plate Tectonics
Plate Tectonics Continental Drift.
Bellringer 10/31/16 Make a Cornell notes data sheet.
Chapter 10 Section 1 Notes Continental Drift.
Chapter 10 Section 1 Notes Continental Drift.
Section 1: Continental Drift
Study Notes Standard 2 Objective 2
Chapter 10: Plate Tectonics
Continental Drift and Sea Floor Spreading
GEOLOGY Notes PART 1 Alfred Wegener (1912)
Bellwork Box #7 Read page 248:
Continental Drift and Seafloor Spreading Notes
Drifting Continents Did Pangea Exist?.
Drifting Continents Did Pangea Exist?.
CHAPTER 2 Plate Tectonics and the Ocean Floor
Continental Drift Theory
The Dynamic Earth.
Drifting Continents Did Pangea Exist?.
The Earth’s Internal Processes: Continental Drift Theory
Drifting Continents.
Continental Drift Theory
Journal #62 After putting the continental pieces together on Friday, what did you notice about the continents? What did you notice about the fossils?
Presentation transcript:

Continental Drift

Note the Shapes South America & Africa: They Match! What about any others? North America?

Continental Drift: The Idea that the continents move around and change locations on Earth. Alfred Wegener proposed the idea of Continental Drift The globe before and after continental separation By Antonio Snider-Pellegrini, 1858 (pre-Wegener)

“Continental Drift” Evidence: Fossils

Animal and plant fossils are located on continents that a currently do not touch These continents must have touched at some time for matching fossils to be found in the in the areas shown on the continents

“Continental Drift” Evidence: Glacial Markings Marks where glaciers used to scrape along the surface are found on continents that must have once touched Some of these continents are in areas currently too warm to support glacier devlopment These continents must once have been in colder regions

“Continental Drift” Evidence: Glacial Markings

“Continental Drift” Evidence: Mountain Belts Mountain belts and rock types connect across continents Some matching mountain belts and rock types are found on continents that no longer touch These continents must have touched at some time

“Continental Drift” Evidence: Mountain Belts

Moving Continents…Back in time…

Pangaea 250 million years ago, the continents fit together like a jigsaw puzzle!

● The Continents Move Around on Earth ● Evidence for Continental Drift: Shape of the Continents Fossils Glacial Markings Mountain Belts ● Pangaea existed when all the continents were together Conclusions

Part 1: The Creation of New Oceanic Crust Seafloor Spreading

Oceanic plates move apart at mid-ocean ridges. Magma moves into the rift. The magma cools and becomes new ocean floor. The new material magnetizes based on the Earth’s magnetic field at the time. The new material moves away from the ridge. More magma moves into the rift and the cycle continues

Age and Magnetic Field recorded in the seafloor and spread to each side of the ridge Each side of the ridge is the same!!

Determining Seafloor Age

● Continents > 4 Billion Years Old ● Seafloor < 200 Million Years Old AGE continent ocean Seafloor Age

AGE Age distribution The colors represent different ages The youngest crust is nearest the ridge The pattern is symmetric The pattern is more obvious in the Atlantic ocean, where spreading has been very even

● The ocean is much younger than the continents. Continents: 4 Billion years Oceans: <200 Million years ● Seafloor ages make a mirror image (symmetric) pattern. Conclusions

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.