final comic strip due friday!!!!!!!!! -must submit all 3 drafts along with peer/teacher feedback

FINAL COMIC STRIP DUE FRIDAY!!!!!!!!!

-Must submit all 3 drafts along with peer/teacher feedback

WHAT IS THIS? THIS IS NOT HOW EARTH LOOKS TODAY

Plate Tectonics

The theory of plate tectonics was first proposed byAlfred Wegener in 1910. Wegener noticed that theshorelines of the continents seemed to ‘fit together’like the pieces of a giant jig saw puzzle.

Wegener’s theory stated:1) The continents were once all

together in oneplace forming a supercontinent, Pangea.

2) The continents broke apart and drifted to theirpresent locations.

Today plate tectonics and continental drift are accepted as facts.Why? Let’s see the evidence!

The box represents a conveyor belt. The drawings represent packages. Which person are the packages moving toward?

How do you know?

Packages are moving toward Joe, b/c the arrows on the top where the packages are placed on are moving toward Joe.

L.T: I can explain why the Earths crust changes

Joe Kara

Convection current:

Hot water rises because it’s lighter. When it reaches the top then it cools and sinks because it gets heavier.

Next >

Convection currents within the Earth’s mantle cause the plates floating on it to move. This movement takes millions of years.

Mantle

Plates

What Causes Plate Motion?

Similar to groceries on a conveyor

belt or a raft floating on a river.

Plates (tectonic plates): sections of the Earths crust which are constantly moving at a very slow speed.

This movement causes earthquakes, volcanoes, and the continents and oceans to move

Introduction

Next >

Plate tectonics: the movement of the crust/lithosphere because of movement in the mantle. (convection currents)

The Earth’s crust is always moving!

Pangea = Supercontinent (millions of years ago)

Pangea

WHAT IS THIS? THIS IS NOT HOW EARTH LOOKS TODAY

Plate Tectonics

The theory of plate tectonics was first proposed byAlfred Wegener in 1910. Wegener noticed that theshorelines of the continents seemed to ‘fit together’like the pieces of a giant jig saw puzzle.

Wegener’s theory stated:1) The continents were once all

together in oneplace forming a supercontinent, Pangea.

2) The continents broke apart and drifted to theirpresent locations.

Continental Drift: The gradual Continental Drift: The gradual movement of the continents across movement of the continents across the earth.the earth.

Copyright © 2010 Ryan P. Murphy

• The speed at which the plates move is about the speed at which your fingernails grow.


• In 1915, The German geologist Alfred Wegener (1880-1930) proposed continental drift.


• In 1915, The German geologist Alfred Wegener (1880-1930) proposed continental drift. Not accepted until the 1950’s!


• In 1915, The German geologist Alfred Wegener (1880-1930) proposed continental drift. Not accepted until 1950’s!


“I say.” “Africa and South America fit strangely like

two puzzle pieces.”

The shapes match.The shapes match.


FOSSILS!FOSSILS!

The remains or impression of a The remains or impression of a prehistoric organism (living thing: prehistoric organism (living thing: plant, animal, footprint) plant, animal, footprint)

Same fossils found on different Same fossils found on different continentscontinents


The Same rock structures on different The Same rock structures on different continentscontinents


• What is this a fossil of?– Where would you expect to find a specimen

like this on the planet?


• Answer! This is a fossilized tropical plant found on Antarctica.


• Answer! This is a fossilized tropical plant found on Antarctica.– Remember, the continents have moved and

Antarctica use to be in a warmer climate.


• Answer! This is a fossilized tropical plant found on Antarctica.– Remember, the continents have moved and

Antarctica use to be in a warmer climate.


“Darn you continental Drift.”

“Darn you.”

Fossils of plants and animals in Fossils of plants and animals in AntarcticaAntarctica


CREATING PANGEA

• Today you will be recreating Pangea using the fossil evidence.

• With your group cut out the tectonic plates on your map and lay them on a piece of construction paper.

• Use the fossil evidence to help you line up the plates.

• Write your group members name on the construction paper.

• Current Day + or – 4mm

http://antwrp.gsfc.nasa.gov/apod/image/0010/PangeaUltima_scotese_big.jpg

• What causes continental drift and plate tectonics?


• Answer! – Convection currents (Remember heat rises)

move the plates


• Which colored arrows are incorrect based on the convection current patterns and plate movements below?


• Answer! The blue arrows. The plates should be moving toward each other.


“Oh-no!” “We are trying it

again.”

• Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below?


• Answer! The purple arrows should be diverging instead of converging.


“Oh-no!” “We are trying it one

more time.”

• Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below?


• Answer! The light blue arrows should be diverging instead of converging.


“Oh-no!” “We are trying it one

more time.”

• Try Again! Which colored arrows are the only correct on in the entire group.


Let's sum up everything we've learned:1) The earth's crust is divided into many pieces called tectonic plates which move around over long periods of time.2) Evidence for crustal movement includes:

a) The 'fit' of the continents.b) Correlation of rock types from opposite shores.

c) Correlation of fossils from opposite shores.d) Age of the sea floor (youngest near mid-ocean ridges and oldest near the continents).e) Paleomagnetism: zones of oppositely magnetized rock on opposite sides of the mid ocean ridge.f) Direct satellite and GPS measurement of continental movement.

3) The force driving the plates are convection currents (density differences) in the earth's mantle.

http://home.earthlink.net/~room6b/6bIndex.htm

final comic strip due friday!!!!!!!!! -must submit all 3 drafts along with peer/teacher feedback

Documents

murphy slide

pangea slide

peerteacher feedback

theory of plate tectonics

proposed continental

gradual movement

plate motion

mantle plates