earth history. read the below article and hypothesize about how it would be possible for the same...
TRANSCRIPT
Read the below article and hypothesize about how it would be possible for the same dinosaur fossils to be found on different continents.http://www.telegraph.co.uk/science/dinosaurs/8967459/Fossils-of-
dicynodont-discovered-on-every-continent.html
In notebook:Title- FossilsWrite your hypothesis
Plate tectonics: the science of how the large pieces of the crust of Earth move
Continental drift: describes the drifting and sliding motion of the large pieces of Earth
Pangaea: name of a former supercontinent
Scientists think that the Earth was created about 5 billion years ago. At first, the Earth was just a ball of molten rock and gasses. As it began to cool, dense materials like iron sank down into its core. Lighter materials like compounds of oxygen and water rose toward the surface. That's why the Earth is made up of different layers -- as you can see in the cross section on the next slide.
The Earth is made up of layers. Scientists discovered this through the use of vibrations. What’s a vibration?
Hard and rigid, the crust is the outermost layer of the Earth
The crust is also the most narrow of the layers of the Earth. Measuring only an average of 20 miles deep under the continents.
The continental crust’s surface is where we breatheA lot of rock up to 25 miles deep.The oceanic crust is next doorIt’s 3-5 miles thick just below the ocean floor.
Earth’s surface: 70% H20.Where do you get all that water? Salty sea flow,fresh water’s in the glaciers, ice caps, and snow.
ChorusThrow your hands up for the layers of the earthThrow ‘em up for what’s below the surfaceThrow your hands up, and let’s discussThe inner core, outer core, mantle, and crust
Found between The Crust and The Mantle
Made up of The Crust and a little bit of The Upper Mantle
Divided into several constantly (slowly) moving plates of solid rock from which the continents and oceans are formed.
A section of The Upper Mantle on which The Lithosphere plates float
Made of a hot semiliquid material
Is divided into two regions. The Upper Mantle, and the Lower Mantle.
This layer is dense, hot and made of hot, semisolid rock.
Found directly below the crustAbout 1,800 miles thick.
ChorusThrow your hands up for the layers of the earthThrow ‘em up for what’s below the surfaceThrow your hands up, and let’s discussThe inner core, outer core, mantle, and crust
Verse IIThe mantle layer is the largest of the class.About half of our planet’s mass.The mantle is composed of very hot dense rocks,That move and flow, always on the go, they never lock,
Never stop, and they’re responsible for tectonic shiftPlease believe the Earth’s plates are adriftIt’s pretty thick and the heat is awesome1,600 at the top, 4,000 at the bottom
The core is divided into two regions. The Outer Core▪ The only liquid layer of the Earth▪ A sea of iron and nickel▪ 1,800-3,200 miles below the Earth’s surface▪ 1,400 miles thick
The Inner Core▪ Extremely Hot solid ball found in the center of
the Earth▪ 3,200-3,925 miles below the Earth’s surface▪ 750 miles in diameter
ChorusThrow your hands up for the layers of the earthThrow ‘em up for what’s below the surfaceThrow your hands up, and let’s discussThe inner core, outer core, mantle, and crust
Verse IThe layer we’ll discuss firstIs the central inner core, in the center of the earthA solid ball buried below the dirtWe believe it’s primarily metallic iron
You could never take a trip to the inner core, right?The heat will burn you up, 9,000º Fahrenheit4,000 miles below the Earth’s crustOne down three to go y’all.
1,800 miles from the tip topThe outer core is hard at work and it don’t stop.It’s busy spinning around the inner core, and listen,This steady movement causes Earth’s magnetism.
Ranging from 4 to 9,000 degrees,It contributes 1/5 of the heat flowin’ to you and me.It’s liquid metals that violently flowSo let it settle… and when you’re ready let me know. Just…
What are fossils and what do they tell us about the past?
Go through each station and take notes on the different kinds of fossils you see there. Think about what those fossils could tell a scientist.
Read the article about continental drift.
Quickly turn to your neighbor and summarize what you read.
Once you think you have a good summary, record it in your notebook.
Alfred Wegener proposed the idea of Continental Drift. He believed that all of the continents were once all together and have slowly drifted apart after Pangaea 200 million years ago.
BoundaryThe border between two tectonic plates.
Collision ZoneThe place where a collision between two continental plates crunches and folds the rocks at the boundary, lifting them up and leading to mountain formation.
FaultA crack or fracture in Earth's crust where two tectonic plates grind past each other in a horizontal direction.
RiftA dropped zone where two tectonic plates are pulling apart.
DO NOT EAT THE COOKIE!
Sliding Plate Over Asthenosphere▪ Use your cookie to demonstrate what this
looks like.
DO NOT EAT THE COOKIE!
Divergent Plate Boundary▪ Use your cookie to demonstrate what this looks
like.
DO NOT EAT THE COOKIE!
Convergent Plate Boundary▪ Use your cookie to demonstrate what this looks
like.
DO NOT EAT THE COOKIE!
Transform Plate Boundary▪ Use your cookie to demonstrate what this looks
like.
On the iPads go to this website:http://www.learner.org/interactives/dynamicearth/drift.html
Complete the worksheet as you work your way through the interactive.