EARTH Third Rock From The Sun. BIG IDEA Earth has 3 layers. Under the surface, rock is hot enough to become soft. When soft rock rises toward the surface,

EARTHEARTH

Third Rock FromThird Rock From

The SunThe Sun

BIG IDEABIG IDEA Earth has 3 layers. Under the Earth has 3 layers. Under the

surface, rock is hot enough to surface, rock is hot enough to become soft. When soft rock rises become soft. When soft rock rises toward the surface, it can move the toward the surface, it can move the plates that make up the Earth’s plates that make up the Earth’s outermost layer. When plates move, outermost layer. When plates move, continents and oceans move, and continents and oceans move, and earthquakes and volcanoes can form.earthquakes and volcanoes can form.

EARTH’S 3 MAIN LAYERSEARTH’S 3 MAIN LAYERS

MOVING TECTONIC PLATESMOVING TECTONIC PLATES

EARTHQUAKESEARTHQUAKES




VOLCANOESVOLCANOES

VOLCANOESVOLCANOES

VOLCANOESVOLCANOES

VOLCANOESVOLCANOES

VOLCANOESVOLCANOES

KEY CONCEPTSKEY CONCEPTS

CrustCrust- The outer - The outer layer of Earth layer of Earth that is made that is made from several from several large pieces large pieces called called tectonic tectonic plates.plates.


MantleMantle- The - The middle layer of middle layer of Earth. It is warm Earth. It is warm and about 60 and about 60 miles below the miles below the crust.crust.


CoreCore- The center - The center layer of Earth. It layer of Earth. It is is very very hot!hot!

HISTORY OF EARTHHISTORY OF EARTH

Earth forms ap-Earth forms ap-proximately 4.6 proximately 4.6 billion years ago billion years ago in what has come in what has come to be known as to be known as the “big bang” the “big bang” theory.theory.


The oldest rocks The oldest rocks known are formed known are formed 4 billion years 4 billion years ago.ago.


First evidence of First evidence of living organisms living organisms appears in rocks appears in rocks (fossils.) 600 (fossils.) 600 million years million years ago.ago.


Atlantic Ocean Atlantic Ocean starts opening; starts opening; Appalachian Appalachian Mountains begin Mountains begin to form.to form.


Dinosaurs die Dinosaurs die out 65 million out 65 million years ago.years ago.


Himalayan Himalayan Mountains begin Mountains begin forming 45 forming 45 million years million years ago.ago.


The Hawaiian The Hawaiian Islands begin Islands begin forming 5 million forming 5 million years ago.years ago.


The Great Ice The Great Ice Age begins 1.6 Age begins 1.6 million years million years ago.ago.


The Great Lakes The Great Lakes form 8,000 years form 8,000 years ago.ago.

PLATE TECTONICSPLATE TECTONICS

Plate Plate TectonicsTectonics- - The science of The science of how Earth’s how Earth’s crust plates crust plates move and their move and their effect on the effect on the planet.planet.

EvidenceMany volcanoes arefound on the edges

of continents.

EvidenceSome continents look

like they couldfit together.

EvidenceMost Earthquakes occur

in certain placeson Earth’ssurface.

TheTheory of

Plate Tectonics

PLATE TECTONICSPLATE TECTONICS

RING OF FIRERING OF FIRE

RING OF FIRERING OF FIRE

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EARTH Third Rock From The Sun. BIG IDEA Earth has 3 layers. Under the surface, rock is hot enough to become soft. When soft rock rises toward the surface,