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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
EARTHQUAKESEARTHQUAKES
EARTHQUAKESEARTHQUAKES
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.
KEY CONCEPTSKEY CONCEPTS
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.
KEY CONCEPTSKEY CONCEPTS
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.
HISTORY OF EARTHHISTORY OF EARTH
The oldest rocks The oldest rocks known are formed known are formed 4 billion years 4 billion years ago.ago.
HISTORY OF EARTHHISTORY OF EARTH
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.
HISTORY OF EARTHHISTORY OF EARTH
Atlantic Ocean Atlantic Ocean starts opening; starts opening; Appalachian Appalachian Mountains begin Mountains begin to form.to form.
HISTORY OF EARTHHISTORY OF EARTH
Dinosaurs die Dinosaurs die out 65 million out 65 million years ago.years ago.
HISTORY OF EARTHHISTORY OF EARTH
Himalayan Himalayan Mountains begin Mountains begin forming 45 forming 45 million years million years ago.ago.
HISTORY OF EARTHHISTORY OF EARTH
The Hawaiian The Hawaiian Islands begin Islands begin forming 5 million forming 5 million years ago.years ago.
HISTORY OF EARTHHISTORY OF EARTH
The Great Ice The Great Ice Age begins 1.6 Age begins 1.6 million years million years ago.ago.
HISTORY OF EARTHHISTORY OF EARTH
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