Structure of the Earth & Plate Tectonics. Our Changing Earth The surface of the earth is always changing. What are the two ways in which landform change.

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Presentation transcript:

Structure of the Earth & Plate Tectonics

Our Changing Earth The surface of the earth is always changing. What are the two ways in which landform change on the surface? Weathering Erosion The landform also change due to the movement of the plates.

Internal Structure of the Earth The internal structures of the earth are Inner core Outer core Mantle Crust

Which structure of the earth do we live on? Crust The crust is made of pieces called plates, and it is not hot.

Crust The crust has cracks, and these cracks are known as faults.

Crust Each separate part of the crust is called a plate – a tectonic plate.

Mantle These plates float on a layer of liquid rock called the mantle. The plates move around slowly on top of the mantle.

Inner and Outer Core The center of the earth is a metal core and it is broken into two parts, the inner and the outer core.

Depth and Temperature Structure of the Earth DepthTemperature Mantle2900 Km870°C Outer core5150 Km °C Inner core6400 Km7000°C

Plate Tectonics Earth’s crust are broken into enormous slabs called tectonic plates. About 200 million years ago, a giant landmass existed called pangaea.

Pangea Movement mations/47.swf terc/content/visualizations/es0806/es0806pag e01.cfm?chapter_no=visualization

Plate tectonics Slow movement of liquid rock in the mantle causes the tectonic plates to move. tion.htm

Plate Tectonics

Tectonic Plates and Earth’s Active volcanoes

Where are most of the volcanoes located?

What is a Volcano? Volcano is an opening or a vent in the surface of the earth through which magma and gases escape. Magma is molten rock located beneath the surface of the earth.

Volcano Erupting

Earthquakes terc/content/visualizations/es1002/es1002pag e01.cfm?chapter_no=visualization s/earthquakes/index.html

Earthquakes What causes earthquake? When plates rub together along their faults lines (the places where they meet). Most earthquakes begin deep within the Earth’s surface stm

Earthquakes The amount of energy released by an earthquake is called its magnitude. When an earthquake occurs at the sea floor, it is called tsunami. pacific/ stm

Resources tonics.html Tectonics/move.html s-and-convection-currents.html ge1/current/lectures/evolving_earth/evolving_ earth.html

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