The Earth

-Structure-Tectonic Plate Theory

The Earth

• The earth is made up of _____ main sections.• These are the core, the mantle and the crust.• Each section is _________ and all three

sections contribute to how the earth is ______.

The Core

• The center of the _____ is known as the core.

• The core is made of ___ segments, the molten metal (Iron) section and the _____ Iron segment.

• The heat from the core _____ into the next section of the earth, the mantle and ______ it to melt.

Liquid Outer Core

Solid Inner Core

The mantle

• The mantle mainly consists of _____, which is made of ______ minerals.

• The heat from the core causes the hot magma to ____. It cools as it magma _____ again.

• This is ______ a convection current

Mantle

The Crust

• The crust is the final layer of the earths _________ is the crust.

• It consists of separated ______.• These plates float on the ___ of the

mantle.• The plates move as the follow the

convection _______. This process takes many ______ and is called the Tectonic Theory.

Crust

The Lithosphere

• The lithosphere is the name scientists give to the layer that is made by the crust and upper mantle.

• All together, this is about 75-100KM _____ beneath continents but only about 55KM thick beneath ______.

Plate Tectonics

• This theory ________ how mountains, volcanoes, and earthquakes, are formed.

• 200 _______ years ago, there was only one big continent called _______. It _____ up to form the continents we see today.

• The continents are still ______ today.

So, once again…

• Core, both inner and outer• Mantle• Crust• Lithosphere• Plate tectonics