TECTONIC-EARTH

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TECTONIC EARTH

   The outside layer of Earth is broken up into giant pieces called tectonic plates. Over millions of years these plates move, bump together,overlap, and slide past each other, in the process making new areas of ocean floor, building mountains, causing earthquakes, and creating volcanoes.

Shifting plates

   Earth’s surface appears to be still, but it is actually a collection of plates that is always moving. These plates move around due to currents deep inside the Earth. Plates that are under oceans are much thinner and less dense than thous under continents- where they push into each other the oceanic plate gets forced down underneath the continental plate.

Jigsaw planet

  Tectonic plates fit together to make up Earth’s surface. They move constantly and can change our planet’s features depending on how they meet. Where they push tog

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ether. Mountain and volcanoes form. Where they pull apart, new ocean floor is created.Tectonic plate boundaries -Plate boundaries are classified depending on wether plate are moving together (converging.) apart (diverging), or past each other (transform).

How plate move

   No one knows exactly why tectonic plates move, but scientists think it is likely that they shift around on the topm of currents in the layer underneath. These currents are thought to move in steady loops- rising when an area is heated by processes at the the centre of of earth, then sinking down again when they are cooled by moving nearer to the surface.Moving mantle -Though mostly solid, the mantle moves. As currents rise, cool, and sink, they drag the plate around on top of them.