The Layers of the Earth

The Layers of the Earth
This picture shows all the layers of the earth, from the inner core to the crust.

Plate Tectonics

Plate Tectonics
This is a picture of plate tectonics fitting together just like a jig-saw puzzle

Tuesday, April 7, 2009

Mid-Ocean Ridge

What are Mid-Ocean Ridges? 
Mid-Ocean ridges are like long chains of mountains underwater. It is also the longest mountain range in the whole water, of course underwater. It is more 56,000 kilometers (35,000) miles long. This series of mountains and valleys marks where the Earth's crustal plates are moving apart.

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The Pangea

Pangea was one super continent that was on the earth 200,000,000 years ago. The word Pangea means 'all land' in Greek. The pieces that made up this super continent split up and drifted slowly apart, and became the seven continents today.

Scientists say that they knew there was Pangea because there were the same matching fossils that were found in Africa and South America. Also, all the continents would fit almost perfectly together like a jig-saw puzzle.

Plate Tectonics

Plate Tectonics
This is a picture of all the different plates on Earth