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Central Idea: The Earth is in a state of flux

What is the Earth made of?
What are the forces that can change it?
How has the Earth changed and is continuing to change?
Why does the Earth change?

"Despite our tendency to consider Earth as static, it is actually a dynamic and ever-changing planet. Wind, water, and ice erode and shape the land. Volcanic activity and earthquakes alter the landscape in a dramatic and often violent manner. And on a much longer timescale, the movement of earth's plates slowly reconfigures oceans and continents." (Jessica Fries-Gaither)

Processes in the lithosphere, atmosphere, hydrosphere, and biosphere interact to shape Earth.( link)
  • Internal forces within Earth move its landmasses and create new sea floor features.
  • Different forces on the surface of Earth change its outermost features.


What does a geologist do? Listen to Sarika Cullis-Suzuki and Nick Eyles discuss volcanoes, moving continents, and how our oceans emerged from red hot magma by clicking on this link:

Our Netvibes page for the Changing Earth