Other Notes on Earth’s Changing Surface Write on the RIGHT side Things you should know for the test!!!!

Slow vs Rapid changes Some changes to Earth’s surface occur quickly or rapidly. An example of a rapid change is an earthquake. Some changes occur over long periods of time (slow changes). Examples of slow changes are mountain building, sea-floor spreading, and the formation of trenches

Other Notes (For the Test) Heat from the core creates convection currents in the mantle. Two opposing magma convection cells can pull one tectonic plate below another. Earth’s source of energy that moves the tectonic plates is the Earth’s molten layers. Earthquakes occur most commonly along cracks or boundaries in Earth’s crust.

Review Questions What is the theory of plate tectonics and what is some evidence to support it? What is the following a picture of (be specific)? What type of heat transfer takes place in the mantle? Why does the Earth’s rigid crust float on top of the mantle? Which portion of the Earth contains plates, which move to form mountains and volcanoes? Do mid ocean ridges form when plates move towards or away from each other?