2. What is an earthquake? Review: Sections of the Earth’s crust (plates) move and cause rocks to bend and stretch If there is enough force the rocks will break, release energy and cause vibrations = earthquake
3. Where are these plates found? These plates are made of Earth’s crust Review layers of the Earth: animation Crust Mantle Outer core Inner core
4. What is an earthquake? Earth’s crust is in constant motion because of forces inside the earth These cause sections of the crust (plates) to move which puts force on the plates 3 types of force: Compression Tension Shear
5. Forces form faults Compression = force that pushes together Tension = force that pulls apart Shear = force that moves past the other ↑↓ These forces cause rocks to break and move along surfaces called faults
6. Different Forces produce Different Faults To see the above in motion: When rocks are stretched they may break and an earthquake will result When they break, energy is released along fault surfaces, also called an earthquake!
