Inside Earth By Lisa Shekhter

Introduction Earthquakes are movements or vibrations in earth They are caused by the real ease of stored energy in Earth's outer layer This realse of energy causes sudden shift of rock as well as other kinds of changes Scientists feel and listen to earth by using instruments called seismograph A seismograph detects, measures, and records the energy of earthquakes vibration Pressure within earth can cause rocks in its outer layer to brake move,the brake is called a fault.

Primary Waves Called P waves Fastest waves First to arrive at a distance point Travels through solids, liquids, gases

Secondary Waves Called S waves Slower than P waves Arrive later at a distance point Travel through solids only

Surface Waves Also called L waves Slowest waves of all Felt at the surface cause the most damage

Crust Solid rock that makes up Earth's outer layer. It's deeper under continents than under oceans.

Mantle Layer of rock lying below the crust Rocks in the region can move or slowly move or slowly flow because of great pressure and high temperatures

Outer core Liquid layer below the mantle It is made out of melted iron

Inner core A sphere of solid materials at Earth's center

GUESS THAT PICTURE ?

Fault

Tectonic plates

Seismograph

Earthquake