Download earth`s interior 2015

Earth’s Interior
Crust
 The outermost layer of solid rock including
dry land and the ocean floor.
Mantel
 Made up of rock that is very hot, but solid.
(3,000 kilometers thick).
 Soft rock that can flow like liquid.
Outer Core
 Liquid layer that surrounds the inner core.
 Iron and Nickel.
Inner Core
 Dense, solid iron and nickel.
Changes within Earth
 The deeper beneath Earth’s surface…
 Temperature increases.
 Pressure increases.
 Density increases.
Earthquakes
 An earthquake is ground shaking that occur when
blocks of rock in Earth move suddenly and release
energy.
 Earthquakes occur along fault lines and release
seismic waves.
Seismic Waves
 During an Earthquake, energy is released in the form
of seismic waves.
 Scientists can observe these waves by looking at a
seismograph.
 https://www.youtube.com/watch?v=Gbd1FcuLJLQ
Properties of Seismic Waves
 Seismic Reflection
 Seismic waves bounce off certain layers of rock.
 A seismograph measures how long it takes waves to bounce off
a layer and return.
 Seismic Refraction
 Seismic waves bend when they reach a part of Earth that has a
different density.
 The velocity (speed) of the wave increases when it enters a
denser layer.
Seismic Data Interpreted
 1) Three main layers of Earth.
 2) Oceanic crust is denser than continental crust.
 3) The boundary between the crust and mantel is
called the Moho.
 4) The middle of the mantel is partially liquid.
 5) The outer core is liquid.