EARTH'S INTERIOR
Oceanic Crust
It is a type of waves energy produced by earthquakes and other sudden movements within Earth.
Seismic Waves
lt is the preserved remains, impression, or trace of an organism that lived in the past.
Fossils
Is a system used to organize and describe Earth's history.
Geologic Time Scale
It is consists of the crust and the rigid uppermost mantle.
Lithosphere
They are usually the first seismic waves detected by a seismograph and they are compressional or longitudinal waves
P-waves
It determines whether a rock or fossil is older or younger than another without necessarily giving an exact numerical age
Relative Dating
It is a break of light produced when a meteoroid enters Earth's atmosphere and heats up.
It is lies beneath the mantle and approximately 2,260 km thick.
Outer Core
Particle motion is generally perpendicular to the direction of wave travel.
S-Wave
It determines an approximate numerical age of a rock, fossil, or geological event
Absolute Dating
Many originate from the cold outer regions of the Solar System
Comets
It is a weak, hot, ductile region of the upper mantle beneath the lithosphere.
Asthenosphere
Why S-waves do not pass through liquids?
The outer core is liquid
It uses the predictable decay of radioactive isotopes.
Radiometric Dating
formed approximately 4.6 billion years ago from a large cloud of gas and dust called the solar nebula.
Solar System
It is composed mainly of silicate rocks rich in iron and magnesium and it is approximately 2,900 km thick.
Mantle
The behavior of this wave provides evidence that Earth has a solid crust and mantle, a liquid outer and a solid inner core.
P-Wave
It is an undisturbed sequence of sedimentary rock
Principle of Superposition
These are useful for determining the relative ages of rock layers.
Index Fossils