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Facts on the earth's crust,new dog food 2015,what to do for a dog that is vomiting and has diarrhea - Try Out

Category: Dog Trainer School | Author: admin 07.11.2014
Both the continental and the oceanic crusts are bonded to the mantle to form a layer known as the lithosphere. Answer: Scientists study the rocks that are visible on the surface of the land and the ocean.
The lower mantle is found between 670km and 2,890km below the surface, and is made from  solid rock. When the surface of the earth moves in response to heat and pressure from below, the shaking is called an earthquake. Huge sections of the crust, called tectonic plates, are always moving; some floating like huge rafts on the almost-liquid rocks below! Earthquakes can happen in many places, but there are some areas where they are concentrated.
Earthquakes travel in ripples or waves across the earth and through the layers of the earth. Seismology is the study of earthquakes and a seismologist is the scientist that studies earthquakes.
Geologists and seismologists use two different scales to measure how strong an earthquake is.
Humans developed many explanations for earthquakes before they had the understanding and instruments to study them scientifically.
No one can predict earthquakes yet, nor prevent them, but you can protect yourself by preparing for one.
This crust is made of basalt lava flows, which have erupted from volcanoes over millions of years. The outer core flows around the centre of the Earth, and the movement of the metals creates our planet’s magnetic field. The lower part of the upper mantle is made from both solid and melted rock (liquid), while the rock in the upper region is stiffer, because it’s cooler.


Land is made of continental crust, which is 8km to 70km thick and made mostly from a rock called granite. When this happens, under great pressure and heat, the rock in some places becomes squeezed, stretched, or folded and can break.
If a person were standing in just the right location and could see the surface of the earth during an earthquake, the ground would actually appear to be moving in a wave. This leads to the characteristic shape of an earthquake on a seismogram with a small P wave followed by a larger S wave. The Richter Scale measures magnitude, the amount of energy released by an earthquake by measuring how big a shock wave is. You can read about some of these ideas about Earthquake Myths and Folklore.Here's a myth from Mongolia, China. The shockwaves can travel through the surface of the earth but they can also travel through the layers of the earth where they bounce off of matter inside the earth. A tsunami happens when shocks from the earthquake create huge waves that come inland and strike communities along the ocean coast. One way scientists help is by comparing readings from widely spaced seismographic stations to determine the exact position of the earthquake's origin. The layer beneath the ocean bed is made of oceanic crust, which is about 8km thick and made mainly from a rock called basalt.
Because the P wave is traveling faster, the time between the P and S wave increases away from the earthquake. A gigantic frog which carried the world on its back, twitched periodically, producing earthquakes. The two largest earthquakes in the lower 48 states in the last 45 years have been in Idaho (1959 and 1983).
The estimates are that there are about 500,000 detectable earthquakes a year, 100,000 of those can be felt, and about 100 of them cause damage.


The location where these plates meet or come together is known as a fault.The squeezing and folding can stretch the rocks or push them together.
The epicenter of an earthquake is the place on the Earth's surface directly above the focus (more than one are called foci), which is the place inside the Earth where the quake originates. As the waves move, they can actually collide into one another and reverse direction, causing additional damage.
As an earthquake is recorded, the pen jumps back and forth on the paper showing the intensity of the earthquake. An aftershock is a smaller quake which follows the original one, but can still continue to cause additional damage to an already troubled area of land. Liquefaction, ground displacement, flooding, tsunamis, and fire are all hazards of earthquakes. Rocks can also break under this stress and release huge amounts of energy in the form of shock waves. When they reach shallow coastal waters they can grow to 35m (115 ft) high and cause massive flooding! Above the granite is sedimentary rock, which is made of bits of crushed rock and the remains of dead animals and plants. Some shock waves move through the ground before a volcano erupts, or underground where new crust is being formed. Learn more about the Richter Scale here.In addition to the Richter scale, scientists also use the Mercalli Intensity Scale to measure the amount and type of damage caused by the earthquake. It is very hard to imagine rocks bending and folding or even large areas of land sliding under layers of the ground.



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