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Geophysics

~3700 answered questions
Parent Category: Earth Sciences
The study of Earth using the combination of Geology and Physics, it lets us understand what is going on under the Earth's surface. Find questions on different types of seismic activities such as earthquakes and volcano eruptions here.
Magma is a term for rock in liquid form. It differs from lava only in 1 respect, its location. Whilst lava is the name for liquid rock released from a volcano in an eruption, magma is the name for liquid rock found beneath the surface of a planet. The temperature for magma is around 700-1300 degrees…
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The aurora is a glow observed in the night sky, usually in the polar zone. For this reason some scientists call it a "polar aurora" (or "aurora polaris"). In northern latitudes, it is known as "aurora borealis" which is Latin for "northern dawn" since in Europe especially, it often appears as a redd…
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A storm surge is slight rise in the ocean associated with a tropical cyclone, which manifests itself as a large rise in water level at the shore as the storm hits. This can vary from a few feet to 20 feet or more. It is a consequence of both the low pressure at the center of the storm raising the oc…
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Some believed it's from the sunlight in the sun but it is technically proven it is the gases in the earth's atmosphere...I think....
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Aurora Borealis The Aurora Borealis is a display of colored lights in the sky, also called northern lights, caused by the interaction of particles from the sun with the upper atmosphere near the North Pole. A similar display, called the Aurora Australis, occurs in the atmosphere above the South P…
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Continental Drift was put forward by Alfred Wegener.(1880-1930). One piece of evidence on which he based his ideas was the similarity of shapes of the South American and African coastlines. Another was the fact that the same types of fossil are found in both places.
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The earths plates will move around and now and again hit each other this will cause the earthquake the plate tectonics will collide and slide past each other causing the earth to shake known as the earthquake
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Seismic waves are produced by earthquakes, rather than the cause of them! The most damaging seismic waves are the surface waves of which there are two types. Love waves and Rayleigh waves. For more information, please see the related links and question.
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If you live near a lark lake or by the ocean you will most likely be harmed, should there be a tsunami. Tsunamis start by earthquakes begining under water. That causes a GIGANTIC wave to start and fall on everyone near the shore. So if you live in Nevada and there is a tsunami in Maine, you shouldn'…
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Answer Island arcs and chains, sedimentary fossils at the top of the Himalayas, rift valleys, mid-oceanic ridge, ages of rocks in certain areas, co-existing fossils in now separated areas, faults, subduction volcanoes, GPS measurement data, earthquakes.
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Because the core of the earth is hot simply making more cell of life on the earth. That's why
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Answer: Volcanic activity, earth quakes, erosion, and wind.
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Continental drift is the movement of the Earth's continents relative to each other. The hypothesis that continents 'drift' was first put forward by Abraham Ortelius in 1596 and was fully developed by Alfred Wegener in 1912. However, it was not until the development of the theory of plate tectonics i…
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The combination of a transverse waves and a longitudinal waves produce surface waves. The waves found in water are a good example. When a wave moves through the waver, particles travel in clockwise circles, and the radius of the circles decreases as the depth into the water increases.
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I think your question is how did the crust originate. Scientists believe our planet originated about 4.5 billion years ago, and was extremely hot. The outer layer began to cool first, but extremely slowly. The outer layer, is called the crust, and ranges from 10 to 70 km thick. (see link) The crust …
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very dangerous! you can die from them
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If the Earth were flat, we would expect a curvature rate of zero inches per mile. As it is, the Earth is not flat, and it's curvature rate is 8 inches per mile. 63,360 inches are in a mile, and the 8 inch drop is spread over that distance. Our eyes are not able to detect an approximately 1/10,000th…
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Plate tectonics Plate tectonics is the study of the individual large masses of material on the surface of the earth, and how they relate to and move relative to each other. they are basically left overs from what the earth had been before, now the earth are all broken into little pieces.
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RICHTER SCALE The Richter scale (known as the local magnitude scale to seismologists) was originally developed to measure small to moderate magnitude earthquakes in southern California by Charles Richter and Beno Gutenberg. The numerical levels indicate the energy released by a particular quake. T…
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The inner core is made out of iron and nickel and it is a solid.
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The only way humans could possibly be responsible for a tsunami is if they set off about 20 atomic bombs at the bottom of the sea. It takes a tremendous amount of energy to cause a tsunami like a large earthquake or an underwater volcano erupting. Clearly their is no way to prove this was act wrath …
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The earth is not flat, it's in a cube shape. * * * * *It is, in fact shaped like a flattened sphere.
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Yes. But how do u know?
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A branch of geology that uses physical principles to study the properties of the earth
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Continental drift refers to the movement of the Earth's continents relative to each other. The theory was first proposed by Frank Bursley Taylor in 1908, at a meeting of the Geological Society of America. Prior to this, various notable scientists such as Abraham Ortelius, Francis Bacon, Antonio Snid…
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3651/4 days. (rounded)
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Tectonic plates are segments of the Earth's lithosphere, the hard rocky outer shell composed of the crust and the uppermost mantle. This shell is divided by lines of faults, ridges of plate creation, and zones of plate destruction. All in all, there are roughly 30 tectonic plates which cover the ent…
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Tectonic plates are segments of the Earth's lithosphere, the hard rocky outer shell composed of the crust and the uppermost mantle. This shell is divided by lines of faults, ridges of plate creation, and zones of plate destruction. All in all, there are roughly 30 tectonic plates which cover the ent…
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Heat radiation is simply the movement of heat across an open space. it is basically just diffusion
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The Haitian earthquake rates as along with the Sumatran earthquake and tsunami as the most terrible earthquake since 1975. Tangshan, Kashmir, and Sichuan round out the top five.
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Its fossils are found in many different places like South America and Africa which support the theory of continental drift.
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In drought conditions or where the supply of groundwater is cut off, a geyser will become inactive or extinct.
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i ate a cat
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Plates in your moms kitchen.
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The Sun's magnetic field produces charged particles and these charged particles are usually radiated out into space. Sometimes these charged particles may be caught in Earth's magnetic field and as they enter the upper atmosphere of Earth, they are in contact with other gases in the upper atmosphere…
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A sudden shift of the earth's crust along a fault could result in an earthquake.
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The idea that the continents were once one super-continent and subsequently moved apart is the basis of the theory of continental drift. Continental drift was first proposed as a scientific hypothesis with evidences by Alfred Wegener early in the twentieth century. Unfortunately, the evidence he was…
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its the earths crust
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The inner core is hotter. The outer core is composed of liquid iron and nickel along with small amounts of lighter elements, with temperatures ranging from 4,000 degrees C to 6,100 degrees C near the boundary with the inner core. Temperatures of the inner core can reach 5,740 C, and pressures ar…
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It started on August 23, 2005 and ended on August 31, 2005
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Aurora Borealis which is also known as "Northern Lights" because it is seen mainly and clearly in the Northern Hemisphere, is a band of light of red and green, seen in the sky at night or by sun set near the North Pole. The Aurora is caused when winds of electrically charged solar particles and fla…
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Depending on the type of Crystal, they can range from low to incredible prices.
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The movement of earth's crust along a fault is called a transform fault. At a transform fault, the plates slide past each other and crust is neither destroyed nor created. If there geological structures don't "slip" easily, energy can build up as the plates try to slide past each other. Eventually t…
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A earthquake would happen!
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The Earth's outermost layer of hard brittle rock is called the crust. The crust is typically about 23 miles thick beneath continents, and about 6.5 miles thick beneath oceans. The crust is relatively light and brittle compared to other Earth layers. Most earthquakes occur within the crust.
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A geothermal source is, quite literally, a source of heat from the earth. (Geo means the earth, and thermal means heat.)
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plates that shift under the surface of the earth on lava referring to the theory of plate tectonics
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Composite VolcanoesComposite Volcanoes. Composite volcanoes are tall, cone shaped mountains in which alternate layers of lava alternate with layers of ash. This happens when smooth lava flows alternate with explosive eruptions of lava fragments.
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when hydrogen burns in the presence of oxygen.
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Tectonic plates are segments of the Earth's lithosphere, the hard rocky outer shell composed of the crust and the uppermost mantle. This shell is divided by lines of faults, ridges of plate creation, and zones of plate destruction. All in all, there are roughly 30 major and minor tectonic plates w…
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ANSWER: Its called the ring of fire because of all the volcanic activity surrounding the Pacific Ocean
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Transverse waves are moving waves that consist of oscillations that occur perpendicular to the direction of energy transfer. Longitudinal waves are waves that have the same direction of vibration as their direction of travel.
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Well a warm object gives off infrared electromagnetic radiation, which can be absorbed in another object, heating it up.
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The similarity between colliding and separating tectonic plates is that both are areas of geologic instability. Also, the two regions have a better chance of being a source of vulcanism because of the nature of the instability. Even though they might be seen as "opposites" as regards the action of t…
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Storm surge occurs when the wind of a hurricane or similar storm drives ocean water onto land.
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AnswerTemperature can range from 0-700°C; average temperature is 25°C
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Al(Al,Si)3O8
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2 billion
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The tectonic (or lithospheric) plates are composed of the rocky crust and outermost rocky layer of the mantle which are fused together. The entire outer surface of the planet is divided into these plate formations, roughly 30 in total, which vary in size from over 100,000,000 square miles (Pacific P…
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In fact, the Earth is not a perfect sphere. It's poles are flattened and its equator bulges outwards. This is due to centripetal force as the planet spins on its axis. However, setting this fact aside for a moment, Earth is spherical in shape because its gravity is pulling everything towards the c…
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The 8 pieces of evidence are that 1) the land masses fit together like a puzzle; 2) the fossil evidence is similar; 3) the age and type of rocks are the same; 4) the mountain chains seem to continue from continent to continent; 5) climate changes; 6) coal deposits in the eastern U.S. and Siberia; 7)…
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Bouguer anomaly - This anomaly corrects for the gravitational attraction of the rock above sea level.This correction is done after Free Air correction which accounts to the height of the measurements above sea level.The simple Bouguer correction is calculated assuming that the rock above sea level i…
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The main features of plate tectonics are: The Earth's surface is covered by a series of crustal plates. The plates are composed of crustal rock and solid upper mantle which is called the lithosphere. Plates are composed of continental and oceanic crust. The oceanic crusts are continually movi…
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flame, lighting bolts, electrical sharks
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Plates move for more than one reason.1) Ridge-push forces: the sea floor is sloped and the high elevations on ocean ridges create a force that pushes the plate away.2) Slab-pull force: Plates that subduct pull the plate down3) Convection in the Mantle. The lithospheric part of the mantle cannot conv…
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Albert wagener
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Iron and Nickel the core must be iron metal along with some nickel. But it's less dense than pure iron, so about 10 percent of the core must be something lighter. Sulfur and oxygen are the two best candidates, though hydrogen has also been considered. But the money is still on one of the other tw…
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glass ones, and metal ones
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Tectonic plates are composed of the crust and upper mantle rock which is lighter than the more dense mantle. Rising and falling convection currents in the mantle cause imperceptibly slow movements in the plates (on the rate of fingernail growth). The source of the heat driving the convection current…
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1. Found in Europe, Asia, and etc.2. Average Temperature- 56F3. Average Rainfall- 20-50 in.
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Earthquake magnitudes are measured using seismometers. Based on the amplitude of the seismic waves, seismologists can make a preliminary estimate of the moment and Richter magnitudes of the earthquake. For a more accurate estimate of the energy released, seismologists use the moment magnitude scale…
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Alfred Wegener came up with the theory continental drift
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tsunamis are caused when an earthquake occurs in the sea and the two plates underneath the earth's crust collide and then bounce back up creating a huge wave.
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It is easily possible to see how the western coast line of Africa could fit into the eastern coast line of South America, and other such matches can be found in many locations, but aside from the similarity of shapes, close examination of the fossil record, the mineral content, and every other aspec…
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Earths core is made out of molten lava and hard rock, many previous atempts to find a sample were called off and said that there is a risk of distruction and a possible chance of blowing the planet up.
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He proposed this idea in 1912.
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An example of evidence from landforms that supports Alfred Wegener's theory of continental drift is rock formations. Another example is fossils found in freshwater rocks suggests that the animals did not cross any oceans.
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they are formed by heat and pressure
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states platforms move
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The most common element in the earth's crust is oxygen.
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Alfred Wegener proposed the theory of continental drifting to have the concept be openly discussed. He felt that the continents fit together much like a jigsaw puzzle and therefore must have been connected at one time.
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They float around on the earths crust, occasionally crashing / rubbing. This is the cause of earthquakes and mountain ranges.
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they are found in Thunder Bay
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(not seismic, seismic wave)Seismic waves are waves of energy that travel through the earth.
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Consisting of over seven thousand islands, experiencing near daily earthquakes, and being located on the Ring of Fire, the Philippines are extremely vulnerable to the damage that can be inflicted by tsunamis.
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Hurricane Rita formed in the Gulf of Mexico on September 17, 2005, less than three weeks after the landfall of Katrina, and threatened the area with another Category 5 hurricane. She became a hurricane on September 21, made landfall on September 23, and dissipated on September 26. Fortunately, Rita …
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Alfred Wegener proved continental drift and Pangea. If you are in Mr. Gross's science class, you shoul dno that.
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minerals showing appearance of lining up
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Now that we have access to space, the easiest way to prove the Earth is spherical is to leave it and view it from a distance. Astronauts and space probes have done just that. Every picture of Earth ever taken shows only a circular shape, and the only geometric solid which looks like a circle from an…
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The earth (and other planets) are spherical because the force of gravity organized them and they took this form as a preference. When very large masses of material accrete to form something the size of a planet, gravity increases and increases as the material comes together. The mass begins to "pac…
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Weathering is the process in which materials are broken down either chemically or physically. Weathering and erosion are commonly confused. However, erosion is the transport of material that has been previously eroded. Therefore, the answer is weathering.
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The biggest tsunami was the tsunami that occurred on July 1958 in Lituya Bay, Alaska.
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The most abundant element in the crust of Earth is oxygen; the most abundant metal is aluminum. The Earth's crust consists of the following elements and percentages: Oxygen--47%Silicon--28%Aluminum--8%Iron--5%Calcium--4%Sodium--3%Potassium--3%Magnesium--2%Titanium--0.5%All others--<1%Quartz - Si…
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