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Geophysics
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.
1,480 Questions
What do you think is the basis of scientists in dividing earths lithosphere into several plate?
Geographical activities such as volcanic eruptions and earthquakes form the basis of this division.
What role does mass wasting play in the development of landforms?
mass wasting is the down slope movement of rock and soil under the direct influence of gravity.mass wasting is the step that follows weathering in the evolution of most landforms.
Is it a good idea to major in Geophysics Career wise?
If Geophysics is what you want to do, then yes its a fabulous idea.
Earth's crust is a thin layer made of?
Earth's crust is made of sedimentary, metamorphic, and igneous rock. The continental crust is composed primarily of granitic rock and can be up to 45 miles thick. The oceanic crust is composed primarily of basaltic rock and can be up to 6 miles thick.
What describes the crust where the yellow areas of the two circles are falling?
convergent plate boundary. :)
Why is it important to identify the areas which prone on earthquakes?
to alert the people who live in the particular place specially the people who are in the epicenter
The Earth's magnetic field is generated by the dynamo effect in the?
outer core of the Earth, where the movement of liquid iron generates electric currents. These electric currents create a magnetic field that extends around the Earth, serving as a protective shield from solar radiation and cosmic rays. The magnetic field also plays a crucial role in guiding compasses and helping birds and other animals with navigation.
What is an earthquake and a seismic activity?
A seismic activity is an earthquake... An earthquake is when the tectonic plates (under ground) clash together, which causes an earthquake. Earthquakes can be very small or huge depending on where the country is. They can kill thousands of people, knock down buildings and create huge cracks in the ground. They are measured on a Richter scale. :)
What is Wegener27s hypothesis of continental drift?
There is a theory of continental drift by Wegener. He thought that underneath where we stand (continental crust) is magma (lava). You know sometimes there are lily pads in the pond floating on the water and drifting, bumping, and pulling away from each other? That's just like the theory. Continental crust is divided into 7 different plates. When the plates are moving together, it's called a convergent boundary (convergent sounds like connected). When plates are moving apart, this is called a divergent boundary (divergent sounds like divided). The reason they call it continental drift is because the plates are slowly drifting. Sometimes, instead of convergent boundaries where the plates are slipping under each other and creating mountains and hills, they bump into each other. This causes an earthquake. The exact beginning of an earthquake is called an epicenter. Wegener's theory being supported is called plate tectonics.
Pumice is an igneous rock that forms when magma traps gas bubbles and cools quickly. The gas dissipates and leaves the distinctive porous nature of the pumice
When will the world end and how?
Depending on when during the 7 year tribulation the rapture of the church happens of which no man knows the day or the hour, after the tribulation Jesus comes to earth and rules the world for a 1000 years. after the rapture it will be at LEAST 1000 years before the earth is consumed by fire. I guarantee the world will NOT end in 2012 the rapture can happen in 2012 in which the saints will be taken up to meet the Lord.
The rapture is not the end of the world!
The Mayans are off by at least a thousand years.
What is it called when a hurricane causes the water of the ocean to rise much higher than usual?
The storm surge.
Where does new sea floor form?
It forms at the edges of Divergent Tectonic Plates; as opposed to the Earthquakes that are found at the Convergent Plate Boundaries [where one Plate subsides beneath the other Plate].
They both based on the amount of energy that is released during earthquake
What is the earths core made of?
Iron and Nickel
Answerthe 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 two, with oxygen looking slightly more probable, or maybe both.
Henry Hess
What force caused the movement of the continents from one supercontinent to their present positions?
the movement of convection currents in the mantle is the cause of plate motion.
A seismic wave is mechanical energy, and it arises in earthquakes or other shifts that affect the crust of the earth. The energy is transferred through the crust and core in wavesthat we identify as P-waves and S-waves. A link is provided below for more information.
Can we stop the core of the Earth from spinning?
No. And even if we could, the spinning of the rest of the Earth will quickly make the core spin again.
What affects the speed of seismic waves?
The speed of seismic waves are affected by the type of material that the waves are traveling through.
in other words (as an example): some type of waves can travel through rocks but not through liquids.
