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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

How are earthquake seismic waves similar to thunder and lighting?

it is a wave of Devansh

Earthquakes move through the ground in waves, much like how thunder does through air.

How are ingnous rock texture discribed?

This question has a very complex answer and you would do best to look at a chart, in order to have a full grasp of the answer. There are several categories and subcategories, so the answer can vary, depending on the depth of the answer being sought and the setup of the chart you are using. Because of this fact, if you are learning this subject in school, and seeking to answer your teacher's / professor's question, then you might want to check your book for a chart first.

To answer your question though, the categories are as follows:

Phaneritic, which means it contains coarse grains / visible crystals. Within the phaneritic category, there is a subcategory which contains larger crystals, called pegmatitic, (but they are still phaneritic too).

Porphyritic, which means it contains a mixture of coarse and fine grains, to put it simply. (To put it less simply, it is fine-grained and contains appreciable phenocrysts.)

Aphanitic, which means it is fine-grained.

Glassy, which looks like glass. (Think of obsidian.)

Vesicular, which contains gas holes, made from gas bubbles. (Think of pumice.) But depending on the chart, this category may or may not fall under glassy, since pumice, for example is actually made of frothy glass. Futhermore, some types of vesicular rocks may be subdivided into a category called frothy.

Pyroclastic, which is made up of fragmented volcanic debris. (However, this category may be divided depending on fragment size. The subcategories are volcanic tuff, (which has fragments under 2 mm in size), and volcanic breccia, (which has fragments over 2 mm in size).

Again, the answers sought can depend on the depth of knowledge being sought. For example, if you are seeking this answer for a school assignment, your teacher or professor might only be seeking phaneritic, aphanitic, porphyritic, glassy, and pyroclastic. However, they may want to see the subcategories of pegmatitic, frothy, vesicular, volcanic tuff and volcanic breccia. The answers can be more in depth too, but I hope this is enough to help you. Again, I recommend looking at any handouts or your book, if you are a student, in order to ascertain just what depth of knowledge your teacher / professor expects you to have.

What is the name of disintegration and dissolving of surface and subsurface rock erosion mass wasting land mass denudation weathering?

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.

Do your feet exert a compressive force on the ground?

Yes. Of course, the ground exerts an equal-abd-opposite compressive force on you.

===========================

Answer #2:

Experiment:

-- Place a raw egg between the ground and your foot.

-- What did you observe ? Was there any evidence

of a compressive force anywhere ?

The sphere of metal inside Earth is called?

The sphere of metal inside Earth is called the Earth's outer core. It is primarily composed of iron and nickel and plays a crucial role in generating the planet's magnetic field.

How much degree is rotating the earth?

earth is approximately rotating at 66 and a half degrees

Continental polar maritime polar continental tropical and maritime tropical are types of?

Types of air masses that are characterized by their temperature and humidity characteristics. Continental polar and maritime polar air masses are cold and moist, while continental tropical and maritime tropical air masses are warm and humid. These air masses determine the weather conditions when they interact with each other.

What kind of natural disasters occur in Zambia?

Zambia has had floods, droughts, livestock diseases, plant and disease infestation and plant parasite invasions.

Is it good for earthquakes to happen?

Neither, It kills and damages lots of people/houses but It creates new land witch could be useful, but It's better it didn't happen.

Why are there more earthquakes occurring near plate boundaries than near the center of a plate?

The movement of the plates relative to one another much greater stress along faults than is typically found away from plate boundaries.

Was anything done to prevent the haiti earthquake?

There were some efforts to improve preparedness for earthquakes in Haiti, such as constructing more earthquake-resistant buildings and providing training for emergency response teams. However, the severity of the 2010 earthquake highlighted the need for further improvements in infrastructure and disaster preparedness in Haiti.

What are the practical ways of coping with geological hazards cause by earthquakes volcanic eruption and landslides?

Practical ways to cope with geological hazards include implementing early warning systems to alert communities about impending earthquakes or volcanic eruptions, allowing for timely evacuations. Building infrastructure that adheres to strict seismic codes can reduce damage and casualties during earthquakes. Additionally, conducting regular drills and educating the public about emergency preparedness can enhance community resilience. For landslides, proper land use planning and vegetation management can help stabilize slopes and mitigate risks.

What magma compositions will be produced by partial melting of the upper mantle?

Partial melting of the upper mantle primarily produces basaltic magma compositions. This occurs because the upper mantle is rich in ultramafic rocks, which contain high levels of magnesium and iron. As these rocks partially melt, the resulting magma is typically low in silica and has a higher density, leading to basaltic compositions. This process is commonly associated with mid-ocean ridges and hotspot volcanism.

How long does it take for vinegar to dissolve pumice?

Vinegar, which contains acetic acid, can slowly dissolve pumice, but the process is quite slow. Depending on factors like the concentration of the vinegar and the surface area of the pumice, it may take several hours to days for noticeable dissolution to occur. However, complete dissolution could take much longer, and in practical terms, pumice is relatively resistant to vinegar compared to other substances.

Can a methane bubble sink a ship or a plane?

A methane bubble itself is unlikely to sink a ship or a plane directly. In water, large methane bubbles can rise quickly and potentially disrupt the buoyancy of a vessel, but they wouldn't have enough mass to cause sinking. In the air, methane is lighter than air and would dissipate quickly, posing little threat to aircraft. However, if a significant release of methane were to ignite or cause an explosion, that could pose serious risks to both ships and planes.

What is the proponent of Seafloor spreading?

The proponent of seafloor spreading is primarily Harry Hess, an American geologist who proposed the theory in the early 1960s. He suggested that new oceanic crust is formed at mid-ocean ridges through volcanic activity, and as it moves away from the ridge, it gradually cools and becomes denser. This process helps explain the movement of tectonic plates and is a key component of the broader theory of plate tectonics. Seafloor spreading provides insights into the geological history of the Earth and the mechanisms behind continental drift.

What the most active earthquakes zone?

The most active earthquake zone in the world is the Pacific Ring of Fire, which encircles the Pacific Ocean. This area is characterized by numerous tectonic plate boundaries, leading to frequent seismic activity and volcanic eruptions. Countries like Japan, Indonesia, and Chile experience some of the most significant earthquakes due to their location along these tectonic boundaries. The Ring of Fire accounts for about 90% of the world's earthquakes.

How much does chromicloriperoxite weigh?

Chromicloriperoxite is not a widely recognized or standard chemical compound, and there may be some confusion regarding its name or existence. If you meant a specific chemical compound, please clarify its name or formula. For accurate information on the weight of a compound, its molecular formula is necessary to calculate its molar mass based on the atomic weights of its constituent elements.