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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 is a mountain built from magma?

A mountain built from magma is called a volcanic mountain. It forms when magma from beneath the Earth's surface erupts through a vent or fissure, cools, and solidifies to create layers of volcanic rock and ash over time. Examples include Mount St. Helens in the United States and Mount Fuji in Japan.

What discovery helped to prove that alfred wegner's theory of continental drift was possible?

The discovery of seafloor spreading and magnetic striping on the ocean floor in the 1960s provided compelling evidence for Alfred Wegener's theory of continental drift. This process showed how new oceanic crust is formed at mid-ocean ridges and helps move the continents apart, supporting the idea that continents are not fixed but can drift over time.

What is the importance of preserving energy sources?

Energy supply must be sustainable and diverse. And energy needs to be used more efficiently. A sustainable energy supply, both in the short- and the long-term, is needed for promoting both economic development and people's quality of life, as well as protecting the environment.

We also need a greater diversification of energy resources - if we are largely dependent on one fuel source, we risk price rises and supply disruptions.

Energy is a precious resource which must be conserved. Improved energy efficiency, therefore, in our homes, factories and transport needs to be strongly encouraged. Energy supply must be sustainable and diverse. And energy needs to be used more efficiently. A sustainable energy supply, both in the short- and the long-term, is needed for promoting both economic development and people's quality of life, as well as protecting the environment.

We also need a greater diversification of energy resources - if we are largely dependent on one fuel source, we risk price rises and supply disruptions.

Energy is a precious resource which must be conserved. Improved energy efficiency, therefore, in our homes, factories and transport needs to be strongly encouraged.

Does the continental drift theory prove wegeners case?

Yes, the case of the Mesosaurus does support Wegener's theory of continental drift because Mesosaurus however were-- as stated very well, A non-pelagic freshwater species from the Permian limited to a narrow range in the south east tip of South America and South Africa. In my opinion we cannot totally rule out "Accidental" ocean going land and freshwater as examples do exist (e.g Central and South American land tortoises to and from Galapagos) but the gravity of the drift theory favors conjoint land else narrow very narrow seaways for which rafting or limited range free swimming could be a mechanism of spreading breeding populations. My point being we can not exclude the possibility of animals being able to cross minor bodies of water because we have more modern examples for which swimming or rafting on debris were plausible. Egrets are a flying example of how species may be distributed across large bodies of water and so aren't perfect evidence. Common egrets were blown over from Africa to South America late in the 1800s in a massive storm system. Through replication and migrations they have reached the Piedmont of the Carolinas , central Alabama-Georgia and western Tennessee.

Which formation occurs when magma pushes all the way through the exterior of the Earth's crust?

When magma pushes all the way through the Earth's crust, a volcanic eruption occurs. This can lead to the formation of different landforms such as volcanoes, lava flows, and volcanic mountains.

Are gps watches affected by seismic activity?

GPS watches may be affected by seismic activity if the satellites in the GPS system are affected by the movement caused by the activity. However, the impact on the accuracy of the GPS watch would likely be minimal and generally not noticeable by the user.

Which aspect of magnetic reversal provides evidence of continental drift?

Periodically, the magnetic field of the earth reverses polarity. The direction of the magnetic field is recorded in the magnetic properties of rocks when they are erupted.

Rocks are being continuously added at sea floor spreading regions, and thus the magnetic reversals are recorded as pairs of parallel 'stripes' alongside the mid ocean spreading ridge.

Is it true as magma cools it's atoms tend to move away from each other?

The slower the rate of cooling the larger the size of the crystals that can develop.

What type of area was Rainbow falls formed in?

Rainbow Falls was formed in a volcanic area, specifically within the Waimanu Canyon, which was carved out by volcanic activity on the Big Island of Hawaii. The waterfall flows over a basalt cliff, showcasing the geological features of the volcanic landscape.

Is it true that an earthquake is any seismic vibration of earth caused by the slow release of energy?

No, an earthquake is a sudden and rapid shaking of the ground caused by the movement of tectonic plates beneath the Earth's surface. This movement releases built-up stress in the Earth's crust and generates seismic waves that produce the shaking felt during an earthquake.

What process can change igneous rock into metamorphic rock?

The process that can change igneous rock into metamorphic rock is called metamorphism. This process involves heat, pressure, and/or chemically active fluids altering the mineral composition and texture of the igneous rock without completely melting it. This transformation typically occurs deep within the Earth's crust or upper mantle.

What are Auroras produced by?

The sun is constantly releasing charged particles out into space (electrons, protons, etc). This is known as the Solar Wind.

Occasionally, a solar flare or coronal mass ejection releases a significant quantity of these particles (millions or even billions of tons of them).

When they impact the Earth's magnetic field, they can cause the magnetic field lines to break and reconnect, which causes the charged particles to rush towards the poles.

When these particles hit the upper atmosphere, they react with the atoms and molecules of the air and cause them to glow with the characteristic colours associated with the aurora.

Can volcanic eruption and seismic tremors produce large mudflows and debris flows?

Yes, volcanic eruptions and seismic tremors can trigger large mudflows and debris flows by mobilizing loose volcanic material such as ash, rocks, and soil. These flows pose significant risks to nearby communities and infrastructure due to their rapid speed and destructive potential. Emergency preparedness and early warning systems are essential in areas prone to these hazards.

LAB 4-7 continental drift answers?

Continental drift refers to the movement of Earth's continents relative to each other over time. The theory of continental drift was proposed by Alfred Wegener in 1912, suggesting that all continents were once connected as a single supercontinent called Pangaea and have since drifted apart. Evidence supporting continental drift includes the matching shapes of continents, similar fossil distributions, and the alignment of mountain ranges across different continents.

How fertilizers increase soil fertility?

As we all know that nitrogen is esential for plants which is not directly taken by plants,so in industries nitrogen is collected which is convert into crystal like formation.We feel cold if we take some fertilisers in our hand and deep it in water as the nitrogen is very cool gas.

What type of technology saves lives by warning people of an approaching storm?

Atmospheric science and Meteorology.

Weather radars are used to monitor precipitation rates (how heavy rainfall is etc) as well as track storm courses and speed, and estimate their exact type. Weather satellites using infra-red cameras are also able to track large scale storm systems due to the thermal (temperature differences) between the eye of a storm (tropical cyclone) and the colder surrounding cloud tops, whereby the larger the difference, the more intense the storm.

Who is The Father of the Theory of Continental Drift?

Alfred Wegener is considered the father of the theory of continental drift. In the early 20th century, he proposed the idea that the continents were once connected and had drifted apart over time, forming the basis for the modern theory of plate tectonics.

Does ganymede shows evidence of ancient plate tectonics?

Yes, Ganymede shows evidence of ancient plate tectonics, including grooved terrain that may be related to the movement of tectonic plates. This suggests that Ganymede's icy surface has experienced significant geological activity in the past.

What is the average wind speed in Brazil?

The average wind speed in Brazil varies depending on the region, but it generally ranges from 3 to 7 meters per second. Coastal areas and higher-altitude regions tend to experience higher wind speeds compared to inland areas.

Which Earth layer is responsible for filling in gaps left by seafloor spreading?

The process of seafloor spreading occurs at mid-ocean ridges, where new oceanic crust is formed. As the crust moves away from the ridge, it cools and contracts, creating gaps. The mantle beneath the Earth's crust, known as the asthenosphere, is responsible for filling in these gaps through upwelling of magma, solidifying to form new oceanic crust.

What temperature do olivine and calcium rich plagioclase feldspar crystallize from magma?

Olivine typically crystallizes at temperatures between 1,200 to 1,400 degrees Celsius, while calcium-rich plagioclase feldspar crystallizes at slightly lower temperatures between 900 to 1,200 degrees Celsius from magma.

Who explained that the geological processes seen happening on the earth now have shaped Earths geological features over long periods of time?

James Hutton, often regarded as the father of modern geology, proposed the principle of uniformitarianism in the late 18th century. This principle states that the same geological processes we observe today, such as erosion and volcanic activity, have been at work shaping Earth's features over long periods of time. This idea laid the foundation for understanding the gradual changes that have occurred in Earth's geological history.

How many cm the group moved horizontally and vertically during the earthquake in japan 2011?

During the earthquake in Japan 2011, parts of Japan moved horizontally up to 4.8 meters and vertically up to 1.2 meters due to tectonic shifts along the fault lines. These movements were a result of the intense seismic activity and the release of energy along the fault lines.

Is the Earths rotational axis tilted 23.5 degrees to the plane of orbital rotation around the Sun?

Earth is tilted at 23.5 degrees. it is thought to be of an impact by a moon size object billions of years ago.

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Another take on the same question:

The Earth's axis is not parallel to anything else. The angle of 'tilt' depends on what

you're comparing it to. If you compare it to the perpendicular to the plane of Earth's

orbit, then the angle is about 23.5 degrees. It doesn't require an explanation, since

no planet has an axis that's perpendicular to the plane of its orbit, there's no reason

why it should, and the angle of 'tilt' is different for each planet.

Are S waves transverse or longitudinal?

S waves are transverse waves, which means the particles in the medium vibrate perpendicular to the direction of wave propagation. This is in contrast to P waves, which are longitudinal waves where the particles vibrate parallel to the wave direction.