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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

Percent of earth land mass above 1000 ft elevation?

Approximately 27% of Earth's land mass is above 1000 ft in elevation.

What is the direct measure of energy from mechanical wave?

Amplitude is the direct measure of energy from a mechanical wave.=Waves are produced by something (a medium) vibrating. The farther the medium moves as it vibrates, the larger the amplitude of the resulting wave. For example, you can increase the amplitude of a wave on a rope by moving your hand up and down a greater distance. To do this you have to use more energy. The energy is transfered to the rope. The greater amplitude is a direct measure of the increased energy.=

What is the relationship between solute solvent solution saturated unsaturated and supersaturated?

A solute dissolves in a solvent to form a solution; all the time that more of the solute can be dissolved it is unsaturated, but once the solution can hold no more of the solute it has become saturated.

What is an aquiclude?

An aquiclude is a layer of impermeable or low-permeability rock or sediment that prevents the movement of water. It acts as a barrier that restricts the flow of water and contributes to the formation of aquifers.

What is a G and G study in petroleum geology?

A G and G study in petroleum geology involves evaluating the subsurface structure and stratigraphy of a prospective area for hydrocarbon exploration. It stands for "geological and geophysical" study and combines geological mapping with geophysical data analysis to identify potential oil and gas reservoirs. This integrated approach helps in understanding the subsurface geology and is crucial for successful oil and gas exploration.

What position is the earth in during the day?

The position of the Earth is always a point on its orbit. For the Sun to rise at midday you would need to be on the arctic or antarctic circle on one day each year - the winter solstice, and there the Sun rises and sets at midday.

What is the surface materials of Saturn?

Saturn is a gas giant, composed mainly of hydrogen and helium. There is no solid surface on Saturn like there is on Earth. The outer layer of Saturn is composed of clouds of ammonia crystals and other icy materials.

Name of element symbal is EU?

The element with the symbol EU is Europium. It is a rare earth metal that is used in the production of phosphors for TV and smartphone screens, as well as in nuclear reactors for controlling nuclear reactions.

What is unique about the biosphere it is the only sphere that contains water the only sphere that doesn't support life because it exist entirely within other spheres?

The biosphere is unique because it is the sphere where life exists on Earth. It encompasses all living organisms and their interactions with the environment. Unlike the other spheres (atmosphere, hydrosphere, lithosphere), the biosphere is where living organisms thrive and play a crucial role in shaping the planet.

What is seismic energy?

Seismic energy is the energy released by the sudden movement of rocks in the Earth's crust, typically during an earthquake. This energy propagates in the form of seismic waves that can cause vibrations and shaking of the Earth's surface. Studying seismic energy allows scientists to understand the behavior of the Earth's interior and improve earthquake prediction and monitoring.

What would happen to the earths continents if mountain were not being continuously formed?

Without continuous mountain formation, erosion would gradually wear down existing mountains to create flatter landscapes. Eventually, the continents would become more level over time, with mountains turning into hills and plains.

How come you hear a sound when you bat your eyelashes?

When you bat your eyelashes, the movement creates a small amount of turbulence and friction in the air, which can produce a soft rustling sound that is amplified due to the close proximity to your ears. The sound is very subtle and typically only audible in a quiet environment.

What are the principles of seismic stratigraphy?

Seismic stratigraphy is a geologic approach to the interpretation of seismic data, allowing their application based on physical stratigraphy. Primary seismic reflections parallel the surface and nonconforming surface of the strata.

If 6 is x percent of 60 what is 25 percent of x?

6 is 10% of 60, so x must be 10 times larger, equaling 60. Therefore, 25% of x (60) is 15.

What do you need to start a fire?

To start a fire, you will need fuel (such as wood or paper), a spark (from matches, a lighter, or a fire starter), and oxygen. It's important to have a safe and controlled environment to prevent the fire from spreading uncontrollably.

What scale is used to measure earthquake intensity?

The moment magnitude scale is used to measure the magnitude of large earthquakes. The Richter scale is still used to make an initial estimate of the magnitude of larger earthquakes and to measure small and moderate ones (those with a magnitude below 7).

How does dissolving work?

When a solid substance is dissolved in a liquid, its individual particles break apart and disperse throughout the liquid. This process occurs due to the interactions between the solvent molecules and the solute particles, where the solute molecules are surrounded by the solvent molecules, preventing them from rejoining and remaining in a dispersed state within the solvent.

Barometric pressure ground level?

Barometric pressure at ground level refers to the atmospheric pressure at the Earth's surface. It is commonly measured in units of millibars or inches of mercury and can vary due to weather conditions, altitude, and geographic location. Changes in barometric pressure can indicate approaching weather systems and have effects on human health and behavior.

Why are the mountains like pegs buried in earth who proved this when how why?

In 1948, the Geologist Van Anglin stated in his book Geomorphology (on page no. 27) that it is quite well understood currently that there is a root for each mountain below the crust of the earth. The function of mountains on the earth is to fasten the crust of the earth. This fact was proven by the principle of hydrostatic balance of the earth as illustrated by the US Geologist Dutton, in 1889. He stated that the protrusions of the earth are immersed into the earth in a way that conforms to their height. Moreover, after the existence of the plates of the earth was proven in 1969, it became clear that the mountains are responsible for maintaining the equilibrium of all the plates. Further proof of this fact can be found in "Anatomy of the Earth (1968)" by French paleontologist and geologist. Page 220 of the book desribes mountains as "like pegs, have deep roots embedded in the ground". More proof can be found in "Understanding Earth" by Frank Press and Raymond Siever. On page 413 of their book it says that "mountains have roots deep under the surface of the ground".

What is the crust of the Earth?

The crust is the outermost chemical layer of the Earth, of hard and brittle rock, composed of oceanic crust and continental 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.

The crust is composed of igneous, metamorphic, and igneous rock, but primarily igneous rock. The crust is chemically divided into two types. Continental crust is the less dense of the two, granitic in composition, and the thicker of the two. Oceanic crust is more dense, basaltic in composition, and relatively thin. Oceanic crust is being recycled in roughly 200 million year intervals as new crust is being created at mid-ocean ridges and destroyed by the processes of subduction at underwater trenches. The more buoyant continental crust is on average much older, the oldest continental rocks being over 4 billion years in age. Both the oceanic and continental crust are floating on top of the asthenosphere, the physical layer of the upper mantle in which convection currents of heat push and pull the individual segments of crust (known as plates) around. The crust is the thinnest of Earth's layers, comprising a tiny fraction of the planet's total mass.

What do all continents have in common that paleontologists notice?

All paleontologists,(and other people), notice that on every continent, there were similar fossils. Obviously, not all prehistoric/Precambrian organisms could swim all the way across oceans, so the continents had to have moved. This proved Wegener's hypothesis(some really old scientist i learned about in science class)which was continental drift.

The first atmosphere that formed above Earth was most likely due to what process?

The first atmosphere on Earth was primarily formed through volcanic outgassing, which released gases such as water vapor, carbon dioxide, and nitrogen. These gases accumulated around the planet and eventually formed the primitive atmosphere.

What is well logging?

Well logging is the process of acquiring and recording data about the geologic formations and properties of a wellbore. It involves using tools to measure characteristics such as rock density, porosity, permeability, and fluid saturation to evaluate the potential for oil or gas production in a reservoir. Well logging is crucial for understanding the subsurface and making informed decisions during drilling and production operations.

What is HAARP?

HAARP stands for The High Frequency Active Auroral Research Program. The goal of this program is to further advance our knowledge of the physical and electrical properties of the Earth's ionosphere which can affect our military and civilian communication and navigation systems. The HAARP program operates a world-class ionospheric research facility located in Gakona, Alaska.

Is jewelry a mineral natural resource?

No, jewelry is not a mineral natural resource. Jewelry is created from metals and gemstones which are extracted from mineral deposits, making them products derived from minerals rather than minerals themselves.