Why do magmas rise toward Earth's surface? Magmas are mainly liquid and contain dissolved fluids such as water; most are less dense than the adjacent solid rock. Most magmas are richer in silica than most crustal and upper mantle rocks. Magmas are more viscous than solid rocks in the crust and upper mantle. all of the above

After one island has experienced mass extinction of its mainland species, the chances are that the closer and more distant islands will have no consequences when it comes to their equilibrium.

Explanation:

If an island experiences devastating volcanic eruption, and the majority of its mainland species are destroyed, the island will have huge consequences when it comes to its equilibrium number of species. The reason for this is that the equilibrium number of species represents the optimal number of species, or rather the number of species that is capable on surviving on the available resources, not more, not less. With the majority of the mainland species gone, the island will have significantly less species than the equilibrium number of species, so it will take some time in order that number to be achieved.

Because it is an island we are talking about, and mainland species in question, the nearby and more distant islands will not have any consequences on their equilibrium number of species. This is because the species on those islands will not be affected, as they don't have any direct connection with the mainland species of the island in question. Also, the mainland species from the other islands will not be able to migrate in mass numbers toward the island that experienced disaster, but only accidentally and under particular conditions, but still in very small numbers, thus maintain the balance.

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Answer:

It would change the streams content and erosion capacity.

Explanation:

The addition of a constant source of fine sand and gravel to the stream would affect it in several different ways. Firstly, the addition of more rocks and silt would make the water of the stream cloudier. This may have some effect on the ecosystem and hunters that rely on transparent waters catch prey.

Secondly, the new sediment added to the stream would also increase the ability of the stream to erode the bed through abrasion and attrition, and would also increase the sediment load in suspension.

Finally, the presence of more sediments in the stream would affect the plant life at the bottom of the stream and also affect the amount of sunlight that can penetrate to the stream bottom during the summer.

Answer:

n irrigation system, developed in Iran, that taps into groundwater through a ... the urban center of an Islamic city; it is dominated by a central mosque and bazaar.

Explanation:

From the given choices the true statement is Surface winds blow parallel to isobars.

Answer: Option B

Explanation:

The winds which flow near the isobars, flow in the parallel direction of the isobars. They are not absolutely parallel to each other but are this much parallel that the purpose of the flight planning can be fulfilled with this.

These winds flow in perpendicular position to isobars which are present at that particular surface and they flow in this direction due to the acting of the force of friction in that area. This force of friction can also change the direction and the flow of the wind.

Answer:

d. Dominican Republic

Explanation:

The Euro-Amerindian Mainland is an area that stretches from Mexico to Panama and was a self sufficient zone dominated by hacienda land tenure

Answer:

d. The Dominican Republic.

Explanation:

hope that helped

Answer:

The black hole in the nucleus of the Milky Way Galaxy could not be the remnant of a single dead star.

Explanation:

The very center of the galaxy is known as the nucleus of the galaxy. The nucleus of the galaxy is hidden due to the dust particles present in the galaxy, which eventually covers the light of the nucleus.

The nucleus of the galaxy is filled with numerous stars and dust and the radiation emitted by them. The black hole lies at the center of the galaxy.

These super-massive black holes could not be the remnant of a single dead star because these holes are very large.

So, the correct answer is no.

Answer:

No

Explanation:

The mass of a black hole formed from a single star would be in the range of 5 to 80 solar masses.

The mass of the black hole at the nucleus of the Milky Way is 4.7 × 10⁶ solar masses.

The image below shows a supermassive black hole. We see no light in the centre, because the black hole absorbs it. We do see light from the accretion disk, the material that gets heated as it spirals into the hole.

Answer:

Both France and England were feudal kingdoms by the time the Magna Carta was written. The fact that they were feudal is relevant in the sense that the king did not have absolute power over the land, but had to share this power to a great extent with local lords who ruled over smaller areas.

However, the Magna Carta set a tradition in English Common Law that limited the power of the monarch, because the monarch was became a subject constraint by the laws, and the people became subjects of certain protections and rights.

This did not happen in France where the king eventually gained more and more power with the decline of feudalism. By the Renaissance Era, France was ruled by monarchs who had absolute power, while in England kings had less power every decade, and had to negotiate with Parliament.

This is also a reason why France overthrew its monarchy through a violent revolution, while in England, the transition from monarchy to parliamentary democracy was more peaceful.

Final answer:

The Magna Carta's signing in 1215 differentiated England from France by limiting royal authority and establishing the rule of law and principles of due process. England's path towards a constitutional monarchy and parliamentary democracy contrasted with France's absolutist monarchy. Over time, the Magna Carta influenced the development of representative government and balanced power structures.

Explanation:

In the study of medieval history, the distribution of power in England differed significantly from that of France, particularly after the signing of the Magna Carta in 1215. This document was a turning point, as it established fundamental legal principles that defined the limits of royal authority and laid the groundwork for the rule of law and the protection of individual rights. Unlike the absolute monarchy in France, where the king had more centralized control, the Magna Carta ensured that the English monarchy was subjected to the law and had to respect the rights of nobles and eventually, through the evolution of common law, all citizens.

In England, the Magna Carta required King John to consult nobles before making arbitrary decisions such as implementing taxes, and it stipulated that no free man could be punished except through the lawful judgment of his peers, effectively establishing the principle of due process. This led to the development of a representative government and established the foundation for constitutional monarchy and parliamentary democracy, while France continued with a more absolutist monarchy until the French Revolution. The power dynamics in England started to shift, with a balance of power emerging between the king and the nobility and later, a more formal institution known as Parliament began to take shape, curbing the absolute powers of the monarchy and providing a model for governance that influenced western political systems, including that of the United States.

Answer:

A. Karsty Topography

Explanation:

Karsty topography is characterized by numerous caves, sinkholes, fissures, and underground streams and it is usually found regions of high rainfall where bedrock consists of carbonate-rich rock, such as limestone, which is easily dissolvable

Answer:

Explanation:

Hydroelectric dams can emit greenhouse gases like methane due to the decomposition of organic matter in the reservoirs they create.

When a dam is constructed, it often results in the flooding of large areas of land, including forests, vegetation, and soil. As this submerged organic material breaks down underwater, it undergoes anaerobic decomposition, a process that occurs in the absence of oxygen. During anaerobic decomposition, microorganisms produce methane as a byproduct, and this methane can then be released into the atmosphere.

Methane is a potent greenhouse gas, with a much higher heat-trapping capacity than carbon dioxide over a shorter timescale. Therefore, even though hydroelectric dams don't burn fossil fuels directly to generate electricity, the methane emissions from the decomposition of organic matter in the reservoirs can contribute to the overall greenhouse.

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When an ocean plate goes under a continental plate at a subduction zone, an ocean trench is often formed. The subducted plate eventually melts and is recycled into the mantle, creating a convection current.

The geographic feature associated with an ocean plate going under a continental plate is a subduction zone.

A subduction zone is an area where two tectonic plates meet and one, typically the denser oceanic plate, is forced beneath the other, forming an ocean trench. This is a result of the motion of the Earth's tectonic plates. A perfect example of this is the deep Japan trench along the coast of Asia.

Over time as the subducted plate is exposed to high temperature and pressure, its material melts and is recycled into the mantle, which causes a downward-flowing convection current, balancing the material that rises at rift zones.

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Major change occurs during the metamorphism of limestone to marble that Clays crystallize to micas, forming a highly foliated, mica-rich rock. Thus, option D is correct.

Marble is created when limestone is exposed to high pressure and temperature. The calcite crystals in limestone combine and increase in size to create massive assemblages while maintaining their original makeup. Marble is the end product of the recrystallization of limestone.

Marble is a metamorphic rock that results from the heating and pressing of limestone. As interlocking grains expand, the calcite in the limestone changes and fossils and layers in the original limestone vanish. White marble is created from pure limestone.

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Answer:

Option D is correct.

Explanation:

Saturn's rings are formed by thousands of ice blocks which vary in size from microscopic to as big as a car.

The particles spinning around the planet have a constant orbital velocity that continuously pushes them out to space, but Saturn's strong gravitational force pulls them towards the planet keeping the rings in line as it has done for approximately 100 million years, and will continue to do so for another 300 million years.

If by chance a particle changes its orbital angle, the gravity pull will be too strong for the particle to escape and will slowly correct its orbit over time.

Answer:

Option A is correct.

Explanation:

This word literally means publicity. It was a policy promoted by the Soviet leader Mikhail Gorbachev. It allowed more transparency from the government, and greater freedom for people to discuss and criticize the government, it also allowed greater freedom for the press, and other media to speak freely about their opinions on the USSR.

Its main purpose was to incentivize the people to get more involved in politics without fear of retaliation and seek solutions to common problems in the country.

Final answer:

The policy introduced by Gorbachev in 1985 that promoted openness in government and society is called glasnost. This policy, alongside perestroika, was aimed at modernizing the Soviet system but eventually contributed to its downfall and the end of the Cold War.

Explanation:

In 1985, an official policy introduced by Mikhail Gorbachev aimed at increasing transparency and open discussion in government and society was known as glasnost. This policy emphasized open government, increased access to information, and encouraged conversation about the country's social issues. Along with perestroika, a restructuring of the economy, glasnost was part of a series of reformative measures put into place to modernize the Soviet Union and alleviate economic and political tension. The policy of glasnost allowed for a more honest discussion and criticism of the Soviet government, which was a significant shift from the previously rigid and secretive operations of the state.

These reforms, however, ultimately led to the disintegration of the Soviet Union. Calls for independence from Soviet republics grew louder, and the traditional hold of the Communist Party began to weaken, culminating in an attempted coup and the eventual dissolution of the Soviet Union in 1991, thus bringing the Cold War to an end.

Answer:

Water Quality

Explanation:

The Fracking method will pollute the water quality.

Answer:

An elliptical galaxy.

Explanation:

Elliptical galaxies are one of the 3 classes of galaxies existing throughout the universe.

Unlike spiral galaxies (such as our Milky Way), that have a distinctive spiral form, elliptic galaxies don't have any pattern or form visible from a regular telescope. To the eye, they look like a lot of small stars really close to each other, orbiting an even bigger star.

However, they are far more complex than it seems. These galaxies are almost as old as the universe itself. The time for them to form new stars have passed, due to the lack of interstellar gas or dust, which is now depleted.

Due to its age, an elliptical galaxy is home of really old stars, that have been around for billions of years, and remain as a relic of the galaxy's violent past.

Answer:

Option (C)

Explanation:

A barrier island is usually defined as a long and narrow type of land that is dominantly comprised of sand particles and are oriented parallel to the coastal mainland.

The presence of a barrier island protects the coastal rocks from getting eroded by the strong water waves, wind, and tidal effects. This acts as a barrier and there lies a lagoon between the coastal landform and the barrier island.

It plays an important role in the ecosystem as it provides valuable nutrients and minerals, supporting a large number of living species.

Thus, the correct answer is option (C).

Each term matches to a specific layer of Earth's interior: the lithosphere is the layer between the crust and the asthenosphere, the asthenosphere is the semi-solid layer beneath the lithosphere, the crust is Earth's outermost layer, the lower mantle surrounds the inner core, the upper mantle is between the asthenosphere and lower mantle, the outer core is the liquid layer responsible for Earth's magnetic field, and the inner core is the solid metallic center.

The correct matches for each term to its description based on the structure of Earth's interior are as follows:

Note: The lithosphere is composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid, while the asthenosphere is the partially molten upper mantle material below it. The inner core is the dense, solid center of the Earth, and the outer core is the liquid layer that surrounds the inner core and is responsible for the Earth's magnetic field. The crust is the thin, outer surface layer, and the mantle is divided into the upper and lower mantle, based on depth.

Answer:

The Mexican Pacific.

Explanation:

The west coast of Mexico borders the Pacific Ocean in its entirety and helps give Mexico one of the longest coastlines in the world.

Climates range from Mediterranean in the north to semi-arid, desert, tropical savannah, and finally tropical rainforest in the south.

Important cities on on the west coast are Ensenada, La Paz, Mazatlán, Puerto Vallarta Acapulco, and Manzanillo.

Most of the coastal area is seismically active due to a nearby plate boundary and thus experiences intermittent earthquakes.

Several of the most important states bordering the Pacific are Baja California, Baja California del Sur, Sinaloa, Nayarit, Jalisco, Guerrero, Oaxaca and Chiapas.  

Answer:

the answer is E

Explanation:

Answer:

Temperate Zones are the aeas of earth amid the high and low latitudes aka moist or mid-latitude climates, those are the areas between the tropic and the polar areas, which generally have 4 seasons; in those areas weathering by frost wedging is likely more effective; rocks experience small cracks aka joints due the cycle of water in extreme climates.

Answer:

The answer is letter B

Explanation:

the release of fly ash into the atmosphere. Because pollution control standards now require that it be captured prior to release by fitting pollution control equipment.

Answer:

Photosynthetic organisms was the reason of these atmospheric changes.

Explanation:

The plant which is discovered by the scientists that is apparently devoid of life but has ice caps located at the poles which reveals that planet's atmospheric O₂ levels sharply increased about 1,000,000 years ago was due to evolution of photosynthetic organisms like cyanobacteria etc which went extinct and then O₂ levels dropped quickly 50,000 years ago. So photosynthetic organisms was the reason of these atmospheric changes.

Answer:

The answer is 7 miles or 11 km, by driving.

In a private jet 6 miles or 10 km, flight time 31 minutes.

Explanation:

If we have a nice traffic, It is 7 miles or 11 km. Driving time is 15 minutes.

In a private jet 6 miles or 10 km, flight time 31 minutes. Because of the curvature of the Earth, the shortest distance is actually the great circle. The straight line flight distance is 1 mile less than driving on roads, which means the driving distance is roughly 1.1 x of the flight distance.

Answer:

B. a volcanic mudflow that resembles fluid concrete.

Explanation:

Lahar -

Lahar is a form of debris or mud , basically made up of water , rocky debris and slurry .

Lahar are very devastating in nature as it flows out from the volcano along the river .

The characterstics of Lahar is , it is very large , and dense and viscous in nature .

One of the example if Lahar is ,

The Osceola Lahar , originated from the volcano of Mount Rainer in United states , specifically in the aresa of Washington , it covered the area of about 330 square kilometres , with a volume of about 2.3 cubic kilometres .

Answer:

The presence of Liquid metallic hydrogen.

Explanation:

Jupiter is primarily made of this material.

This is a phase of hydrogen where the material behaves like an electrical conductor, it happens due to the high temperature and pressure that take place in Jupiter's hostile environment.

This form of Hydrogen is not present anywhere on our planet.

Answer:

This is an example of a: negative feedback loop.

Explanation:

The Earth's climate system is in dynamic balance. It is therefore continuously adjusting to forced disturbances, and as a result, the climate is altered. A change in any part of the climate system, initiated by internal or external forcing mechanisms, will have a much wider consequence. As the effect cascades through the associated components in the climate system, it is amplified. This is known as feedback.

As an effect is transferred from one sub-component of the system to another, it will be modified in character or scale. In some cases the initial effect may be amplified (positive feedback), while in others negative feedback may be reduced).

An example of a positive feedback mechanism involves water vapor. A warmer atmosphere will potentially increase the amount of water vapor in it. Since water vapor is a greenhouse gas, more energy will be trapped that will increase the atmospheric temperature even more. This in turn produces more water vapor, establishing a positive feedback.

Answer: True

Explanation: the theory of the island biogeography equilibrium modem describes that species have to get to a certain island from somewhere else which is the immigration part and other species have to migrate from the island as they run out of resources which is the extinction part. This theory shows that as the number of immigration increases and a new place is colonized the rate of extinction of species increases because there is more competition and limited resources for these species and vice versa.

Final answer:

Sea-level changes are cyclic, consisting of episodes of transgression and regression so the correct option is B.

Explanation:

Sea-level changes are cyclic, consisting of episodes of transgression and regression. This means that sea level rises and falls over time. During transgression, as sea level rises, sediment deposition moves towards the coastline, resulting in onlapping. On the other hand, during regression, as sea level falls, sediment deposition moves away from the coastline, resulting in offlapping. These patterns can be observed in sediment cores taken from different locations.

Eustatic sea-level changes refer to global changes in sea level due to changes in the volume of water in the oceans versus ice sheets. These changes affect the sea level on a worldwide scale, rather than just a local area.

Based on the changes in fossils over a while, scientists can determine whether the sea level was rising, falling, or constant. For example, if the fossils found in a specific sediment layer indicate marine organisms that live in shallow waters, it suggests that the sea level was rising during that time period, as the shallow-water environment moved landward. Conversely, if the fossils indicate marine organisms that live in deeper waters, it suggests that sea level was falling during that time period, as the deeper-water environment moved seaward.