Which is the primary process involved in the formation of magma at a subduction boundary?

a) Water released by rocks plunging into the asthenosphere lowers melting temperatures.
b) A decrease in pressure lowers the melting temperatures of rock materials.
c) A plume of heated material rises from deep within the core.
d) Heat from the core melts the plates at subduction boundaries.

Answers

Answer 1

Answer:

a) Water released by rocks plunging into the asthenosphere lowers melting temperatures.

Explanation:

Subduction zone is a convergent plate margin in which a denser plates goes beneath a lighter one.

When lithospheric plates subducts, rock slabs goes into the subsurface and are subjected to intense heat and pressure as they pull further inside the earth.

The primary process which helps in the formation of magma in this zone is dewatering of rocks. When plates subducts, the conditions they are subjected to forces water and other fluids from them. As this water rises up to the crust, it causes reflux melting of nearby rocks. The water generally acts as a mobile phase for dissolution of ions and most importantly, it lowers the melting temperature significantly. When this occurs, the rocks melts and magma forms.


Related Questions

____can give clues about the cooling speeds of magmas, the presence of water beneath the surface or even the intensity of past contact metamorphism​

Answers

Textures and compositions of igneous and metamorphic rocks provide clues about magma cooling rates, presence of subsurface water, and contact metamorphism intensity. Contact metamorphism results in mineralogical changes in rocks due to heat transfer from cooling magma, which may also release water, altering surrounding rocks and forming valuable mineral deposits.

The textures and compositions of igneous and metamorphic rocks can provide important clues about the cooling speeds of magmas, the presence of water beneath the surface, and the intensity of past contact metamorphism. Fast cooling generally results in fine-grained rocks, while slow cooling allows for the growth of larger crystals. Moreover, the presence of certain minerals like chlorite and serpentine indicates hydrothermal processes, where the water plays a significant role in rock alteration. The presence of water beneath the surface, often from a cooling magma body, can also lead to significant hydrothermal activity and the deposition of valuable minerals, such as copper, zinc, silver, and gold, within rock fractures. Furthermore, the intensity of contact metamorphism, where existing rocks are altered by heat from a nearby body of magma, is typically greater when the cooling magma also releases water into the surrounding rocks.

Contact metamorphism occurs when a body of magma intrudes into cooler country rock, leading to temperature increases and consequent mineralogical and textural changes within the rock. The transfer of heat and potentially water from the cooling body of magma to surrounding rocks can lead to a zone of alteration known as a metamorphic aureole. The chemical composition of fluids, temperature, and the rate of passage of water through the rock all factor into the hydrothermal alteration and associated mineral deposits found in regions of contact metamorphism. Unique mineral assemblages can form depending on the levels of certain ions, particularly when magmatic fluids are involved.

The ring of heat is used to describe the area of seismic and volcanic activity along the pacific plate

True
False

Answers

THE ANSWER IS TRUE

okay it says i need more words

Answer:

False

Explanation:

The statement is incorrect. The term "Ring of Fire" is used to describe the area of seismic and volcanic activity along the Pacific Plate.

People who are opposed to increasing immigration levels state that immigrants:

A. are not supportive of the United States
B. overtax government health services
C. do not pay into any employment taxes
D. take jobs away from American citizens

(There are more than 1 answers)

Answers

Answer:

People who are opposed to increasing immigration levels state that immigrants take jobs away from American citizens, it is most populist and most frequent used argument

Explanation:

Answer:

The answers are A. Are not supportive of the United States and D. take jobs away from American citizens.

Explanation:Hope this helps

When farmers in Central America do NOT use pesticides on bananas, it generally results in taller banana trees and larger bananas.
True
False

Answers

Answer:

False

Explanation:

The farmers in Central America have been using pesticides extensively in the past several decades. While everyone would prefer that the bananas, as well as the other fruits, be all natural, organic, it is simply not practical and that type of production will result in deficit of the product on the market. The reason why the pesticides are used so much is so that the tree is not attacked by diseases and pests and the bananas to get destroyed.

The usage of pesticides actually contributes to the tree growing taller and being healthier, as the diseases and pests are mostly eliminated. The bananas themselves are too larger and in higher quantity, so the demand on the market is largely satisfied.

Answer:

False

Explanation:

In the figure, mDE = 118° and mBC = 48°. The diagram is not drawn to scale.


What is m∡A?
A. 83°
B. 70°
C. 35°
D. 24°

Answers

Answer:

a

Explanation:

Answer:

not C

Explanation:

which of the following is a system in which one leader controls the government, the economy, and the people​

Answers

Answer:

Dictatorial regime

Explanation:

Nowadays countries like Venezuela, North Korea, Cuba, and Russian have many related aspects of a dictatorial regime.

Best regards

Which of the following does not describe weather?

Temperature outside,
how windy it is outside, amount of clouds,
distance from the ocean

Answers

Answer:it’s rainy

Explanation:

Final answer:

The 'distance from the ocean' does not describe weather, which consists of elements like temperature, windiness, and cloud coverage, reflecting atmospheric conditions at a specific time and place.

Explanation:

The element that does not describe weather is 'distance from the ocean'. Weather involves atmospheric conditions such as temperature, windiness (how windy it is), and cloud coverage (amount of clouds). These aspects relate to the state of the atmosphere at a specific time and place. On the other hand, 'distance from the ocean' is more related to climate, which encompasses atmospheric conditions over a longer term and can influence the general weather patterns of a region due to factors like ocean currents and proximity to large bodies of water.

Therefore, when discussing the weather of a specific place at a specific time, mentioning the 'distance from the ocean' would not be relevant.

The Philippines are east of Vietnam.

True or False?

Answers

Answer:

true : )

Explanation:

The Philippines are east of Vietnam is the true statement. In the geographically Philippines are east of Vietnam.

What is Southeast Asia known for?

Southeast Asia is known as the popular destination, and it is one of the most visited by the tourist. Some part of the Southeast Asia has the tropical climate and in some part there are always warm. It is also rich in culture.

Thus, it is a true statement.

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please help me now....​

Answers

Answer: it is the rock formed within the rocks crust.

Explanation: Rocks formed from magma are called igneous rocks. Intrusive igneous rocks form when magma cools inside the Earth. Rocks that form from magma erupting onto the Earth's surface are called extrusive igneous rocks. Extrusive igneous rocks have little to no time to crystallize and, as a result, the crystals are very small or microscopic.

Rocks formed within the earth crust

Help guys, I don’t have any idea about it. Please help me. It’s urgent.
{Solid waste awareness}
(1) What influences our purchasing choices?
(2)Why is there so much waste?
(3)What are the major influences on your consumer habits?
(4)How can we change our purchasing habits to reduce solid waste?

Answers

1 ~ (I don't know)

2 ~ Because people litter a lot and just waste their things and don't use it usually. Which harms the environment. (The main sources for solid wastes are domestic, commercial, industrial, municipal, and agricultural wastes. The increase in the quantity of solid waste is due to overpopulation, affluence, and technological advancement.)

3 ~ (I don't know again T^T)

4 ~ Donate Clothes. ...Reduce Food Waste. ...Eat Healthy. ...Save Leftovers for Next Day. ...Buy Things With Less Packaging. ...Boycott Plastic Water Bottles. ...Just Don't Buy as Much Stuff….Really. ...Recycle.

That's all! :3 Hope this helps!~ (Sorry I couldn't help with 1 and 3. I Tried and I took a long time writing this.)

Volcanic eruptions and emissions from vegetation are the natural causes of which phenomenon? A. acid rain B. ozone layer depletion C. ozone layer hole D. global warming E. increase in sea levels

Answers

Acid Rain is the natural cause which causes volcanic eruptions and emissions from vegetation.

Explanation:

The volcanic eruption is a natural phenomenon that is caused due to the liberation of the lava from the heap of the earth along with the gases. The volcanic eruption results in causing major damages to the vegetation lying above the erupted crater of the volcano.  

This results in the immense release of gases such as “carbon dioxide, carbon monoxide, sulphur dioxide, hydrogen chloride, hydrogen fluoride, methane and ammonia” and these gases are major pollutants of the air. When these gases react with water vapour that are present in the atmosphere, they condense in the form of acid rain.

Answer:

The answer would be-

A. Acid Rain


PLEASE PLEASE HELP ME OUT........PLEASE​

Answers

I think it's D, end of summer

Because there are 2 equinoxes, 1 later in the spring and 1 around the middle of autumn. Which means I don't think it's A, B, or C. But it is around the end of summer. That's what I think the answer is. But, summer ends when autumn starts so... it could be B.

Hope this helps a little.

Which are examples of measurement units used for simple weather forecast

Answers

Answer:

C. Degrees Centigrade

D. Percentage of relative humidity

Explanation:

These are the two most common measurements (among the list of possible answers) to talk about weather  and weather forecast.

These two cover the basic needs of weather prediction and warning for people.  The degrees are given for sure, since that directly influences how you should dress to go out. Relative humidity is also given because when temperature is high, the humidity modifies the perception of the warmth.

You'll never hear the TV weather person talk about Roentgens or centimeters of mercury.

Answer:

Centimeters of mercury

Degrees centigrade

Percentages of relative humidity

Which statement about Vietnam, Laos, and Cambodia is not true?
a. All three countries were affected by the Vietnam War.
b. All three countries have a majority population belonging to the Khmer ethnic group.
c. All three countries were once part of French Indochina.
d. All three countries were under Japanese control in World War II.

Answers

Answer:

c.

Explanation:

a.vietnam and the three were allied with cambodia and laos

b.biggest armies on asean but not no.1 ,but,big population

d.they were after philippines conquered

Answer:

b. All three countries have a majority population belonging to the Khmer ethnic group.

Explanation:

During the colonial era, French Indochina was made up of the countries like Cochin-China, Annam, Cambodia, Tonkin, Kwangchowan, and Laos. These same regions are now divided into the nations of Vietnam, Laos, and Cambodia. On the other hand, Vietnam has a population of 1.5% of people belonging to the "Khmer ethnic group", 97% in Cambodia, and 4000 people belonging to the "Khmer" ethnic group Laos. In the Vietnam War, Vietnam was allied with Cambodia and Laos.

Circulation of both the atmosphere and the oceans is driven by what type of currents?

Answers

I'd say Divergent but it's been a while I'm not 100% sure

Convection current can be described as the Circulation of both the atmosphere and the oceans.

What is convection current?

This is the current that is known to occur in water bodies. This is as a result of thermal convection.

A very good example of this is when warm air is known to rise in a room towards the ceiling of the room.

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Cirrus, nimbostratus, stratus

Answers

Answer:

30) nimbostratus

31) stratus

32) cumulus

33) cirrus

What does the heat from the earths interior do to magama

Answers

Answer:

i found the answer on google

Explanation:

The high temperatures and pressure under Earth's crust keep magma in its fluid state.

I need help on this question.​

Answers

Raising livestock is technically for consuming purposes such as to get meat, milk, eggs, etc. This generates 4.5% of global greenhouse gas emissions. It also is one of the main causes of deforestation, biodiversity loss, and water pollution.

I’m not really sure :/

At a hydrothermal vent, ____.

A: Sea water seeps out the ocean floor through cracks in the crust

B: bacteria and other organisms die due to lack of nutrients

C: see water seeps into the ocean floor at the cracks in the crust

Answers

Answer:

The answer is A

Explanation:

A hydrothermal vent can be fond along underwater rifts or along plate tectonics and along their boundaries

The massive road system built in Brazil did not_____

Improve access by car or truck across the amazon region

Lead to the speed of disease to formerly isolated Indian tribes

Lead to a declining population along the coast

Cause deforestation of part of the amazon rain forest

Answers

the massive road system built in brazil did not lead to a declining population along the coast

Answer:lead to a declining population along the coast

Fourth choice

what type of variable started showing in the image above?​

Answers

im super sure thats...C....sorry if im wronh

Answer:

D. Cepheid Variable

Explanation:

RS Puppis is a Cepheid variable star, which varies in brightness, producing a light echo. A light echo occurs when light reflects off of surrounding objects, which delays its arrival to the observer.

I also took the test and got it right

please help me now...​

Answers

Carbon contains six (6) protons

Steep sided cone or composite volcano would most likely be found at

a) an oceanic hot-spot.
b) a subduction boundary.
c) a rift (divergent) boundary.
d) a continental hot-spot.

Answers

Answer:

b) a subduction boundary

Explanation:

The subduction boundaries, or convergent plate boundaries, are the places where the tectonic plates are colliding, and one of them subducts below the other. As one of the plates moves below the other, there's lot of pressure, and cracking occurring in the crust, so the magma manages to penetrate through it and comes out on the surface with ease. As it manages to get on the surface, it lifts up the land, and creates a cone shaped volcano. This volcanoes manage to make a very nice shape, the stereotypical volcano shape, and that is a result of constant pilling of material on the slopes of it. Some of the volcanoes that are regarded as the most beautiful are actually volcanoes of this type, like Mount Fuji in Japan for example.

According to the International Astronomical Union, which of the following is one of the criteria for an object to
classified as a Planet? Select all that apply.
the object must orbit the Earth
the object must be in orbit with objects that are larger in size and mass
the object must be large enough for gravity to shape it into a round ball
the object must have at least two moons

Answers

Answer:

I believe it's B and C?

Explanation:

It's def not A, and I don't believe D is true.  I'm not sure if both B and C are correct, but since it's all that apply I'm going to say they are.  Sorry, I'm never very good with astrology, you may want someone to double check me!  

Answer:

For an object to be specified as a planet, it must be large enough for gravity to shape it into a round ball.

Explanation:

Following are the criteria specified by the "International Astronomical Union" for an object to be recognized as a planet:

The object must "orbit a star". It must have sufficient mass to achieve hydrostatic equilibrium, which in association with gravity gives the object a roughly spherical shape. It must be the biggest and the heaviest object in its orbit capable enough of keeping the orbit clear for its own motion.

which enlightenment idea is reflected in the declaration of independence?

Answers

Final answer:

The Declaration of Independence reflects the Enlightenment principle of natural rights, as put forth by philosopher John Locke. It holds that all individuals have inherent rights including life, liberty, and the pursuit of happiness.

Explanation:

The Enlightenment idea that is distinctly reflected in the Declaration of Independence is the concept of natural rights, as conceived by the philosopher John Locke. This philosophical principle stipulates that all individuals inherently possess rights such as life, liberty, and the pursuit of happiness, and these cannot be denied by any ruler. The preamble of the Declaration of Independence encapsulates this principle: "We hold these Truths to be self-evident, that all Men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, and the pursuit of Happiness — That to secure these Rights, Governments are instituted among Men, deriving their just Powers." This statement asserts the inalienability of these rights and that governments are instituted for the specific purpose of safeguarding them.

This notion was a cornerstone of the disagreement between the British colonists and the Crown, paving the way for the declaration of American independence in 1776. Drafted primarily by Thomas Jefferson, the Declaration not only proclaimed separation from Britain but also eloquently outlined the reasons for rebellion, chiefly revolving around the violation of the natural rights of the colonists by the British rule.

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How do large bodies of water influence climate?

Downwind areas have cooler summers than inland areas have.

Downwind areas have warmer summers than inland areas have.

Downwind areas have harsher winters than inland areas have.

Downwind areas have cooler winters than inland areas have.

Answers

i believe it’s B, down wind Areas have warmer summers than in land areas have

Answer:

The correct answer is B) Downward areas have warmer summers than inland areas have. (gradpiont)

Explanation:

Which of the following processes is thought to be partially responsible for the Little Ice Age in Europe?

A. Changes in centrifugal force
B. Changes in the Coriolis effect
C. Changes in thermohaline circulation
D. Changes in tidal patterns

Answers

Answer:

The answer is C

Explanation:

The currents flowing through the ocean, a process called Thermohaline circulation, can have an impact on climate. Thermohaline circulation (THC) is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes.

If incorrect please tell me.

Answer:

"Changes in thermohaline circulation" is thought to be partially responsible for the "Little Ice Age in Europe".

Explanation:

Though the exact cause of the "little ice age in Europe" has not come into the light, the changes in thermohaline circulation is still cited as one of the most significant reasons behind the little ice age. According to experts, the slowing down of thermohaline circulation resulted in sudden and grieve temperature drops, making it appear like a little ice age that lasted for about "500 years".

What is the central point of Wiesel's Nobel Prize acceptance speech?

A. Countries should be allowed to Deal with problems in their own way

B. The Holocaust was a honorific time in the history if the Jews.

C. Prejudice and inequality are a part of human nature.

D. The world should not stand by and allow injustices to occur

20 Points Per an Answer
Please answer correctly and don't waist any slots for an answer

Answers

D. The world should not stand by and allow injustices to occur

Hope this helps chu

Have a great day

☆ Dont forget to mark brainliest ☆

Final answer:

The central point of Elie Wiesel's Nobel Prize acceptance speech is that the world should not stand by and allow injustices to occur. Wiesel emphasizes the importance of human rights and the responsibility of humanity to prevent atrocities like the Holocaust from happening again.

Explanation:

The central point of Elie Wiesel's Nobel Prize acceptance speech is that the world should not stand by and allow injustices to occur. Wiesel emphasizes the importance of human rights and the responsibility of humanity to prevent atrocities like the Holocaust from happening again. He urges people to take action and fight against prejudice, hatred, and indifference.

why does south america have several cultures?​

Answers

Answer:

I believe because some prats of south amsica where conceyed by different people Spain and proutugul and because of the different tribes of native poeple

Explanation:

Answer:

The geographical vastness of the South American continent, a diverse climatic pattern, presence of explicitly distinctive landforms from deserts to rainforests and from grasslands to mountains, difference in the levels of development, etc. are the main factors responsible for the existence of several cultures in South America.

Explanation:

The South American continent is home to twelve small and large sovereign countries. Each country has a culture of itself having no or a partial resemblance with the other. These cultures are mainly governed by regional geography.

“Match the zones ant their characteristics” please help

Answers

Answer: Horse latitudes connect your polar and ferrel cell

Explanation:

The horse latitudes are subtropical regions known for calm winds and little precipitation. The horse latitudes are regions located at about 30 degrees north and south of the equator. These latitudes are characterized by calm winds and little precipitation. Roughly it says tho so there is that.

Final answer:

Climate zones, consistent with geography and earth science topics, include Polar, Temperate, and Tropical zones. Polar zones are cold and harsh, Temperate zones offer moderate temperatures with distinct seasons, and Tropical zones are consistently warm, each having unique weather patterns, vegetation, and wildlife.

Explanation:

The question appears to be about zones and their characteristics, which could refer to many different types of zones. However, given the context, I will assume that we're talking about the climate zones. This subject is commonly taught in geography or earth science classes.

There are typically three main climate zones: Polar, Temperate, and Tropical.

The polar zone is characterized by very cold and harsh conditions. This zone is situated in the polar circles.The temperate zone has moderate temperatures and distinct seasonal changes. It exists between the polar and tropical zones.Tropical zone is warm throughout the year and is located around the equator.

Each of these zones has unique weather patterns and types of vegetation and wildlife.

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The function of marketing that tells customers where they can buy the product and how the product gets there is calledpromotionprocessplacephysical Hou has set a goal to bake 150 cookies for a fundraiser. So far he hasbe baked 22 cookies. Hou averages about16 cookies every half hour. Write anequation or inequality to represent thissituation. Please help if you can, I'd really appreciate it.1. A plane intersects one nappe of a double-napped cone such that it is perpendicular to the vertical axis of the cone.Which conic section is formed?2. A plane intersects only one nappe of a double-napped cone such that it is parallel to the generating line and it does not contain the vertex of the cone.Which conic section is formed?3. Which intersection forms a parabola?4. Which conic section results from the intersection of the plane and the double-napped cone where the plane is parallel to the generating line?5. A plane intersects a double-napped cone such that the plane contains the generating line.Which terms describe the degenerate conic section that is formed?Select each correct answer. I need help with these 3 questions (attachment) You go to the wholesale club and buy a large bag of 12 smaller chip bags at $10.50. At your local store, the individual chip bags cost 0.99/bag. How much do you save per dozen bags by buying in bulk? Divide the sum of 8 and 12 by 4 What percent of the universe is dark matter? Right Answer PleaseLee la frase y escoge la opcin correcta para terminar la frase. Read the sentence and choose the correct option to complete the sentence.Angelina y Ariana ________ la tarea si nosotros ________ ms tiempo para explicarla.A. hacen, tendramosB. haran, tuviramosC. haran, tendranD. habran, tuvieran Joelle heard that vitamin K can strengthen her bones so she started taking megadoses of it daily. What negative effect could this have?A. get her banned from sports tournamentsB. lower her ability to absorb vitamins C and EC. poison her by building up too much vitamin K in her bodyD. cause hair loss and a severe case of acne Select the correct answer from each drop-down menu. The jurors, having finally reached regarding the verdict, sent for the bailiff. Sara had to take a second job to support her taste in clothing. At a maximum level of loudness, the power output of a 75 piece orchestra radiated as sound is 70.0 w. What is the intensity of these sound waves to a listener who is sitting 25.0 m from the orchestra? 35 POINTS HELPPPPP How has the population in Ghana changed from how it was thousands of years ago? It decreased because the ancient Africans used up northern Africa's resources. It decreased because less rainfall caused northern Africa to become a desert. It increased because farming methods improved and irrigation was introduced. It increased because the diseases that killed early Africans became treatable. I'm really stuck.a lot of these words seem the same. Can someone help me, please? Which is a social benefit of waiting to become a parent?more likely to have a social life that includes other parentsless likely to rely on parents and friends for social supportless likely to enjoy social activities that require going out more likely to be independent and need less social contact with friends Suppose you invest $2,400 into a regular savings account with 3.95% annual interest rate that compounds quarterly. What would your investment be worth in 10 years? a. $2,400 b. $2,647.80 c. $3,555.63 d. $11,303 Factorising and making m the subject of... Due to the small and highly electronegative nature of fluorine, the oxyacids of the this element are much less common and less stable than those of the other halogens. Bonding theory, however, does allow one to propose structures for these acids and use formal charges for the evaluation of these structures. For a molecule of fluorous acid, the atoms are arranged as HOFO. (Note: In this oxyacid, the placement of fluorine is an exception to the rule of putting the more electronegative atom in a terminal position.) What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed. Express your answers as charges separated by comma. For example, a positive one charge would be written as +1. Juveniles taken into custody have which of the following rights?A. the right to remain silentB. the right to request unruly status (I know that B is wrong already)C. the right to a trial by juryD. the right to speak to a judge when arrested (1,-7) with a slope of -5 as an equation What are the two procedures for ratifying and amending the US Constitution? (Select all that apply.) reviewing the amendment introducing legislation into Congress calling for an amendment convention the issuing of an executive order by the president