Describe two mechanisms by which mantle rock can melt without an increase in temperature

Answers

Answer 1
Mantle rock can melt without an increase in temperature if there is a decrease in pressure exerted by overlaying rock layers. This is called decompression melting. Rocks can also melt in the mantle due to dehydration. A subducting slab carries with it water as it is pulled into the mantle. The gradual release of the water contained in the slab is the mechanism that causes melting. 
Answer 2
Final answer:

Mantle rock can melt without an increase in temperature through decompression melting and volatiles-induced melting.

Explanation:

Mantle rock can melt without an increase in temperature through two mechanisms:

Decompression melting: This occurs when mantle rock rises to shallower depths where the pressure is lower. As the pressure decreases, the rock can undergo partial melting, similar to how a can of soda can release bubbles when opened. The decrease in pressure allows the rock to reach its new melting point, even without an increase in temperature.Volatiles-induced melting: Rocks in the mantle contain small amounts of volatile substances like water, carbon dioxide, and sulfur. When these rocks are subjected to high temperatures and pressures, these volatiles can be released from the rock, which creates a chemical change that lowers the melting point of the surrounding rock, causing it to melt.

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Related Questions

explain the significance of clear-cutting, acid rain, smog, and eutrophication

Answers

CLEAR-CUTTING: CLEAR CUTTING IS THE REMOVAL OF ALL TREES IN ONE OPERATION FOR HARVESTNG PURPOSE. IT IS ECONOMICALLY PROFITABLE METHOD OF LOGGING. IT GIVES SIDE EFFECTS SUCH AS LOSS OF TOP SOIL. ACID RAIN : IT IS CAUSED BY EMISSIONS OF SULFUR-DI-OXIDE AND NITROGEN OXIDE WHICH REACT WITH WATER MOLECULES IN THE ATMOSPHERE TO PRODUCE ACIDS. SIGNIFICANCE OF ACID RAIN IS SENSITIVITY OF AGRICULTURAL LAND TO LONG-TERM ACID PRECIPITATION. SMOG : IT IS A MIXTURE OF SOLID AND LIQUID FOG. IT IS ALSO CALLED PHOTO CHEMICAL SMOG. FOG POLLUTED WITH SMOKE AND PARTICULATES ESPECIALLY FROM BURNING COAL. EUTROPHICATION : SEWAGE AND WASTE WATERS FROM INDUSTRIES AND AGRICULTURE ARE RICH IN ORGANIC AND INORGANIC NUTRIENTS CONTAINING PHOSPHOROUS AND NITROGEN TO SOME EXTENT.

Why have Ukrainians sometimes called their country “Little Russia”?

Answers

because, russia invaded and made ukrain as a colony

Answer:

Second largest country on the European continent, behind only Russia, Ukraine, whose name in the Slavic language means "Border", is limited to the south with Moldova, southwest with Romania, Hungary and Slovakia, west with Poland, to the northwest with Belarus, to the northeast with Russia, and to the south to the south by the Black Sea.

Ukraine was one of the main countries of the extinct Union of Soviet Socialist Republics (USSR). That's why it is and is still known today as "Little Russia". In 1920, its territory was controlled by the communists who, taking advantage of the fertility of the Ukrainian soil (“black earth”), developed large cereal plantations. National independence was proclaimed on July 16, 1990, and was approved on August 24 of the same year. Since then, the nation has joined the Commonwealth of Independent States (CIS) - a group formed by Russia and the former Soviet republics.

What tectonic setting is interpreted to be the cause of volcanism at yellowstone?

Answers

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Final answer:

The cause of volcanism at Yellowstone is attributed to the movement and melting of a hotspot, or an exceptionally hot part of the Earth's mantle. This hotspot has led to a long history of volcanism in the Yellowstone area, fueling the park's famous geysers, hot springs, and other geothermal features.

Explanation:

The cause of volcanism at Yellowstone is interpreted to be the movement and melting of a hot mantle plume, or hotspot, which is a unique tectonic setting in the Earth's lithosphere. A hotspot is an exceptionally hot part of the Earth's mantle that rises towards the surface, causing a high heat flow and volcanic activity, even in the absence of a tectonic boundary. This hotspot is largely stationary while the Earth's tectonic plates move over it.

Just like the Crater Lake example, where a volcano erupted and caused the formation of a caldera, a similar but much larger event happened at Yellowstone. Around 640,000 years ago, a massive eruption occurred, causing a large part of the Earth's crust above the hotspot to collapse, creating the Yellowstone Caldera which is still visible today.

The continuous movement of the North American Plate over the hotspot has resulted in a prolonged history of volcanism in the Yellowstone area, which is part of a chain of volcanic features that stretch across Idaho. The heat generated by this movement fuels the park's famed geysers, hot springs, and other geothermal features.

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A subcontinent is __________.
A.
a large landmass that is part of a continent
B.
a large area of land that is below sea level
C.
a large island, such as Greenland or Iceland
D.
a large region with similar landforms and weather

Answers

It is A.  Think of India. It is a subcontinent due to its size but is part of the Asian continent.

Answer:

A.)

Explanation:

Approximately how much energy is lost in each transfer from one tropic level to another?
-
A. 10 Percent
-
B. 50 Percent
-
C. 90 Percent
-
D. 25 Percent
-
Subject is in Science.

Answers

10 percent.

Please vote my answer brainliest. thanks!

Answer: 10 percent

don't ask I just know

Vanessa has 3 yards of cotton. She needs 3/4 yard for each skirt she makes. How many skirts can she make?

Answers

Final answer:

Vanessa can make 4 skirts from 3 yards of cotton by dividing the total yards of fabric by the yards required for one skirt, which is 3/4 yard.

Explanation:

To determine how many skirts Vanessa can make with 3 yards of cotton, we need to divide the total amount of fabric she has by the amount of fabric needed for one skirt. Vanessa requires 3/4 yard of cotton to make one skirt. Therefore, we divide 3 yards by 3/4 yard to find the number of skirts she can make:

3 yards ÷ (3/4) yard = 3 ÷ (3/4) = 3 × (4/3) = 4

This calculation indicates that Vanessa can make 4 skirts with 3 yards of cotton, assuming there's no waste or fabric needed for additional components or hemming.

Environmental protection efforts in Eastern Europe are hindered by _____.

economic development
enforcement
foreign investment
the European Union
(More than one answer) thanks for your help :)

Answers

enforcement and economic development. 

no problem and best of luck,

Carbono Konopia :)


Answer:

economic development

Explanation:

The analysis shows that European policies have faced many environmental challenges over the years. However, it also reveals that they continue to undermine the natural systems that underpin European economic prosperity. While living within the confines of our planet is a challenge, meeting it will bring enormous benefits. Making full use of Europe's innovative capacity could make them truly sustainable and put us at the frontier of science and technology, creating new industries and a healthier society.

In Candomblé, orixás are __________.

Answers

it's B. lesser deities with individual personalities who serve the all-powerful god Olodumare

Options:

A. rituals performed to honor the gods

B. lesser deities with individual personalities who serve the all-powerful god Olodumare

C. priests and priestesses who preside over rituals

D. dancers whose bodies gods use to communicate with other humans

Answer:

B. lesser deities with individual personalities who serve the all-powerful god Olodumare

Explanation:

    Orixás are elements of nature, and each Orixá represents a force of nature. When someone worship the Orixás, they also worship the elemental forces from water, earth, air, fire, etc.

    Therefore, when it is said that one worships Gods, he refers to worshiping the forces of nature, forces that belong to the creation of the great Father, the Father known to humans as "Olorum" (Supreme God).

Which Geographic feature affects the climate of California's Central Valley?

A. Gulf Stream

B. Rain Shadow

C. Westerlies

D. Wet/Dry Season

Answers

wet or dry seasons affects the climate of california's central valley because in the north there is a hot mediterranean climate and the southerly parts of the region are dry and categorized as desert.

hope this helped, God bless!

The climate of California's central valley is affected by wet or dry seasons . The appropriate response is Option D.

What is Wet/Dry Season?

The dry season is a yearly period with little rain, particularly in the tropics. The tropical rain belt dominates the weather in the tropics, moving from the northern to the southern tropics and back throughout the year.

The tropics are characterized by tropical wet and dry climates. The tropics are two lines of latitude located approximately 23.5 degrees north and 23.5 degrees south of the Equator. The land in this area receives direct sunlight for the majority of the year. Tropical Wet and Dry is famous for having two seasons. There are two seasons: wet and dry.

The dry season is usually longer. Plant and animal life struggle to adapt to the dry conditions during the dry seasons, but as the rainy season begins, plants turn green, ponds fill up, and animal life flourishes. Wind and ocean currents change cause this climate.

The climate of California's central valley is affected by wet or dry seasons because the climate in the north is hot Mediterranean, and the climate in the south is dry and desert-like.

The appropriate response is option D.

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Which statement is true? A. A biconditional is only true if both statements are true. B. A biconditional is only true if both statements have the same truth value. C. A biconditional is only true if the hypothesis is true. D. A biconditional is only true if the hypothesis is false. Please select the best answer from the choices provided A B C D

Answers

I believe the answer is B.

Hope this helps!

Biconditional statements are written with "if and only if." So one statement is true "if and only if" the other statement is true. Your answer is A. 

How did the Land Ordinance of 1785 affect westward expansion?

A. Settlers occupied more of the territory east of the Mississippi.

B. Settlers had to live along the Mississippi River.

C. Settlers had to follow the Oregon Trail to reach their new lands.

D. Settlers built homesteads west of the Mississippi River.

Answers

c. settlers had to follow the  Oregon  Trail to reach their new lands.

All tho some volcanoes are massive, They do not impact global weather. True or false

Answers

False. They affect global weather, through ashes and well, earthquakes
True is the answer to you're question.

what important details can a population pyramid show

Answers

A graphical illustration that show the distribution of various age groups in a population (in internet)

If the scale of a map is 1cm to 525m, how many (cm) on the map will represent a 4mile stretch of road. [Hint: unit conversion very necessary]

Answers

1 Mile = 160 934.4 Centimeters
4 miles= 4x160 934.4 = 643737.6 cm

1 cm of the map corresponds to 525cm on the real road
1 cm = 525
x cm= 643737.6

x= 643737.6/525
x= 1226.17

4 miles would correspond to 1226.17 centimeters on the map

Which geographical land form describes Mexico and Central America?

A. Cordillera

B. Isthmus

C. Peninsula

D. Headland

Answers

The answer may be B, but i may be incorrect.

The answer is b ik this bc i took the test

what is an example of a primary consumer
A. Wolf
B. Mouse
C. Vulture
D. Alga
(Subject is in Science)

Answers

Primary consumers are generally vegetarians who consume plants for energy and is preyed upon frequently. This helps get energy from plants into carnivores indirectly. The answer is B, because A is an apex predator, C is a scavenger, and D is a decomposer.
Final answer:

The correct example of a primary consumer from the given options is the Mouse, which eats plants and seeds. Wolves and Vultures are secondary or tertiary consumers, while algae are considered producers.

Explanation:

In an ecosystem, a primary consumer is an organism that eats producers. Producers are organisms that make their own food through photosynthesis, such as plants or algae. Primary consumers are often herbivores, meaning they only eat plants.

From the given options, the correct example of a primary consumer would be B. Mouse. Mice are primary consumers because they consume plants, seeds, and vegetables as their source of food and energy.

A Wolf is an example of a secondary or tertiary consumer since it feeds on other animals. The Vulture is another example of a tertiary consumer or scavenger as it eats the carcasses of dead animals. Algae is considered a producer as it synthesizes its own food using sunlight, through photosynthesis.

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Why was it important to examine both the color and the streak of your minerals

Answers

Examining both the color and the streak of minerals allows for more precise identification. Some minerals may have the same coloring however, minerals have distinct streaking colors.

describe some of the main issues that involve our environment, and provide example of how these issues affect our environment

Answers

Boy this is one of my strong points!
The president wanting to try to bring coal back even though the industry it self has already been gone for a long time. The environment suffered through these times due to the amounts of Air,and land pollution. The toxins and chemicals released when coal would burn would released huge amounts of Carbon Dioxide (CO2). The larger amounts of coal being released the more our atmosphere suffers!

Which are reasons that geographers study religion? to reduce the spread of pandemics by restricting religious diffusion to explain religion's role in regional conflict to prevent countermigration streams to understand how religion affects land use

Answers

The answer is to explain religion's role in regional conflict.

Answer:

(to understand how religion affects land use) and (to explain religion's role in regional conflict)

Explanation:

because my quiz says so...

which characteristic of major metropolises is shared by new Orleans, new york, chicago, and atlanta

Answers

All of these major cities are by the ocean for trade and are typically in between other small towns and cities, this provides tourism and attraction from other countries.
Final answer:

The characteristic shared by New Orleans, New York, Chicago, and Atlanta is urbanization. This includes economic significance, housing large populations, and facing typical urban challenges like congestion, pollution, and crime. Each city's evolution has necessitated infrastructural developments and led to urban issues.

Explanation:

The characteristic of major metropolises shared by New Orleans, New York, Chicago, and Atlanta is their urbanization features. These include being major economic centers, housing a large, diverse population, and experiencing the typical challenges of urban life. All four cities have evolved over time as a result of industrialization and the increase in population density, which brought about challenges such as congestion, pollution, and crime.

For instance, New Orleans has experienced demographic changes and functioned as a major trade center in the 19th century. New York and Chicago, on the other hand, became vital centers for multimodal transportation, housing corporations, and job opportunities. Atlanta, as a global city, has become a hub for multinational corporations and exercises significant international political influence.

Consequently, the progression of these cities into major metropolises brought about the creation of infrastructure to support these changes such as electric lighting, advanced communication methods, improved intra-city transportation, and construction of skyscrapers. However, these changes also introduced common challenges of urban life including overcrowding, pollution, and increased crime rates.

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when subtracting 9.3 from a certain number, the result is 68.91, as seen below. What number should go in the box to complete the subtraction problem
7 .21
- 9.3
68.91

Answers

To answer this item, we let x be the number that is not unknown in this item such that the situation in this problem can be expressed as follows,

    x - 9.3 = 68.91

Adding 9.3 to both sides of the equation,
   x - 9.3 + 9.3 = 68.91 + 9.3

Simplifying,
   x = 78.21

The answer to this item is 78.21, this I think is the first choice except that it is mistakenly written as 7.21 only.

Answer:

7.21

Explanation:

Near the earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air.

Answers

78% would be nitrogen. 21% would be oxygen. 

Shelley saw a full moon in the night sky it looks like the picture below what can chili conclude

Answers

This question is incomplete. Here is the complete question:

Shelly saw a full moon in the night sky It looked like the picture below

What can Shelly conclude?

A.  The other side of the Moon is currently dark .

B.  The other side of the Moon is currently lit .

C.  The Moon will next enter the first quarter phase.

D. She will see a new moon in approximately one month.

Answer:

The correct answer is option A.  The other side of the Moon is currently dark .

Explanation:

Actually, there is no dark side of the moon, but there are areas that do not receive sunlight.

These dark areas are changing with respect to the moon phase we are watching from the earth.

Half of the moon will always be dark, but it will not always be the same half. For example when we are looking at a new moon, it means that the sun is illuminating the other half, which is not visible to us.

Therefore, if we find ourselves in the presence of a full moon, we can conclude that the other side of the moon will be completely dark.

Which term is also the "spruce-moose" biome that characterizes much of Canada?

Answers

The term that is used is "tiaga".
Tiaga is the russian name which is used for boreal forest and which is also called as "Spruce moose". The reason behind this is that characteristic animals of this biome also includes moose, that's why it is sometimes called spruce moose. This biome covers the area of province quebec of Canada.

Hebrew literature has given us many beautiful poems.

true
false

Answers

Obviously True*

Oh no! Something went wrong while adding your answer
It's too short. Write at least 20 characters to explain it well.
It is true because who beautiful they wrote it. And when u read it, the words where in rithem and description. People used it and made poems.


Hope that helped :)

name one developing country that has a population growth rate comparable to the industrialized worlds rates and explain how that country has accomplished this.

Answers

Uganda is a developing country that has a population growth rate comparable to the industrialized worlds rates.
The population in Uganda is expected to triple in the next four years. That's because even though Uganda has the 30th position in the highest death rate, it  the 2nd in the highest birth rates.
Uganda has 6.4 TFR due to lack of contraceptives and the majority of the population will experience AIDS which will eventually lead to the increase in the poverty as well as the spread of diseases.

The plant in the following photograph has several features that allow it to survive in cold, dry climates, including a low-growing stem that keeps it out of the wind. The stem is also covered in silky hairs that help trap in heat. image of a low-growing plant with hairy stems, leathery leaves, and red berries.
In which biome would you most likely find this plant?
a)chaparral

b)savanna

c)temperate forest

d)tundra

Answers

D)tundra. The hairs are specifically for trapping in heat, not for keeping cool in the summer. The stem is long specifically for the wind it experiences.

The correct answer is - d) tundra.

The tundra is a very harsh environment for the living organisms, plants included as well. The winds are strong and cold, most of the year is dominated by winter with thick ice all over the biome, poor soils, and temperatures that easily go to -40 and -50 C degrees.

In this kind of environment, the plants have evolved to be very short, often stuck to a rock or the ground itself. Their leafs are thick and very hard, covered with hairs, with the purpose of retaining heat, and protection from the extreme cold. Also these plants have a very long hibernation, so they are able to survive without any water or nutrients for much of the year, by putting themselves in non-active mode.

Tectonic plates can move in opposite but parallel directions along a fracture or fault at a boundary called a

Answers

that is called a transform fault boundary :)

100 ptsWhich characteristic of major metropolises is shared by new Orleans, new york, chicago, and atlanta

Answers

1) They are fairly built up
2) Many people live there
3) They are some of the largest cities in the US
4) They were some places in which, in the event of attack from the Soviet Union during the Cold War, were at the top of the lists

hope this helps
they are both widely populated cities and they have many businesses located in them

how did the events of the last 200 years lead to the development of urban geography, and what is its role today

Answers

Answer:

The relationship between industrialization and urbanization lies in the fact that it is the industrial process that dynamizes societies and acts to modernize them, although this is not the only factor responsible for this. Thus, the so-called attractive factors of cities are expanded, that is, the set of characteristics of the urban environment that attracts migrants from the countryside.

Moreover, among the effects of industrialization on urbanization are the transformation of the countryside and, by extension, the repulsive factors of the countryside, that is, the rural elements responsible for sending the rural population relatively forcefully to the cities. In this case, we can mention the mechanization of agricultural activities, which lead to the replacement of a large number of workers by machinery and the type of agrosystem adopted. This mechanization is intensified by the technical innovations produced by industrialization. Therefore, industrialization intensifies the urbanization of societies in order to promote the formation of the rural exodus, which is the mass migration of the population from the countryside to the cities, besides attracting this migration to the most industrialized areas, where there is more direct employment. and indirectly produced by industries.

It is worth remembering that it is not only the industrial activity itself that generates greater demographic attractiveness for cities, but the economic dynamics produced by it, which causes the emergence of greater opportunities in other branches of the economy, especially in the tertiary sector (commerce and services). Not coincidentally, the countries that have advanced the most in the process of industrialization and modernization of societies are those that most present a tertiary sector as the predominant composition in the production of wealth in their respective economies.

In addition to attracting greater demographic volume and intensifying urbanization, the effects of industrialization on cities can also be felt in the hierarchical composition of the territorial division of geographical space. In predominantly agrarian societies, the countryside has a preponderant relationship over cities, as they depend on the countryside for the generation of food, raw materials and capital movements. With industrialization, cities modernize and subordinate the countryside, which becomes dependent on the urban environment for the reception of machines, technological apparatus, skilled labor, scientific knowledge applied to production, among other elements.

Therefore, in summary, we can say that the effects of industrialization on urbanization are: intensification of city growth; population concentration; growth of the tertiary sector and the inversion of the subordination relationship between countryside and city. These aspects are general indicative and need to be appropriately adapted to the understanding of each occurrence throughout the world geographic space.

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