Answer:
Option (1)
Explanation:
Hotspots are the regions where the magma rises towards the surface due to the presence of large mantle plumes. The force exerted by the magma here is very high. When the lithospheric plates move over these regions, the magma comes out to the surface forming volcanoes. And as the plates move away from the region of hotspot they eventually cool. These hots spots are fixed at a place. There are numerous hotspots on earth. for example, the Hawaiin island chain, below which there are regions of hotspots.
Thus, the hotspot regions are not associated with the plate boundaries.
Hence, the correct answer is option (1).
Question 17 The Earth's average density is 5.5 g/cm" Yet the density of rocks at the surface are typically 2-4 g/cm". What does that tell you about what the density must be closer to the center of the Earth? you about what the density
Answer with explanation:
Since the density of the rocks at the surface of earth equals [tex]2-4gm/cm^{3}[/tex] which is much lesser than the average density of the earth equaling [tex]5.5gm/cm^{3}[/tex] thus we conclude the density of material closer is greater than [tex]5.5gm/cm^{3}[/tex].This can be mathematically shown as under:
[tex]\rho _{earth}=\frac{\rho _{surface}+\rho _{core}}{2}\\\\5.5gm/cm^{3}=\frac{(2-4)gm/cm^{3}+\rho _{core}}{2}\\\\\therefore \rho_{core}=[2\times 5.5-(2-4)]gm/cm^{3}\\\\\therefore \rho_{core}=(7-9)gm/cm^{3}[/tex]
Thus we conclude that the density of the matter closer to the center ranges between [tex]7-9gm/cm^{3}[/tex]
The density closer to the center of the Earth must be higher than the surface due to compression and the composition of concentric shells with increasing density.
Explanation:The average density of the Earth is 5.5 g/cm³, while the density of rocks at the surface is typically 2-4 g/cm³. This tells us that the density must be higher closer to the center of the Earth.
The Earth is not uniform and is composed of concentric shells with different densities. The density increases as we move closer to the center. The inner core of the Earth is the densest part, with a density of nearly 14 g/cm³.
The increase in density closer to the center is due to compression caused by the weight of overlying material.
Which of the following is true about radiation?
Question 35 options:
Radiation is always harmful to human health
Electromagnetic waves are measured in terms of their wavelength and color
Visible lights is the only electromagnetic energy from the Sun
Radiation is electromagnetic energy that is transmitted in the form of waves.
Answer:
Option (4)
Explanation:
The radiation are defined as the energy that is liberated from atoms in the form of electromagnetic waves or minute particles of matter. For example, the radiations that are emitted from the sun in the form of light.
This radiations are mainly of 3 types. This includes-
(a) Alpha Radiation- These are the short ranged particles and are very heavy. This radiations cannot penetrate the human skins but they can cause harmful diseases.
(b) Beta Radiation- These are also the short-ranged particles but they lighter. This radiations can penetrate the human skin upto the depth where the new skins are created.
(c) Gamma Radiation- These are highly dangerous and are penetrable to the human skin. This type of radiations are often used for the medical purposes.
Thus, the correct answer is option (4).
Answer:
gffffffffffffffffffffffffffd
Explanation:
fffffffffffffffffff
What is geology? Why is it important that everyone have a basic understanding of geology, even if they aren't going to become geologists?
Answer:
Geology refers to the study of the earth's physical and chemical processes, how they occurs and what are its effects. It explains how the earth has formed over millions of years. It also describes the internal structure of the earth and the study of the rocks and its minerals. It is a vast subject that is related to physics, chemistry, and biology.
The basic concept of geology must be known to all because earth undergoes various changes with time. Some of the events that occur at different places on earth are earthquakes, tsunamis, floods, hurricanes and so on and the conditions under which these processes occur must be known to all. It provides an idea of how to be away from such destructive processes.
Thus, geology is a very important subject and one must have basic knowledge about it.
Geology- a unifying theory gives us one broad explanation for a number of phenomena where, previously, we needed separate explanations. How does the plate Tectonics theory serve as a unifying theory?
Answer:
The plate tectonic theory is considered to be a unifying theory. According to this theory, the earth's crust is made up of numerous small and large pieces of lithospheric plates. These lithospheric plates are of 2 types, namely the continental crust and the oceanic crust. These plates continuously flows over the less dense layer of the asthenosphere due to the convection current that generates in the mantle. This current initiates because of the heat radiated from the interior of the earth. The main mechanism for the plate motion was determined later and this theory proved the continental drift theory that was not able to explain the main mechanism for the drifting of the plates.
This theory describes how the plates on earth were once all together and how they were separated with time, causing various changes and formed various types of landforms, shaping the earth's surface.
What types of telescopes are used for x-ray, gamma or microwave? Are those reflectors, refractors, or radio telescopes?
Answer:
Answered
Explanation:
X- rays , gamma or microwave are all electromagnetic waves. All the electromagnetic waves have different wavelength and frequencies.
X-ray and gamma rays are short wavelength whereas radio and micro waves have long wavelength. for short wavelength waves astronomers use optical telescope and for long wavelength waves radio telescopes are used.
Q2: The present-day topography of Arizona formed over a time interval that encompasses less than ____ percent of the entire geologic history of the state.
Answer:
Sixty percent
Explanation:
As Arizona is the sixth largest state in North America ranked after Mexico, the state has 113,998 square miles 295,000 km square. The landscape is rich with cactus plants. Located in Arizona is the great canyon a steep-sided gorge carved by the colorado river. The climate is primarily desert with mild winters and extremely hot summers. The southwest of Arizona has an abundance of mountains and plateaus besides this the state also has aridity of 27%. Colorado plateau covers 5,000 to 8,000 feet. In Arizona lies a transitional zone of Mogollon Rim, a cliff and a dramatic escarpment this terrane receives heavy rainfall due to the mountain ranges and temperature by latitudes. Arizona is home to four deserts like the Sonoran desert, Mojave desert, Painted desert, Chihuahuan desert.Answer these questions: (3 to 8 paragraphs for each question)
Assignment Instructions: Prepare a 4-10-page essay answering the questions below
6. What is dark energy? How much of the universe is thought to be dark energy?
Answer:
The dark energy is one of the primary composition of the universe, which is not visible and are mysterious. as a very little is known about this energy. This dark energy makes up nearly 68% of the universe. It is often considered as a property of space. The presence of dark energy can be detected as it affects the expansion of the universe. The universe started to form right after the big bang explosion and since then the space is expanding in all direction. With this, the dark energy present in the universe also is expanding at a considerably faster rate in association with the Cosmic Microwave Background (CMB) radiation. The measurements of the distance and their connection with the redshift provided an evidence that the universe has been expanding at a certain speed.
Which of the following is an example of something that could be predicted with information on a species’ "climate envelope"?
Group of answer choices
The reproductive rate of that species
The growth rate of the species
The survival rate of the species
The range that the species could potentially inhabit
Answer:
Option (4)
Explanation:
The ‘climate envelope model’ is defined as a part of a major dispersion model of species that uses the climate parameters in order to make a predictions of total space that a species occupies in an environment.
This models represents the areas of climate that are suitable for species (both plant and animals) to exist. The variables that are commonly used in the species distribution models are climate type, land cover area, topography of the area and some other variable that are related to the species distribution model.
Thus, it can be considered that this model describes the range that a species can inhabit.
Hence, the correct answer is option (4).
The majority of glaciers on planet earth are in either or regions
Answer:
Majority are on continental regions
Explanation:
Moat of glacial ice and ice caps are found in polar regions of the earth as they are home to permanent frosting and valley glaciers in the interior of the continents like in Asia, Africa, and other countries are not so much developed as they tend to stagnate or be limited due to the landmasses characteristics. Greenland and Antarctic glaciers together combine and makeup 99% of the freshwater reserves and ice on earth. As they were spread over a large surface of the earth the Antarctic glacier covers 25,400,000 km on the surface. These glaciers produce a thick mass of ice as compared to the valley glaciers which are unstable and have braided streams. Being characterized by retreating glaciers, and having an average mass of 4%.Briefly discuss three properties of minerals that are useful for identification.
Answer:
A mineral has certain characteristics that helps in distinguishing from one mineral to another. There are various properties that enables to identify these mineral. Three of the mineral properties for mineral identification are as follows-
(1) Color- It is one of the primary property. Minerals appears to be in different colors and these colors forms under different conditions. These colors ranges from dark to light colored. For example, the color of olivine is olive green in color.
(2) Luster- It is the property that describes how light is reflected from the crystal's surface. DIfferent minerals have different lusters. Lusters are of various types such as metallic, non metallic, dull, pearly and earthy luster. For example, pyrite has a metallic type of luster.
(3) Hardness- It is defined as the mineral's resistance to breaking. The hardness varies from mineral to mineral. According to the Mohr's hardness scale, the hardness of minerals ranges from 1 to 10. For example, diamond has a hardness of 10.
Why does hardness increase with shorter distances between the metal and the oxygen?
a.
The metallic bonding is optimal when the distances between the metal and the oxygen are the smallest.
b.
The electrostatic forces are the strongest when the metal and oxygen are closest together, making the compound harder.
c.
The chemical repulsion is the greatest when the metal and oxygen are closest to each other, making the compound harder.
d.
The magnetic attraction is the strongest when the metal and oxygen are closest together, making the compound harder.
Answer: Option (A)
The metallic bonding is optimal when the distances between the metal and the oxygen are the smallest.
Explanation:
Hardness increases with respect to shorter distances between the metal and the oxygen compounds, the reason for the increase in hardness is due to metallic bonding (electrostatic force between electrons and positive ions) which is optimal between them.
As the distance decreases, hardness increases and for increasing distances hardness decreases. So when the molecular weight is large, it has smaller valence or less charge on the metal which makes the bond weaker and less hard.
QUESTION 2 OF 3
Which river was completely within the boundaries of the Persian Empire, Alexander’s conquests, and Mauryan Empire?
A. Ganges
B. Krishna
C. Brahmaputra
D. Indus
Answer:
d. The Indus river was completely within the boundaries of the Persian Empire, Alexander's conquests, and Mauryan Empire
Explanation:
The Indus river is located in what it is Pakistan these days. It is the only river that was completely within the boundaries of the Persian Empire which include parts of current Pakistan, Alexander's conquests which included territories from Macedonia until parts of India, and also Mauryan Empire that included parts of current Pakistan up to some parts of current Bangladesh. The river Ganes, Krishna and Brahmaputra were part of the Mauryan Empire however, they are not included in the Persian Empire or of Alexander's conquests.
Question 18 Which moon in the table of moons should be the most rocky? Which one should be the most icy?
Answer:
Ganymede is the biggest and the most massive moon of the planet Jupiter. It has a metallic core. It moves in an orbital path around the planet Jupiter and orbits every 6-7 days. Half of the moon is comprised of silicate rocky materials and half of it is made up of water ice. Out of all the moons, Ganymede has the highest rock composition.
Europa is one of the moons of Jupiter. It is even smaller than the earth's natural satellite (moon). The core of this moon is made up of iron and nickel, along with some silicate materials but they are extremely in a lesser amount in comparison to the earth's core. Europa's surface is comprised of ice and water is present in a significant amount below the surface.
The symbolic nature of culture:
a-Facilitates cross-cultural communication, because all cultures use the same (or very similar) symbols to mean the same things.
b-Can create considerable misunderstanding between people from different cultures.
c-Is now known to be not as significant as anthropologists once believed.
d-Is easily discernable from the archaeological record.
Answer:
B
Explanation:
The symbolic nature of culture:
b-Can create considerable misunderstanding between people from different cultures.
Symbols can be a basis representation of different culture and it can be in the form of an object, word, color,sign,gesture or action. People can get considerable misunderstanding by different cultural symbolism because many symbols, though similar in appearance, can mean drastically different things.
1.Pointing with Thumb
Malaysia - Respectful
In Other culture- Meaningless
2.Calling with index finger
United States -Respectful
In Other culture -Offensive.
3.Thumb up
Iran-Obscene
in Others cultures- Goodluck
By these examples we conclude that symbols Can create considerable misunderstanding between people from different cultures.
A long time ago, sailors recognized the lack of wind in the ITCZ and dubbed the region the"doldrums". What other situations can you think of where sailors made discoveries that are now justified by modern science?
Answer:
"Doldrums" also called as he Horse latitude.
Explanation:
The equator is generally considered as the region of calm later on it was called the ITCZ. Now its called the doldrums as the belt of the equator which houses the Hadley cells. This is marked by the zero degrees latitude and this zone is the zone of mixing of atmospheric trade winds, earlier times sailors who came at this place along with their ships and horses but had to experience long-lasting high velocity prevailing winds at an altitude of 30, 40, 50, 60 degrees. So they named these winds on these altitudes as the forties, screaming sixties filtering fifties. These winds were so strong that their ships used to get drowned with horses in these latitudes. These were the discoveries made by the sailors.What are some of the environmental issues in Mexico that could contribute to poor health and economic problems? Can you explain ways you'd solve those issues also?
Answer and Explanation:
Some of the major factors for the environmental issues in mexico are:
1. Contamination of the environmental resources and the degradation of the level of oxygen as a result of the cutting down of forests and natural habitats loss.
2. Chemical contamination because of deceptive release of the material leaving the industrial facilities and exploitative dumping.
3. Increment in the population growth resulting from migration of people from other counties, lower Infant Mortality rates, better life expectancy of the residents as a result of good nutritional intake.
All these factors results in the increase in the basic needs of the people thus requiring more land and hence clearing of trees and land area.
Mexico should build the quantity of biosphere reserves and should center ecotourism for protection of its tendency.
Alongside this, they have to center populace control measures to be aware of population development. They should likewise turn out to be a piece of worldwide ecological projects that concentrates on the factors to safeguard our environment and should pay attention to the IPCC rules. They should join Convention on International Trade in Endangered Species (CITES) likewise and should stay up with the latest elements of the world. Aside from this, they ought to likewise do legitimate Environmental Impact Assessment before beginning of a formative undertaking.What are the principal sedimentary rocks? What is the genesis (origin) of each sedimentary rock type?
Answer:
The sedimentary rocks are those that are formed due to the compaction and lithification of sediments. Some of the examples are shale, mudstone, sandstone and limestone.
This sedimentary rocks are divided into 2 principle types. They are as follows-
(1) Clastic sedimentary rocks- This type of rocks are formed when the rock particles are weathered physically from the terrestrial rocks (source area) and are transported from one place to another by means of wind, water and ice. These rocks are named depending on the size of the sediment particles. Conglomerates and sandstone are examples of clastic sedimentary rocks.
(2) Chemical (Carbonate) sedimentary rocks- This type of sedimentary rocks are formed due to the precipitation of certain minerals from water. Due to this precipitation, the water releases the dissolved minerals. Some of them are also comprised of carbonate minerals that precipitates when reacts with water. In addition to that, some fragments of marine fossils are also found to be accumulated in this type of rocks. For example, rock salt, halite, dolomite, chert and limestone.
One of the reasons ______ environments tend to be warmer than _______ is that _______ surfaces tend to be covered with buildings and roads which have low albedo
Question 60 options:
urban, rural, urban
continental, rural, continental
rural, urban, rural
maritime, rural, urban
The correct answer is A. urban, rural, urban
Explanation:
In general terms, the temperature is related by multiple factors that include the altitude, latitude, weather, among others. Besides this, it has been found the temperature of the same geographical zone can vary depending on whether the zone is urban or rural. In this way, rural zones can be 1° to 3° grades hotter (even up to 7° grades) that urban zones, this can be explained as in urban zones surfaces are covered by roads, buildings or similar instead of trees, grass or lakes, and these type of artificial structures tend to absorb heat but not reflected which refers to the albedo. Thus, urban environments tend to be warmer than rural because urban surfaces have a low albedo.
Answer:
The correct answer is A. urban, rural, urban
Explanation:
In general terms, the temperature is related by multiple factors that include the altitude, latitude, weather, among others. Besides this, it has been found the temperature of the same geographical zone can vary depending on whether the zone is urban or rural. In this way, rural zones can be 1° to 3° grades hotter (even up to 7° grades) that urban zones, this can be explained as in urban zones surfaces are covered by roads, buildings or similar instead of trees, grass or lakes, and these type of artificial structures tend to absorb heat but not reflected which refers to the albedo. Thus, urban environments tend to be warmer than rural because urban surfaces have a low albedo.
Explanation:
A water quality standard recognized in British Columbia for Zn
in marine environments is 10 ?g/L. Convert this to (a) milligrams
per liter and (b) nanomoles per liter. Molecular weight of Zn:
63.38 g/mol.
Answer:
[tex](a)\ 10^4\ mg/L[/tex]
[tex](b)\ 10^{10}\ mg/L[/tex]
Explanation:
(a) As given in question,
concentration of zinc in atmosphere = 10 g/L
By converting g to mg,
1 g = 1000 mg
=> 10 g = 10 x 1000 mg
[tex]=\ 10^4\ mg[/tex]
Hence, the concentration of zinc in the environment in mg/L is [tex]10^4\ mg/L.[/tex]
(a) As given in question,
concentration of zinc in atmosphere = 10 g/L
By converting g to nano gm,
[tex]1\ g\ =\ 10^9\ nano\ gm[/tex]
[tex]=>\ 10\ g\ =\ 10\ \times\ 10^9\ nano\ gm[/tex]
[tex]=\ 10^{10}\ nano\ gm[/tex]
Hence, the concentration of zinc in the environment in nano gm/L is [tex]10^{10}\ nano\ gm/L.[/tex]
How many times greater is the flux from a star that is 8.50 times hotter than our Sun? times greater 2nd attempt See Hint How many times greater is the flux from a star that is 8.50 times hotter than our Sun? 2.92 times greater 1st attempt Feedback How many times greater is the flux from a star that is 8.50 times hotter than our Sun? 8.50 times greater
The flux from a star that is 8.50 times hotter than our Sun is approximately 73.02 times greater.
Explanation:The flux from a star that is 8.50 times hotter than our Sun is approximately 73.02 times greater.
In astronomy, the flux from a star is related to its temperature and luminosity. The luminosity of a star is determined by its surface area and energy flux, which is the power emitted per square meter. Since the temperature is nearly the same for both stars, the ratio of their luminosities will be equal to the ratio of their surface areas. Using the formula for surface area of a sphere, we can calculate how many times greater the flux from the hotter star is compared to our Sun.
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The flux from a star that is 8.50 times hotter than our Sun is 8.50 times greater.
Explanation:The flux from a star that is 8.50 times hotter than our Sun is 8.50 times greater. The flux from a star, which is 8.50 times hotter than our Sun, is 8.50 times greater due to Stefan-Boltzmann's law. This law states that the energy radiated by a blackbody (like a star) is directly proportional to the fourth power of its temperature.
As a result, when the star is 8.50 times hotter, its temperature is raised to the fourth power, leading to a significant increase in flux. This demonstrates the pivotal role temperature plays in determining a star's luminosity. Such insights are essential in astrophysics for understanding the energy output and characteristics of different celestial objects.
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The age of the Universe is estimated to be
13,700,000,000
This age can also be written as
1.37x107
1.37x108
1.37x109
1.37x106
1.37x1010
1.37x100
Answer:
Option (5)
Explanation:
A very small or very large number can be written in short form with help of scientific notation, in the scientific notation, a number is written as the product of a whole number between 0 to 9 and exponent of 10.
If we shift the decimal towards the left of the numbers then the nth power of 10 increases, and when we shift the decimal to the right of the number then the nth power of 10 decreases.
Thus, the age of the universe is given to be 13,700,000,000.
So we can write this huge number using scientific notation as 1.37×10^10.
hence, the correct answer is option (5).
If you travel west through 10 degrees of longitude along the equator, the distance traveled will be very different from the distance traveled through 10 degrees of longitude at 60 degrees North latitude. Why?
When you travel θ degrees of longitud at a certain latitude, you are travelling along the arc of a circle. The radius R of that circle is decreases as you approach one of the poles: it is maximum at the equator, and zero at the pole.
The arc of circle is S = R*θ. At 60 degrees latitud North, R is less than at the equator.
How is it possible for clouds at different altitudes to be moving in different directions?
Answer:
Answered
Explanation:
Clouds move in opposite directions between the wind ,usually change direction with increasing height above the ground.
For example:- low-level clouds behind a cold frontal passage move to an area from the North East, whereas the winds aloft along with mid- and high-level clouds behind the front as still from the South West.
In the Northern Hemisphere, when the wind change direction from the surface to aloft in a clockwise (counter-clockwise) direction it is called ‘veering’ (‘backing’).
The veering (backing) vertical wind profile generates upward (downward) vertical motion warm (cold) air convection and dynamic instability.
Question 10 Multiple Choice Worth 3 points) Which of the following is the least dense? asthenosphere continental crust Ocore mantle oceanic crust
Answer:
Option (2)
Explanation:
The earth's interior is divided into 3 parts which includes the crust, core and the mantle. The core of the earth represents the extreme interior part of the earth which is covered by the mantle. The density of the core is the highest and is approximately 13 g/cm³, Whereas, the density of the mantle (including both the upper and lower mantle) is relatively less and is about 4.5 g/cm³ on an average.
The asthenosphere is the layer in which the rocks are solid but they tends to flow during deformation. This layer is present in the apex portion of the upper mantle and it has a density of nearly 3.3g/cm³.
The continental and the oceanic crust represents the outermost portion of the earth. The rocks of oceanic crust are denser than the rocks of continental crust. The density of the oceanic crust is nearly 3 g/cm³ and continental crust is 2.7g/cm³.
Thus, the continental crust is the less dense, compared to the other layers of the earth.
Hence, the correct answer is option (2).
Among the options provided- asthenosphere, continental crust, core, mantle and oceanic crust, the continental crust is the least dense. It has density roughly around 3 g/cm³ which is lesser than others.
Explanation:Based on the information provided about the various earth layers, the continental crust is the least dense. The continental crust covers 45% of Earth's surface, and has a variable density roughly averaging around 3 g/cm³. This is less than the density of other layers such as the mantle, which has a density that increases from about 3.5 g/cm³ to more than 5 g/cm³ due to compression of overlying material. Similarly, the core, comprised of dense metals like iron and nickel, is denser than the continental crust. Finally, the asthenosphere, which is a part of the upper mantle beneath the lithospheric plate, has similar densities to the rest of the mantle, making it denser than the continental crust as well.
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1) Joints differ from faults primarily
with respect to the types of deformation that form them
with respect to strength of the rocks
whether displacement has occurred
the amount of weathering to which they are prone
2) The law of cross-cutting relationships pertains to the age relationships in a sequence of sedimentary layers.
True
False
3) Neutrons add charge, but not mass, to an atom.
True
False
Answer:
1- Option (C)
2- TRUE
3- FALSE
Explanation:
Joints are the type of fracture that splits the rock into two parts thereby the blocks move away from one another. They are formed due to the tensional force. Whereas, the fault, in simple terms is defined as the cracks or fractures present in the crust of the earth. They are formed by both tensional as well as compressional forces. They differ from one another in terms of displacement. In a fault, the relative displacement between the blocks is more than in the case of joints.
According to the law of cross-cutting relationships, geological features such as faults, igneous intrusions, that cuts across the sedimentary layers on earth are younger than those sedimentary rocks.
A neutron is a neutral particle as it does not carry any kind of electric charge. So, the addition or elimination of neutron from the nucleus does not affect the electric charge of the nucleus. But it can cause changes in the mass within the nucleus. Isotopes originate due to the addition or removal of neutrons from a nucleus.
Hence, the correct answers are given above.
The climatic shift that was a major contributing factor to the collapse of the Viking colonies is known as the ________ ____ _____
Answer:
Greenland Norse collapse
Explanation:
The southern Greenland Vikings numbering 5000 at their peak never gave up their old way of lifestyle and did not adopt that of the Northern Inuits who arrived a century later after them. The study suspects that the climate factors became dominant and they were destroyed by the shifting nature of mother earth hence they starved to death and could not adapt to the present change in weather patterns this society collapsed. Some theories say soil grazing and over-exploitation of land lead to the effect of black deaths and the creation of ice age. It indicated that the number of fertile women dropped and thus population could not sustain itself.When considering centrifugal force, which of the below scenarios has a sign coefficient of 1?
A .Southern Hemisphere Low pressure
B. Northern Hemisphere Low pressure
C. Northern Hemisphere High pressure
D. Western Hemisphere Low pressure
Answer:
A .Southern Hemisphere Low pressure
Explanation:
When considering centrifugal force, The southern Hemisphere Low pressure has sign coefficient of 1. The rotation of Earth causes the centrifugal acceleration. The magnitude of centrifugal force is given by mv^2r.
Where m is mass of rotating body , v is the linear velocity and r is the radius of rotation. The centrifugal force always works outside the center of the circular motion.
(This is for US Music Social & Political Impact) Need a paragraph please
What factors made the study of traditional Native American music difficult for the ethnomusicologists who were interested in researching it?
Answer and Explanation:
Native american don't have any melodic hypothesis to give data with respect to their melodic traditions.Their music is fundamentally vocal and non-instrumental this makes measure of data present in open circle even less.Also local american culture has been hurt and devastated by non-locals, as America was settled essentially from European and African pilgrims
So generally we rely upon records of European Scholars with respect to the history and culture of local Americans.These European researchers had distinctive taste of music, so records of these researchers are misshaped. That is the reason it is hard for the ethnomusicologists to examine the local american music.
question 55:
As the altitude increases, the temperature of the atmosphere decreases in this layer of the atmosphere.
I. Troposphere
II. Stratosphere
III. Mesosphere
IV. Thermosphere
Question 55 options:
I and III
II and III
I and II
II and IV
Answer:
Option (1)
Explanation:
The atmosphere plays an important role in controlling the earth's climate. This atmosphere is comprised of different layers. They are as follows-
(a) Troposphere- This layer extends up to a height of about 10 km from the ground surface. In this layer, the temperature and altitude are inversely proportional to one another. This decrease in the temperature with increasing height is known as the Lapse rate and is 6.5 degree C/km.
(b) Stratosphere- This layer is present above the troposphere. It extends from about 10 to 50 km above the surface. Here, the temperature increases with height. It is because of the presence of ozone in this layer that warms the layer.
(c) Mesosphere- This layer is above the stratosphere and below the thermosphere. It extends vertically from about 50 to 80 km above the ground surface. The temperature again decreases with height in this layer.
(d) Thermosphere- This layer forms the outermost layer. Here, the temperature and height are directly proportional to each other.
Thus, the temperature decreases with altitude in the layers, namely the troposphere and the mesosphere.
Hence, the correct answer is option (1).
What are the advantages and/or disadvantages of using GE
crops?
Answer:
Various advantages and disadvantages are given as under
Explanation:
Pros:
As Genetically modified crops are genetically disease resistant they have been proven safe through testing and use. They increase the nutrient contents and reduce the worldwide hunger levels, also lower prices of food. They lead to environmental benefits such as reduced pesticides use and lower carbon emissionsCons:
They have not been proven safe for human consumption through trials. Genetically modified crops can lead to the development of various food allergies in the body. They are water-intensive Increased use of toxic herbicides and pesticides damages soil fertility.