Answer:
Africa and North America have moved away from each other for 2 × 10⁸ years.
Meaning they were right next to each other 200 million years ago.
Explanation:
Given,
- Africa and North America are moving away from each other at a velocity (rate) of 3 cm/year.
-Africa and North America are presently 6000 km apart.
Speed = distance/time
Time = distance/speed.
Distance = 6000 km = 6000000 m
Speed = 3 cm/year = 0.03 m/year
Time = 6000000/0.03 = 2 × 10⁸ years.
We observe a glowing cloud of gas in space with a spectroscope. We note that many of the familiar lines of hydrogen that we know on Earth seem to be in a different place. They are shifted toward the blue or violet end of the spectrum compared to their positions in the spectrum of glowing hydrogen gas on Earth.
From this we can conclude that:
A. the cloud is much hotter than hydrogen on Earth.
B. the cloud is moving away from us.
C . the cloud is moving toward us.
D. the cloud is much cooler than hydrogen on Earth.
The gas cloud is moving away from us based on the redshift of the light. Using the Doppler shift formula, we can calculate the speed of the gas cloud.
Solution
Because the light is shifted to a longer wavelength (redshifted), we know this gas cloud is moving away from us. The speed can be calculated using the Doppler shift formula:
speed = (observed wavelength - rest wavelength) / rest wavelength * speed of light
When map scale is expressed as a ratio of map distance to ground distance (i.e., map distance:ground distance), there is an inverse relationship between the extent of coverage of the entire map and the amount of detail visible.True/False
Answer: True
Explanation:
The ratio of the map distance to ground distance usually involves the use of inverse relationship between the extent of coverage of the entire map and the amount of detail visible. And this relationship is always written as 1/x or 1:x.
Where the numerator represents the map distance which always equals 1 and the denominator represents the ground distance which has similar units as the numerator.
Answer:True
Explanation:
For instance, 2cmrep 1km
1km on the map is inversely related to 2cm on the ground surface. This can be express as as statement scale in geography. Other types of scales are linear scale and representative fraction
From a sample with nequals36, the mean duration of a geyser's eruptions is 3.16 minutes and the standard deviation is 0.82 minutes. Using Chebyshev's Theorem, determine at least how many of the eruptions lasted between 0.7 and 5.62 minutes.
Answer: -3.154 eruptions lasted for 0.7mins and 1.767 eruptions lasted for 5.62mins
Explanation:
The attachment below shows the explanation and how to determine the duration of each eruptions.
Using Chebyshev's Theorem, at least 88.9% (or around 32) of the sample of 36 geyser eruptions would last between 0.7 and 5.62 minutes.
In statistics, Chebyshev's Theorem allows us to predict the proportion of data that falls within a certain number of standard deviations from the mean. The theorem states that at least 1 - 1/k^2 of the data lies within k standard deviations of the mean for all k > 1.
In this case, the mean duration of a geyser's eruptions is 3.16 minutes, and the standard deviation is 0.82 minutes. The interval of 0.7 to 5.62 minutes is roughly calculated to be minus 3 and plus 3 standard deviations from the mean. According to Chebyshev's Theorem, at least 1 - 1/3^2 = 8/9 or 88.9% of the data falls within this range.
As we know the total sample size is 36, we then calculate 88.9% of 36. It results in around 32 geyser eruptions that would last between 0.7 and 5.62 minutes.
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what two factors lead to high crop yields in europe's agriculture
Answer:
Soil and fertilizers
Explanation:
beacuse these two factors will lead the crops to grow faster...
Answer:Temperature and Rainfall
Explanation:
Temperature : Most plant cannot grow if temperature falls below 6degree celcius or the soil is frozen for five consecutive months.
Rainfall: Water is obviously a key factor in plant growth. The greater the average temperature, the greater the amount of water required for plant growth. Seasonal crops require water at different times.
These are the aforementioned factors that leads to high crop yield in Europe.
If you were using both a compass and a map marked with latitude and longitude to navigate, you might note the angle difference between your compass and what is marked on the map, called _______.
a. magnetic inclination
b. magnetic declination
c. magnetic dipole
d. magnetic reversal
Answer:
B. Magnetic declination
Explanation:
Magnetic declination is the tendency of the compass not to point directly to the true North which appears on the map.
Many types of mining, such as for coal and copper, produce a specific type of water pollution called ________.
A. suspended limestone particles
B. chlorinated pesticides
C. acid drainage
D. radon gas
E. eutrophication
Answer:
C. acid drainage
Explanation:
Many types of mining, such as for coal and copper, produce a specific type of water pollution called ___acid drainage_____.
Answer:D
Explanation:
Europhication: This can be defined simply as the production of organic matter in excess of what an ecosystem is normally adapted to.
ice sheet contains 3 million cubic kilometers of ice. if completely melted, this ice would release about 2.7 million cubic kilometers of water, which would spread out over earth's approximate 337 million square kilometers of ocean surface. how much would the sea level rice
Answer:
8.011 m
Explanation:
Data provided in the question:
Volume of the ice sheet = 3 million cubic kilometers
Volume of the water released by the ice on melting = 2.7 million cubic kilometers
Approximate area of the Earth's ocean surface = 337 million square kilometers
Now,
Volume = Area of the surface × Height
thus,
2.7 million cubic kilometers = 337 million square kilometers × Height
or
Height = 2.7 ÷ 337 kilometer
= 0.008011 kilometer
also,
1 kilometer = 1000 meter
Therefore,
Rise in the sea level = 0.008011 × 1000
= 8.011 m
What type of plate boundary is directly west (and adjacent) to the plate on which Montana is located?
Answer:
Pacific plate boundary.
Explanation:
The Montana falls in the North American boundary and the pacific plate lies west to this plate and is a major tectonic plate and it consists of the hotspots and in the interior and the Hawaiian islands. Being a major oceans plate its motion is northwestwards. And is considered as a divergent boundary.Answer:
Transform plate boundary
Explanation:
Montana is a part of the North American plate. Towards the west of this city Montana, there is a transform plate boundary, where the Pacific plate slide past the North American plate, giving rise to the formation of the world-famous San Andreas fault. A large number of shallow focus destructive earthquakes are generated every year in this region. This is an earthquake-prone zone. This fault about 1200 kilometers long and passes through the city of California, and here the fault is a strike-slip fault which is right-lateral in nature.
Classify the government of each country by who has the power. Is the government a democracy, a monarchy, or a dictatorship? If it is a monarchy or a dictatorship, explain what kind. (1 point)
a.Japan:The country is ran as a constitutional monarchy ran by the monarchy and checked by the constitution
b.North Korea:North Korea is a dictatorship. Only the dictator holds power.
c.The Philippines:The Philippines are a presidential republic much like the USA
Answer:
Explanation:
Japan: Constitutional monarchy
A form of government in which a non elected monarch functions as the head of the state but within the limits of a constitution is called constitutional monarchy. The power is shared between a government and the monarch. e.g Britain.
Korea: One person Dictatorship
The from of government in which a small group or a person have the absolute power and there are no constitutional limitations on them is called Dictatorship. African nations such as Zimbabwe, Uganda and Asian nation North Korea and Eastern countries such as Syria are dictatorships.
Philippines: Republic democracy
A Presidential system is a a republican and democratic form of government in which the legislative branch is separate form the executive branch and the head of the government leads the executive branch. The head of state is called president and it is a ceremonial post.
A. Japan: Constitutional monarchy
B. Korea: Person Dictatorship
C. Philippines: Republic democracy
A. Japan has a constitutional monarchy where the Emperor serves as a symbolic figurehead, and the government is run by elected officials. The Japanese parliament, known as the National Diet, holds significant authority, and the Prime Minister is the head of government.
B. Korea can refer to two separate countries: North Korea, which operates as a person dictatorship with a single-party rule, and South Korea, a democratic republic with elected leaders and a multi-party system.
C. The Philippines is a republic democracy with an elected President as the head of state and government. The country has a Congress for legislation and an independent judiciary.
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The search for black holes has so far turned up some fairly convincing stellar-sized candidates in binary star systems. What observations could you make to distinguish whether the unseen object in one of these systems is a black hole or a neutron star?
Answer:
Th similarities between the black hole and the neutron star is that they are formed from dead (dying) starts. But they come from different parent stars, if the parent star is 1.4 times the mass of the sun, a neutron star will be formed, but if the parent star is twice the mass of the sun a black hole is formed.
Explanation:
A black hole is defined as an area of space whereby the matter is so compacted that nothing can escape from it. This area is called event horizon. Black holes are formed when an enormous star dies in z supernova. They weigh at least twice the sun's mass, and their mass is directly proportional to their radii.
Neutron stars are created during supernova and maintained by a neutron called degeneracy pressure. Neutron star has a small radius, typically 30 km, with a very high density made up of compacted neutrons.
"The ocean and continental crust that we see is actually submerged. Approximately, how much of the crust is typically submerged (deeply rooted)?"
Answer:
Continental crust is about 20 to 70 km thick and thus 70% of this submerged and oceanic crust being about 10 km thick is only 30 % submerged.
Explanation:
As the hydrological crust is considered to be much denser than the oceanic crust hence at the subduction zones the crusts sink into the mantel and are beneath the lighter continental crust as the oceanic crust is much older than the continental crust. As the continental crust forms many layers and has a bulk composition and the average density is about 2.83 g/cm and has a thickness of about 7 to 10 km.The Continental Divide ______.
A.) divides the United States into east and west
B.) divides the United States into north and south
C.) divides the flow of river systems in the United States into east and west
D.) is a series of rivers and mountains that separates Canada from the United States
Answer:
option d is correct I think
The Continental Divide of the Americas is the principal, and largely mountainous, hydrological divide of the Americas. This divide runs from Cape Prince of Wales in western Alaska, through the Rocky Mountains of western Canada and the continental United States, then through the Sierra Madre Occidental mountains in Mexico, through Central America and along the Andes Mountains of South America. Continental divides separate one drainage basin from another. They are used to define the direction that an area's rivers flow and drain into the oceans and seas. The best-known continental divide is in North America and it runs along the Rocky and Andes mountain ranges
At a convergent plate boundary, A. sea floor is produced. B. high mountains may be built during continent-continent collision. C. there are very few earthquakes. D. All of the choices are correct.
Answer:
The correct answer is B - high mountains may be built during continent-continent collision.
Explanation:
A convergent plate boundary is where two or more tectonic plates collide. When this happens, subduction (one of the plates will slide under the other) occurs.
During continent-continent collision, a high mountain range is usually formed.
In recent years, significant advances have been made in hurricane tracking technology, to the extent that they can be tracked from the moment they form as tropical waves off the coast of West Africa to their landfall in the United States.a. True.b. False.
Answer:
a. True
Explanation:
As scientists has developed a significant advanced technology that enables us to track down the path of motion of the cyclones and hurricanes and help us to identify their formation types and thus enables us to plan out emergency operations in advance and thus can tell when a cyclonic is going to make a land and where.Imagine that biostimulation is used on a widespread scale for a bioremediation project.
What ecosystem changes represent a potential side effect of the cleanup efforts?
Answer:
Explanation:
The biostimulation can be define as the process of modifying the environment by the stimulating the growth of bacteria which are capable of conducting the bioremediation. The bioremediation is the process through which the microorganisms are used to break down and decomposed the environmental pollutants from the polluted site.
This can be achieved through addition of the nutrients and electrons acceptors like nitrogen, oxygen, phosphorus and carbon in the from of molasses. These factors are likely to enhance the growth of the bacteria to an extent that can damage the organisms of the ecosystem or the growth factors can be also suitable for the growth of other microorganisms which may infect the other living beings of the ecosystem.
Final answer:
Biostimulation used in bioremediation may lead to disruptions in microbial ecosystems, affecting biogeochemical cycles and plant health, as well as possible biomagnification of biological agents, resulting in health issues for wildlife and humans.
Explanation:
When biostimulation is employed on a widespread scale for a bioremediation project, there are potential ecosystem changes that could occur as side effects. One potential side effect is the disruption of the natural microbial taxonomic distribution and functional profiles which could lead to changes in biogeochemical cycling and overall plant health. Another concern is the possibility of biomagnification, where the biological agents used for cleanup might accumulate in the food chain, potentially leading to issues such as endocrine disruption, birth defects, and other health impacts on both wildlife and humans.
An example of bioremediation is depicted by option E: Using plants to remove toxic metals from soils following a mining operation, which is a type of phytoremediation. This process can sometimes alter soil structure and nutrient cycling, potentially affecting other ecosystem services and biodiversity. These changes could have short-term effects, such as altered hydrology and productivity, or long-term impacts, which might include shifts in the types and numbers of species found in an ecosystem.
Type 43 25 04.18N 113 31 37.38 W in the search bar of Google Earth. Zoom out to an eye elevation of ~90 miles. Based on the size of the area which is dark colored and sparsely vegetated, this region is:A. Shield VolcanoB. Lava domeC. Composite volcano
Answer:
flood basalt
Explanation:
In the given problem, the region is likely a flood basalt. A flood basalt is commonly referred to as a geological feature that is formed from the eruption of a giant volcanic. It can also be formed from several volcanic eruptions that occur over a significantly large area of land as well as an ocean flood that is accompanied by a basalt lava.
The correct Answer is option (A). Based on the coordinates 43°25'04.18"N 113°31'37.38"W and the description of the area being dark-coloured and sparsely vegetated, this region is most likely Shield Volcano
1. Location: The coordinates point to an area in Idaho, USA, specifically within the Snake River Plain.
2. Dark Colour and Sparse Vegetation: These characteristics are typical of regions covered by basaltic lava flows. Basalt, being a dark volcanic rock, covers the ground extensively in shield volcano regions.
3. Geological Features: The Snake River Plain is known for its extensive volcanic activity, particularly from shield volcanoes and lava fields, rather than the steep and more rugged profiles of composite volcanoes or lava domes.
Shield volcanoes are typically broad with gentle slopes, formed by low-viscosity basaltic lava that can cover large areas. This fits the description of a large, dark-coloured, and sparsely vegetated area.
Chicago experienced unemployment problems, poor schools, and substandard housing during the early part of the twentieth century; hence, criminal behavior could be expected in these zones according to Select one: a. Sutherland and Hirschi. b. Merton and Miller. c. Lombroso and Dugdale. d. Shaw and McKay.
Answer:
chicago
Explanation:
is part of the twentieth move of the centery
You are working in a group taking sediment samples along a transect from a beach, into deeper water. Someone forgot to label the jars and they got mixed up so it is now not clear which sample came from which location. Based on what you know about particle size and transport, how can you arrange the samples in the correct order
Answer:
It is commonly known that the settling time of particles with smaller sizes is higher than that of particles with larger sizes. Therefore, the particles with smaller sizes are moved further offshore. Based on this fact, the proper arrangement will be to arrange the particles according to their sizes from those with the largest sizes (nearshore) to those with the smallest sizes (furthest offshore).
Explanation:
It is commonly known that the settling time of particles with smaller sizes is higher than that of particles with larger sizes. Therefore, the particles with smaller sizes are moved further offshore. Based on this fact, the proper arrangement will be to arrange the particles according to their sizes from those with the largest sizes (nearshore) to those with the smallest sizes (furthest offshore).
The Earth formed its compositional layers (core, mantle, crust, atmosphere) by accretion in stages: first iron-rich materials, followed by rocky materials, and finally by ices.
Answer:
As described below.
Explanation:
The earth has core is the innermost layer and is made up of iron, nickel, and alloy rich content and is about 2,900 to 5100 km in depth, has a surface temperature that goes up to 5700 K and is responsible for producing the magnetic waves and the semis waves. And there is the densest part of the planet, followed by the cover of the mantle that is made of silicate rocks and ice and planetary layer that undergoes differential density and has a thickness of 2,900 km and is divided into the three layers of the upper, middle and the lower. The uppermost layer is called the asthenosphere and forms the base of the oceanic crust followed by the lithosphere crust. That is igneous, metamorphic and the sedimentary ricks and has a density of 2.83 g/cm.Final answer:
The Earth's layers formed by accretion in stages with gravity separating materials by density, creating the core, mantle, and crust. This process is known as differentiation.
Explanation:
The statement that the Earth formed its compositional layers (core, mantle, crust, atmosphere) by accretion in stages, with iron-rich materials first, followed by rocky materials, and then ices, is true. During the formation and early history of Earth, gravity played a crucial role in separating materials based on their densities. The denser materials, such as iron and nickel, sank to form the Earth's core, while lighter materials rose to the surface to eventually form the crust. This process, referred to as differentiation, led to the creation of distinct layers including the core, mantle, and crust. Earth's atmosphere formed later, consisting of gases that were either released from volcanic eruptions or delivered by cometary impacts. The Earth's structure today is the result of these processes, where the crust is primarily made of lighter elements like silicon, oxygen, and aluminum, the mantle consists of heavier rocks, and the core is composed mostly of iron and nickel.
Wetlands are important for all of the following reasons EXCEPT: A. They support high species diversity. B. They reduce flooding by slowing the velocity of runoff water. C. They help recharge groundwater aquifers. D. They contribute to asymmetry in urban communities. E. They sometimes detoxify substances in the water.
Answer:
Wetlands are important for all of the following reasons except option D
Explanation:
Wetland is a ecosystem which contain water that is present either seasonally or permanently and this water body is rich in species diversity as the water body contain high amount of minerals.w
They are natural detoxifier as they have the capability to reduce the effect of harmful substance that may enter into the ponds, lakes or other water body thus it is also called as the natural kidney of ecosystem.
They reduce the chance of flood by temporarily storing the release of storm water which allows the formation of sediments in the bottom of the water body.
Some fresh water wetlands located at a point where surface water enters into the ground water and thus causes recharge of ground water.
Wetlands are significant for many reasons, including biodiversity support, flood control, groundwater supply, and sometimes detoxification. However, they do not contribute to urban asymmetry.
Explanation:Wetlands serve many crucial roles, including supporting high species diversity, reducing flooding by slowing down the velocity of runoff water, recharging groundwater aquifers, and at times, even detoxifying substances in the water. However, they do not contribute to asymmetry in urban communities, so option D is not a correct reason why wetlands are important.
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Two 6.9 magnitude earthquakes occurred approximately 6 months apart in 1988 and 1989. The death toll in the Armenian earthquake was 25,000 people, while the death toll in the Loma Prieta quake was 62 people. What factor was most responsible for the difference in the death toll?
Answer:
hi!
Explanation:
A comparison between two very similar earthquakes supports this claim. Both occurred in densely populated regions, but had very different results. In 1988, the Spitak magnitude 6.9 earthquake in Armenia claimed more than 25,000 lives. On the contrary, the magnitude 7.1 earthquake Loma Prieta in California in 1989 caused only 63 deaths. "The difference in the number of deaths illustrates the enormous effect that high construction standards can have to save people's lives."
True or False: The primary function of a weather satellite is to passively observe clouds from space while weather radar is designed to measure the intensity of precipitation.
Answer:
True
Explanation:
I googled it
Answer:True
Explanation:
Weather satellite is primarily used to monitor the weather and climate of the earth. Satellite can be polar orbiting, covering the entire earth geostationary over the same spot of the equator.
Flowing-water ecosystems, especially headwater streams, receive most of their energy from: A. light. B. water. C. wind. D. organic detritus. E. minerals.
Answer:
Option (D)
Explanation:
Organic detritus usually refers to those materials that are the remains of dead organisms such as plants and animals.
The flowing water ecosystem such as the head-water streams obtains most of the materials from the nearby terrestrial and aquatic places due to the surface runoff. It is highly rich in the amount of organic detritus, as the materials such as leaves, branches, roots, soil particles, and other organic waste products are transported from the land areas, thereby obtains its energy from them.
Thus, the correct answer is option (D).
Which regions have the most clearly defined boundaries? A. Peripheral. B. Functional. C. Vernacular. D. Formal.
D. Formal regions have the most clearly defined boundaries. They are areas recognized by the government and other organizations and have clear-cut boundaries. Other types of regions such as peripheral, vernacular, and functional regions don't have as clear-cut boundaries.
Explanation:The region with the most clearly defined boundaries are formal regions. A formal region, such as a country, state, or city, is an area that is defined by official boundaries and is recognized by government and other organizations. These regions have clear-cut boundaries established by the government, for example, a state's borders in the United States, or the geographical borders of a country.
On the other hand, Peripheral and vernacular regions are more subjective and their boundaries can change depending on personal perspectives and interpretations. A functional region, such as a school district or a business service area, is defined by a particular set of activities or interactions that occur within it. But their boundaries are not as clear-cut as a formal region's boundaries because they can change based on the activity or interaction that is being focused on.
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What is the difference between a cobble-sized piece of colluvium found on slopes and a cobble-sized piece of alluvium found along river beds?
Answer:
Their composition
Explanation:
Colluvium deposits will contain cobble sized deposits ranging from sand to rocks of different types while the alluvium deposits are uniform deposits of cobble sized sand
Seismic resonance is responsible for the damage caused to building by earthquakes. Apply the concepts of wave energy and resonance to explain how earthquakes damage the man-made structures.
Answer:
The building will vibrate around one particular frequency known as its natural, frequency, the building and ground share the building frequency its said to be in resonance.
Explanation:
Resonance is the frequency of the system to oscillate with a greater velocity than the others as all buildings have a resonance period which is the number of seconds for a building to vibrate and the ground also shows the seismic resonance frequency, the mismatch of the resonance and the wave frequency. Thus taller buildings will be damaged more than shorter structures. These forces create the lateral accelerations that scientists measure by the G-forces. The sudden movement creates enormous stresses for the building's structure, including the beams, the columns, and the walls and the floors, as well as the joints that hold them together. If that stress is large enough, the building can collapse.Answer:
Earthquakes produce traveling mechanical waves known as seismic waves. These waves propagate by vibrating the ground (solid media), water, and to a lesser degree the air, in areas surrounding the epicenter of the earthquake.Energy from the waves also produces vibrations in buildings. If the frequency of the vibrating ground matches the natural frequency of the building, resonance is produced in the form of standing waves that amplify the vibration to levels that can destroy the structures.
Explanation:
Jabo Corporation has its home office and manufacturing facilities in Peru. It sells products via the Internet in both Brazil and Chile, although it has a small sales and manufacturing facility in Santiago, Chile.
True/False
The Jabo Corporation operates in Peru, Brazil, and Chile, making it a multinational corporation that adheres to differing laws and regulations in various countries is True.
Explanation:The Jabo Corporation scenario outlines an example of a multinational corporation which operates in multiple countries. It is based in Peru with manufacturing facilities located there, however, it also has a footprint in Brazil and Chile via online sales and a smaller facility in Santiago, Chile, respectively. This is a common structure for corporations which seek to expand their operations, reach broader markets, and potentially take advantage of financial or logistical benefits within those other locales. It must also be noted that such multinational corporations usually face various laws and regulations in different countries which can affect their operations.
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Which country has four official languages: Spanish, Quechua, Aymara, and Guarani? View Available Hint(s) Which country has four official languages: Spanish, Quechua, Aymara, and Guarani? Bolivia Costa Rica Ecuador Argentina Paraguay Previous Answers Correct As described in a note at the bottom of the map legend, Bolivia has four official languages (Spanish, Quechua, Aymara, and Guarani).
Answer:
Bolivia
Explanation:
Bolivia is a central South American country and its administrative capital is La Paz. La Paz is located on the Andes Altiplano plateau. Bolivia was named after the fighter Simon Bolivar. It broke away from the Spanish rule in 1825.
Spanish is the official language of Bolivia but there are 36 indigenous languages spoken and used by peoples in different regions of Bolivia. Quechua, Guarani and Aymara are the most spoken indigenous languages.
Bolivia is the country with four official languages: Spanish, Quechua, Aymara, and Guarani, reflecting its deep cultural and linguistic diversity.
Explanation:The question involves identifying a country with four official languages: Spanish, Quechua, Aymara, and Guarani. The correct answer is Bolivia, a country within the core of the Rural Amerindian Region of South America, alongside Ecuador and Peru. Bolivia is known for its linguistic diversity, with Spanish serving as the colonial language, yet indigenous languages such as Quechua, Aymara, and Guarani are widely spoken, especially in rural and remote areas. Indigenous languages across Latin America, including those in Bolivia, face challenges in terms of their preservation and inter-generational transmission despite their critical role in maintaining cultural identities.
An isotherm on a map:____________ a) identifies all places that have the same annual mean temperature. b) represents the warmest place on the map. c) represents the coldest place on the map. d) connects points of equal temperature.
Answer: d) connects points of equal temperature.
Explanation: An isotherm is a line drawn on a map or chart of the earth's surface to indicate and connect points having the same temperature at a given time. Isotherm are used in meteorology to highlight the distribution earth surface temperature.
a) The Mayans and Aztecs made notable advances in astronomy and mathematics. b) The Aztecs and Mayans learned to read and write under Spanish rule. c) The Aztecs and Mayans had no concept of the wheel. d) The Incas built many miles of paved roads across their empire.
Answer:
a
Explanation:
Of all the option A is most correct because
America is where so much creativity and invention came into being. Moreover, american people have achieved dominance before the majority of the world did in the subjects of Astronomy and Mathematics. There were two groups of people from prehistoric America: the Mayans and the Aztecs. they use to stay in modern mexico. Through astronomy and mathematics they made impressive strides.