C) The North Pacific. Among the given options, the North Pacific is not considered a good source region for air masses.
Air masses are large bodies of air with uniform temperature and humidity characteristics. They are typically formed over source regions, which are areas where air remains relatively stagnant and acquires the properties of the underlying surface.
The Gulf of Mexico, central Canada, and the central United States are all recognized as good source regions for air masses. The Gulf of Mexico is a warm and moist region, central Canada experiences cold and dry conditions, and the central United States can have a variety of air masses due to its geographic location.
On the other hand, the North Pacific is not considered a good source region for air masses. The North Pacific is influenced by oceanic conditions and experiences a more variable and dynamic weather pattern due to the interaction of different air masses and ocean currents. Air masses formed over the North Pacific do not exhibit as distinct characteristics as those from other regions mentioned.
The Gulf of Mexico, central Canada, and the central United States are recognized as more suitable source regions for the formation of distinct air masses.
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isotherms are lines of equal temperature on a weather map. what pattern do they show worldwide?
Isotherms, which are lines of equal temperature on a weather map, exhibit certain patterns worldwide that reflect the distribution of temperature across the Earth's surface.
One prominent pattern shown by isotherms is the latitudinal variation in temperature. Near the equator, isotherms are relatively straight and horizontal, indicating high temperatures. As one moves away from the equator towards the poles, the isotherms become more curved and converge towards the poles, illustrating a decrease in temperature.
Isotherms also demonstrate the influence of geographical features and oceanic currents on temperature distribution. Coastal regions tend to have more curved isotherms compared to inland areas due to the moderating effect of oceans on temperature. Oceanic currents, such as the Gulf Stream, can create deviations in isotherm patterns, leading to warmer or cooler regions along the coastline.
Mountain ranges can also affect isotherm patterns. As air moves up mountains, it undergoes adiabatic cooling, causing isotherms to shift towards lower temperatures at higher elevations.
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1. If a plane flies from the Equator towards the South Pole it would be deflected to the:A) EastB) West
If a plane flies from the Equator towards the South Pole, it would be deflected to the left or towards- B. the East.
What is the reason?This is because of the Coriolis effect, which is the result of the Earth's rotation. As the Earth rotates on its axis, objects on the surface are deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
This happens because different points on the surface of the Earth are moving at different speeds.
So, as the plane flies south, it will encounter areas of slower rotation, causing it to be deflected to the left. This deflection is more noticeable the closer the plane gets to the South Pole.
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plumes of hot mantle material are responsible for a) the formation of the hawaiian islands. b) the geysers of yellowstone national park. c) the appalachian mountains. d) all of the above de) a
The correct answer is (d) all of the above. Plumes of hot mantle material can be responsible for the formation of volcanoes and mountains in several ways.
In the case of the Hawaiian Islands, the volcanoes are formed due to the upwelling of hot mantle material, which results in the formation of new crust and the creation of volcanoes. In Yellowstone National Park, the geysers and hot springs are caused by the movement of magma and hot water from deep within the Earth, which is driven by the upwelling of mantle material.
The Appalachian Mountains are thought to have formed as a result of the movement of the North American Plate over a mantle hotspot, which caused the upwelling of hot mantle material and the creation of a volcanic chain. Plumes of hot mantle material can be responsible for the formation of volcanoes, hot springs, and mountains, and this process can occur in multiple geological settings.
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why are invasive species a greater problem in eastern brazil compared to the rest of the country?
the combination of high biodiversity, favorable climate, human activity, and environmental degradation makes eastern Brazil particularly vulnerable to invasive species.
One of the main reasons is the region's high level of biodiversity, which provides ample opportunities for non-native species to establish themselves and thrive. Additionally, the region's climate is favorable for many invasive species, with warm temperatures and high humidity creating ideal conditions for growth.Another factor contributing to the problem is the region's high level of human activity. Eastern Brazil is home to several major cities and ports, which have served as entry points for many invasive species. Additionally, the region has a large agricultural sector, which often relies on non-native crops and livestock that can become invasive if not properly managed.
Finally, eastern Brazil has experienced significant environmental degradation in recent decades, which has made it easier for invasive species to gain a foothold. Deforestation, habitat fragmentation, and soil erosion have all created conditions that are more favorable for non-native species than for native ones.
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3. the deepest, fastest channel in a river is call the _____.
The deepest, fastest channel in a river is called the Thalweg. The thalweg refers to the line connecting the lowest points along the riverbed, which typically represents the path of the fastest flow within the river.
It is the line that water would follow if the river were drained, and it is influenced by factors such as the river's gradient, shape, and flow dynamics. The thalweg plays a crucial role in river hydrodynamics as it determines the direction and speed of water flow.
It is often deeper than other parts of the river and can be characterized by more turbulent and rapid water movement. The thalweg is important for navigation, erosion patterns, and habitat formation in the river. Understanding the thalweg is significant for various purposes, including engineering projects, flood control, and water management.
By mapping and studying the thalweg, scientists and engineers can gain insights into river behavior and make informed decisions about infrastructure development and water resource management.
In summary, the deepest, fastest channel in a river is called the Thalweg. It represents the line connecting the lowest points along the riverbed, indicating the path of the fastest flow within the river. Understanding the thalweg is crucial for various applications related to river dynamics and management.
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Complete Question:
The deepest, fastest channel in a river is called the _____.
a. Rapids
b. Channel
c. Thalweg
d. Undetermined
Which of the following are examples of short-term, human-induced environmental changes? Select three answer choices.
The three examples of short-term, human-induced environmental changes are deforestation, pollution, and global warming.
Deforestation involves the removal of trees and vegetation from an area, often for agricultural or commercial purposes. Pollution refers to the introduction of harmful substances into the environment, such as air or water pollution caused by industrial processes. Global warming is caused by the increase of greenhouse gases, such as carbon dioxide, which trap heat in the Earth's atmosphere and lead to rising temperatures. While mass extinction and ozone layer destruction are also important environmental issues, they are typically considered long-term changes that occur over a much larger time frame.
Three examples of short-term, human-induced environmental changes are deforestation, ozone layer destruction, and pollution.
Deforestation refers to the large-scale removal of trees and forests, often for agricultural or industrial purposes. This process can lead to habitat loss, soil erosion, and contributes to climate change by reducing the Earth's capacity to absorb carbon dioxide.
Ozone layer destruction is caused by the release of certain chemicals, such as chlorofluorocarbons (CFCs), into the atmosphere. These chemicals break down ozone molecules, which protect the Earth from harmful ultraviolet radiation. Ozone layer depletion can result in increased cases of skin cancer and other health issues, as well as harm ecosystems.
Pollution encompasses various forms of contamination in air, water, and soil, resulting from human activities such as industrial processes, waste disposal, and transportation. Pollution can have negative impacts on human health, wildlife, and the overall environment, leading to issues like respiratory problems, water contamination, and habitat destruction.
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The complete question is:
Which of the following are examples of short-term, human-induced environmental changes? Select three answer choices
mass extinction
global warming
deforestation
ozone layer destruction
pollution
FILL IN THE BLANK. niagara falls is a large waterfall on a river, so it can be considered as an example of ________.
Niagara falls is a large waterfall on a river, so it can be considered as an example of Hydrology or hydrological feature.
A waterfall is a natural feature in which water flows over a steep vertical drop, creating a dramatic cascade of water. Waterfalls can be found in many different types of terrain, including mountains, canyons, and forests, and can range in size from small cascades to massive, multi-tiered falls. Waterfalls are typically formed by the erosion of rock and soil by the force of water, and can be affected by factors such as weather, season, and human activity. They are often celebrated for their beauty and power, and can be popular destinations for tourists and outdoor enthusiasts.
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hypothesize about drawbacks to hydrofracking. although hydrofracking makes gas shales economically viable, which of the following are disadvantages to hydrofracking? choose one or more: a. it requires dangerous human labor underground. b. it is very labor intensive. c. it requires the extraction of large amounts of soil and rock, scarring the landscape. d. it uses water, which is a valuable resource.
It mines large amounts of soil and rock, spoils the landscape, and consumes a precious resource water.
Option c and d is correct
Hydraulic fracturing is a water-intensive process that requires large volumes of water to be mixed with chemicals and injected into the ground. This can be a problem in areas with limited or scarce water resources. Hydrofracking water withdrawals can stress local water supplies and cause competition with other water users such as agriculture, communities and ecosystems.
Additionally, the water used in the process becomes contaminated and must be treated and disposed of properly, creating water management challenges and potential environmental risks.
Hence, Option c and d is correct
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according to natural selection, specific traits that may have emerged through evolution are those that
According to natural selection, specific traits that may have emerged through evolution are those that provide an advantage to an organism in its environment. Organisms with these advantageous traits are more likely to survive and reproduce, passing on their traits to their offspring.
Over time, these traits become more common in the population as they are selected for by the environment.
There are various factors that can influence the development and selection of traits through evolution. These can include genetic mutations, environmental pressures, and even chance events. Some traits may be directly linked to survival, such as the ability to find food or avoid predators. Others may be related to reproduction, such as traits that enhance mating success.
It's important to note that not all traits that emerge through evolution are advantageous. Some may even be harmful or neutral in terms of survival and reproduction. However, if a trait is linked to increased survival and reproductive success, it is more likely to be selected for and become more prevalent in the population over time.
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what is the name of the country where the amazon river ends?
Answer:
Brazil<3
Explanation:
The country where the Amazon River ends is Brazil. The Amazon River, which is approximately 6,400 km (4,000 miles) long, is the largest river in the world by discharge volume and is often considered the second longest river after the Nile.
It flows through multiple countries, including Peru, Colombia, and Brazil, before finally emptying into the Atlantic Ocean. The vast Amazon Basin, which the river runs through, is a vital source of biodiversity and plays a crucial role in the global climate system. The Amazon Rainforest, also known as the "Lungs of the Earth," covers a large portion of this basin and is home to numerous unique species of plants and animals.
This region is critical for maintaining the balance of the Earth's ecosystems and serves as an important resource for scientific research and conservation efforts. Overall, Brazil is the country where the Amazon River concludes its remarkable journey.
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which region is quickly becoming uninhabitable by humans because of global warming? question 37 options: a. the us northwest b. the arctic c. equatorial regions d. china
Answer:
C. Equatorial regions
the most biologically productive part of a salt marsh would be thea. barrier flat.b. dune.c. lagoon.d. low marsh.
The most biologically productive part of a salt marsh would be the low marsh.
The low marsh is the area of the salt marsh that is regularly flooded by the tides. It is characterized by a high level of salinity and frequent inundation, creating ideal conditions for the growth of salt-tolerant plants and the development of a diverse array of organisms.
The low marsh is rich in organic matter and nutrients, which support a high level of primary productivity. These productive areas serve as nurseries and feeding grounds for a variety of organisms, including fish, crustaceans, and birds. The dense vegetation in the low marsh provides shelter, nesting sites, and food sources, contributing to its overall importance in the salt marsh ecosystem.
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COULD CLIMATE CHANGE CHANGE THE
THERMOHALINE CIRCULATION SYSTEM?
WHY OR WHY NOT?
Although a thermohaline circulation shutdown and consequent localized cooling are possible effects of global warming, the new Ice Age will not emerge from it since the Earth would continue to warm as a consequence of greenhouse gas emissions.
Long known as potentially unstable, the ocean's thermohaline circulation has been implicated as a possible factor in rapid climate change in all timeframes of decades and longer. The basic mechanisms behind thermohaline circulation alterations are still poorly understood.
The ocean warms melting sea ice as Earth's temperature warms. The water may become less chilly and less inclined to sink as a result of the warming. The ocean currents may slow down or perhaps cease in certain locations if there was no cold water sinking.
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how are spits and baymouth bars formed? sand is deposited partly or completely across an inlet or bay by beach drift and longshore currents wave erosion cuts away both sides of a long sand bar, leaving a sand ridge aligned parallel to the shore a headland is eroded, leaving behind a ridge of sand sand eroded from a wave-cut cliff is deposited around sea stacks and arches
Spits and baymouth bars are formed through the deposition of sand and other sediments by longshore currents, beach drift, and wave action.
A spit is a long, narrow ridge of sand or gravel that extends from the mainland into a body of water. It is formed by the deposition of sediment by longshore currents and beach drift, which transport sand along the shoreline. As the sediment is deposited, it gradually builds up and extends further out into the water. Spits are often curved or hooked at the end, due to changes in the direction of the currents or changes in wave energy.
A baymouth bar is a sandbar that completely or partially blocks the entrance to a bay or lagoon. It is formed when sediment is deposited across an inlet or bay by longshore currents and beach drift, creating a barrier that separates the bay from the ocean. The bar can be formed from a combination of both erosion and deposition, as wave action cuts away at both sides of a long sand bar, leaving a sand ridge aligned parallel to the shore.
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describe a potential solution or technique that can prevent or reduce degradation of agricultural land.
Adopting sustainable agriculture methods is one possible way to stop or slow down the degradation of agricultural land.
By employing practises that safeguard the environment, public health, and animal welfare while simultaneously maintaining economic sustainability, sustainable agriculture seeks to meet the needs of both the present and future generations.
Conservation Agriculture: Crop rotation, permanent soil cover maintenance, and minimal soil disturbance are all components of conservation agriculture. This improves soil fertility and structure, lessens erosion, and increases soil's ability to hold water.
The rotation of crops, biological controls, and chemical controls are just a few examples of the approaches that are used in integrated pest management (IPM) to control pests. This lessens the amount of pesticides used and the damaging effects they have on the environment.
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which of the following countries does brazil not share a border with? a.paraguay b.venezuela c. chile d. bolivia e.argentina
Answer:
Brazil does not share a border with Chile.
C is the correct answer.
Chile.Brazil does not share a border with Chile.
Brazil shares a border with Paraguay, Venezuela, Bolivia, and Argentina. However, it does not share a border with Chile. Chile is located to the southwest of Argentina, separated by the Andes Mountains.
The conclusion is that Brazil does not share a border with Chile. This means that there is no direct land boundary between Brazil and Chile. While Brazil shares borders with several other South American countries, such as Paraguay, Venezuela, Bolivia, and Argentina, Chile is not one of them. The absence of a border between Brazil and Chile implies that these two countries do not have a common land boundary.
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based on the historic record, is month in which a deadly hurricane is most likely to make landfall in the united states.
Historically, the months of August and September are the most likely months for deadly hurricanes to make landfall in the United States.
This is due to a combination of warm ocean temperatures and atmospheric conditions that create favorable conditions for hurricane formation and strengthening. Additionally, the peak of hurricane season typically occurs in mid-September. However, it's important to note that hurricanes can and have occurred outside of these months, so it's important to always be prepared and stay informed during hurricane season.
This is because September falls within the peak of the Atlantic hurricane season, which runs from June 1 to November 30, with the highest concentration of storms occurring between mid-August and late October.
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The eye of a hurricane has all of the following characteristics, except_____; and ______ is turning as a result of the Earth’s rotation about its axis. (Select answer that is completely true).
heavy rain: planetary vorticity relatively clear skies; relative vorticity light winds; absolute vorticity descending air; the spinning top hypothesis
The eye of a hurricane has all of the following characteristics, except heavy rain; and it is turning as a result of the Earth’s rotation about its axis. The correct options to complete the statement are relatively clear skies and relative vorticity.
The center of a hurricane has a calm zone of low pressure known as the eye. It is distinguished by light winds, relatively clear skies and descending air. However the surrounding eyewall experiences storm surge, powerful winds, and heavy rain.
The Coriolis effect which is caused by the Earth's rotation about its axis, is what causes hurricanes to turn. As a result the hurricane begins to rotate in the Southern Hemisphere in a clockwise direction and the Northern Hemisphere in a counterclockwise direction. Relative vorticity is a term used to describe this rotation.
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the zone of ocean water where photosynthetic organisms have enough light to thrive is called the ____. a. disphotic zone b. mesopelagic zone c. euphotic zone d. aphotic zone
The zone in the ocean where photosynthetic organisms can thrive due to sufficient light is called the euphotic zone (option c).
The euphotic zone is the uppermost layer of the ocean where sunlight penetrates sufficiently to support photosynthesis. In this zone, the water is well-illuminated, allowing photosynthetic organisms such as phytoplankton to receive the necessary light energy for their growth and productivity. These organisms convert sunlight, carbon dioxide, and nutrients into organic matter through photosynthesis, forming the base of the marine food chain. The depth of the euphotic zone can vary depending on factors like water clarity, the presence of dissolved substances, and the angle of sunlight.
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primary sources of so2 emissions are question 1 options: A. fossil-fuel burning B. power plants and refineries
C. heavy-duty trucks and buses
D. light-duty trucks and automobiles E. commercial aircraft
The primary sources of SO2 emissions are: A. Fossil-fuel burning: SO2 is produced when fossil fuels, such as coal, oil, and natural gas, are burned for energy generation in various industrial, residential, and commercial processes.
B. Power plants and refineries: Power plants and refineries that burn fossil fuels are significant sources of SO2 emissions due to the combustion of coal, oil, and other fossil fuels for electricity generation and industrial processes. C. Heavy-duty trucks and buses: While heavy-duty vehicles can emit pollutants, including SO2, their contribution to overall SO2 emissions is relatively lower compared to other sources.
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why are lava flows typically finer-grained than intrusive igneous rocks?
Lava flows are typically finer-grained than intrusive igneous rocks due to differences in their cooling rates and crystal growth.
Lava flows result from the extrusion of molten rock onto the Earth's surface during volcanic eruptions. When lava is exposed to a relatively cooler surface environment, it cools and solidifies rapidly. The quick cooling prevents sufficient time for large crystals to form, resulting in a finer-grained texture. The rapid cooling of lava allows for the formation of small crystals or even glassy textures in some cases. In contrast, intrusive igneous rocks form when magma cools slowly beneath the Earth's surface. The slower cooling rate allows for the growth of larger crystals as the magma has more time to solidify. This results in the formation of coarse-grained textures in intrusive rocks.
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why does the rainshadow desert form on the downwind side of the mountains?diagram of moist air masses being forced over a mountain range. there is a desert on the downwind side of the mountains.why does the rainshadow desert form on the downwind side of the mountains?the air mass has absorbed all the moisture on that side as it descended.the sediments on the downwind side are porous.the mountains block wind from that region, making it hot.the moisture was precipitated from the air mass on the upwind side.photo of a rock that has been gouged by an overriding glacier.what evidence of glacial erosion is visible in this image?crevassesfaultsoutwashstriationshow do deep-ocean trenches form?two tectonic plates diverge and create a rift valley.sediments from turbidity current settle out in a deep-ocean basin.subducting lithosphere descends into the mantle.magma from a partially melting tectonic plate makes its way through the crust.
The rainshadow desert form on the downwind side of the mountains as the moisture was precipitated from the air mass on the upwind side. The right answer is e.
When high mountain ranges prevent clouds from reaching regions in the direction of the wind, rain shadow deserts are created. The air cools and condenses as it passes over the mountains, resulting in precipitation on the upwind side. A desert results from the mountain's downwind side receiving nearly no moisture.
A region known as a "rain shadow" is one that was compelled to turn into a desert because nearby mountain ranges prevented any rainy, plant-growing conditions. Rain and snow are dropped on one side of the mountain by wet weather systems. All of the precipitation is prevented on the mountain's other side, which is known as the rain shadow side.
The correct answer is option e.
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The question seems incomplete. The complete question is:
why does the rainshadow desert form on the downwind side of the mountains?
there is a desert on the downwind side of the mountains.
the air mass has absorbed all the moisture on that side as it descended.
the sediments on the downwind side are porous.
the mountains block wind from that region, making it hot.
the moisture was precipitated from the air mass on the upwind side.
an ef-3 tornado has faster wind speeds than a category 3 hurricane. group of answer choices true false
The statement "ef-3 tornadoes have higher wind speeds than category 3 hurricanes" is false because Category 3 hurricanes have higher wind speeds than his EF-3 tornadoes. Wind speeds associated with different tornadoes and hurricanes are classified using different scales.
Enhanced Fujita (EF) scale for tornadoes; Saffir-Simpson Hurricane Wind scale for hurricanes. An EF-3 tornado on the EF scale is characterized by estimated wind speeds ranging from 136 mph (218 km/h) to 165 mph (266 km/h). Category 3 hurricanes on the Suffer-Simpson Scale, on the other hand, are characterized by sustained wind speeds between 111 mph (178 km/h) and 129 mph (208 km/h).
As you can see, the wind speed of an EF-3 tornado is lower than that of a Category 3 hurricane. Therefore, it is incorrect to say that EF-3 tornadoes have higher wind speeds than category 3 hurricanes.
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Write a m in front of the mixtures and put a s in front of the solutions sugar water concrete jelly beans salt and sugar metel alloys
and gases
Mixture:
mSugar water, mConcrete, mJelly beans, mSalt and sugar, mMetal alloys, mGases
Solution:
sSugar water
A result is a type of admixture in which one substance( the solute) is slightly dispersed throughout another substance( the detergent). results can be formed between solids, liquids, or feasts. In a result, the solute patches are generally veritably small and don't settle out over time. exemplifications of results include saltwater and sugar water.
In terms of memorandum, the prefix" m" is frequently used to indicate a admixture, while the prefix" s" is frequently used to indicate a result. For illustration," mJelly sap" indicates a admixture of different types of jelly sap, while" sSugar water" indicates a result of sugar dissolved in water.
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location of tropical cyclone Freddy in Mozambique
Answer:
the seaport of Quelimane in Zambezia province, Mozambique,
Explanation:
The location of tropical cyclone Freddy is the seaport of Quelimane in Zambezia province, Mozambique.
They are characterized by strong winds and heavy rainfall. They can often result in storm surges and flooding. The winds in a cyclone rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Cyclones go through different stages of development, starting as tropical disturbances and progressing into tropical depressions, tropical storms, and eventually, if the conditions are favorable, into a full-fledged cyclone with sustained winds reaching a certain threshold.
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the worldwide conditions of temperature, atmospheric pressure, humidity, wind, and precipitation are called . a) global climate b) weathering c) ozone d) continental drift e) r-to-c ratio
The global state of temperature, pressure, humidity, wind, and precipitation is known as weathering.
Option b is correct .
Weathering refers to physical, chemical, and biological processes that affect rocks and minerals at or near the surface of the earth. It is independent of global conditions such as temperature, pressure, humidity, wind and precipitation.
Weather describes the daily variations in temperature, pressure, humidity, wind patterns, and precipitation that occur in a particular location or region. These conditions can change rapidly and are influenced by a variety of factors such as insolation, air mass, ocean currents and topography. Meteorologists study and forecast weather patterns to provide information about short-term atmospheric conditions.
Hence, Option b is correct .
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what is the definition of turbidity current? what is the definition of turbidity current? focused jet of water blasting across the shelf from a surface stream submarine landslide subsidence of the seafloor fast-moving water created by density differences
A fast-moving stream of water that carries sediment and suspended matter in a dense sediment-laden stream.
Turbulence usually arises from density differences between the sediment-laden water and the surrounding water. These flows can occur in a variety of aquatic environments such as rivers, lakes, and oceans, often from sources such as river runoff, underwater landslides.
Resuspension of sediments to the seafloor. caused by the sediment influx of Turbid currents can transport large amounts of sediment, cause erosion and deposition, shape underwater landscape morphology, and influence sediment distribution in marine environments.
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what desert landform is visible here? photo of overlapping aprons of sediment spilling out of the mountains onto a plain. what desert landform is visible here? inselberg normal fault playa lake bajada
The desert landform visible in the photo is a bajada.
What is bajada?A bajada is a sloping plain that forms when multiple all/uvial fans converge at the base of a mountain range
All/uvial fans are formed when sediment and debris eroded from mountains and hillsides are deposited onto a plain, forming a fan shaped deposit.
As the all/uvial fans merge together they create a long, continuous slope or plain that gently slopes away from the mountains The overlapping aprons of sediment seen in the photo are characteristic of a bajada.
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Which stratigraphic principle is most frequently used to determine relative age among different kinds of geologic events?
a. Cross-cutting relations
b. Fossil succession
c. Superposition
d. Original horizontality
e. Lateral continuity
The stratigraphic principle most frequently used to determine relative age among different kinds of geologic events is c. Superposition.
Superposition is the principle that states that in undisturbed layers of sedimentary rocks, the oldest rocks are found at the bottom, while the youngest rocks are located at the top. This principle is based on the assumption that sedimentary layers are deposited horizontally over time, with each new layer forming on top of the previous layers.
By observing the order of rock layers and their relative positions, geologists can establish a relative age sequence. They can determine which layers are older or younger based on their position within the sequence. This allows for the relative dating of events, such as the deposition of different sedimentary layers or the formation of various geological features.
While other stratigraphic principles like cross-cutting relations, fossil succession, original horizontality, and lateral continuity are also valuable in determining relative age, superposition is particularly useful and widely applied in establishing the relative chronological order of geologic events.
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Analysis and synthesis of data about drainage basin