Crevasses form in the zone of fracture below the terminus of an iceberg. This occurs when an iceberg starts to move down a valley, sliding on the water's surface and encountering different levels of friction. This causes the ice to break and split, creating a crevasse.
Crevasses can also form due to glacier movements and as a result of stress in the ice. As a glacier slides down a valley, it picks up rocks and sediment, causing an uneven surface. This unevenness increases the friction on the glacier, resulting in crevasses. Additionally, stress from water pressure, the weight of the glacier, or winds and currents can cause crevasses.
Crevasses are deep, jagged cracks in glaciers, ranging from a few centimeters to tens of meters deep. They are often difficult to detect, and can be hazardous to anyone crossing them, as they can easily be hidden beneath snow or ice.
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a flood in an unmodified stream will deposit sediment outside the normal stream banks on the floodplain. when levees are constructed to confine floods, the sediment is deposited in the stream channel, which means that
When levees are constructed to confine floods, sediment is no longer deposited outside the normal stream banks on the floodplain, but is instead deposited in the stream channel. This is because the levees prevent flooding, and therefore the sediment is deposited within the stream channel instead.
When the stream channel is confined by levees, the natural flow of water is disrupted, and the sediment that would typically be deposited on the floodplain is instead forced to settle in the stream channel.
Over time, this can cause the stream channel to become shallower, narrower, and more susceptible to flooding due to a reduced capacity to hold water. This can also lead to the formation of sandbars and other sediment deposits in the channel.
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sediments are small rocks fragement such as sand or pebbles . what evidence do you see that sediments are being transported?
Evidence of sediment being transported can be seen in a variety of ways. For example, when you look at a beach, you can see that the sand has been moved and shifted. This is due to the waves and wind that cause the sand to be pushed around.
Another way to see evidence of sediment being transported is during a flood. During a flood, large rocks and other debris can be seen being carried away by the rushing water. This is because the water has the power to move larger pieces of sediment than the wind or waves. Sediment can also be seen being transported by glaciers.
As glaciers move, they pick up rocks and other sediment and move it with them. This can be seen when looking at the moraines created by glaciers as they move. In short, sediment can be seen being transported in a variety of ways, from waves and wind on the beach to glaciers and flooding.
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which is true of air flowing into low pressure center? which is true of air flowing into low pressure center? air converges and ascends. air diverges and ascends. air converges and descends. air diverges and descends. the air movement is called anticyclonic.
A low pressure center's airflow congregates and ascends. Cyclic movement is referred to as such. Air rises as a result of the low pressure area that is produced as the air converges.
Clouds and precipitation may form as a result of this rising air. In contrast, clear and dry circumstances result when air moving out of a high pressure center diverges and descends. Understanding these dynamics is crucial for forecasting and predicting weather conditions because air movement into and out of pressure centers plays a significant effect in weather patterns.A zone of low pressure that can result in cloud formation and precipitation is created when air flowing towards a low pressure center converges and ascends. The air flows out of a high pressure center, diverges, and descends; this movement, known as cyclonic, is the opposite of anticyclonic movement.
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wildfires may spread in three ways: slowly along the ground, as a wall of fire along a flaming combustion front, or as a(n
Wildfires may spread in three ways slowly along the ground, as a wall of fire along a flaming combustion front, or as a crown fire.
A wildfire is an uncontrollable fire that burns in the wilderness. It is sometimes referred to as a forest fire, bushfire, or grass fire because it typically happens in wooded areas, grasslands, and shrublands. Three ways in which wildfires can spread are mentioned below:Slowly along the ground:
The fire creeps slowly along the ground, burning up dead leaves, branches, and twigs. It is the slowest mode of propagation, with an average speed of 0.5 mph.Wall of fire: When a combustible substance is ignited, the fire spreads in the form of a wall of flames. When a fuel source is present, the fire spreads faster and with greater intensity.
Crown fire: It occurs when the flames reach the treetops. It may be caused by windborne embers, spotting, or surface fire that progresses upward. Crown fires can spread rapidly, spreading embers over a considerable distance.
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what is the interpreted plate motion direction for the pacific plate for the time period between the formation of kauai and the big island of hawaii
Interpreted plate motion direction for the Pacific plate for the time period between the formation of Kauai and the Big Island of Hawaii is northwest, as it moves over the Hawaii hotspot.
Plates on Earth’s lithosphere have been in motion since the creation of the planet, and the movement of plates causes numerous geological phenomena, including mountain formation, volcanic eruptions, and earthquakes.
The Pacific Plate, on the other hand, has moved in various directions in recent geological history, including northward, southeastward, and westward. The direction of motion of the Pacific Plate is northwest over the Hawaii hotspot, resulting in the creation of the Hawaiian Islands.
The interpretation of plate motion helps scientists to understand the past motion of plates, present geological phenomena, and future outcomes of plate tectonics.
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explosive volcanoes tend to occur at which type of plate boundary?
Explosive volcanoes tend to occur at convergent plate boundaries.
Volcanoes that erupt explosively are known as explosive volcanoes.
These volcanoes eject ash, gas, and rocks high into the air during their eruptions, resulting in the formation of pyroclastic flows, which are dense collections of hot ash, rock fragments, and gas that flow down the slopes of the volcano.
A boundary where two tectonic plates come together and interact is known as a convergent plate boundary.
Convergent plate boundaries are characterized by the fact that one plate is typically forced beneath the other as they collide, resulting in the formation of a subduction zone.
Explosive volcanoes tend to occur at convergent plate boundaries. At convergent plate boundaries, two plates come together, and one is forced beneath the other.
When the lower plate sinks into the hot mantle, it causes melting, and this molten rock rises to the surface, forming a volcano.
The most explosive volcanoes are those that occur at subduction zones because the magma that rises to the surface is rich in water and other volatile elements, making it more explosive when it reaches the surface.
Some examples of explosive volcanoes include Mount St. Helens in the United States, Mount Fuji in Japan, and Mount Pinatubo in the Philippines.
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which factor will increase the salt concentration in seawater? responses precipitation precipitation evaporation evaporation runoff runoff ice cap melting
Evaporation is the factor that will increase the salt concentration in seawater.
Seawater is primarily made up of water and dissolved salts. Salts come from the weathering of rocks on land and volcanic activity on the seafloor.
When seawater evaporates, the water is removed, but the salts remain, resulting in an increase in salt concentration.
The salt concentration in seawater is measured in parts per thousand (ppt) or salinity, and it varies depending on where you are in the world. Salinity levels can range from 32 to 37 ppt.
The salinity of seawater also varies depending on the temperature, pressure, and amount of dissolved gases in the water.
Seawater is denser than freshwater because of its high salt content.
Because saltwater is denser than freshwater, it tends to sink beneath it, which causes ocean currents.
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Answer: THE ANSWER IS D) Evaporation
Explanation: I GOT A 100 ON THE 3 QUESTION QUIZ
What evidence of low rainfall is shown on topographic map in geography grade 12
Answer:
when the map is blue
Explanation:
Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. USGS topographic maps also show many other kinds of geographic features including roads, railroads, rivers, streams, lakes, boundaries, place or feature names, mountains, and much more.
the volcanic islands visible here formed as a result of a mantle plume. which volcanic island is the oldest and subsiding into the sea?
The volcanic island that is the oldest and subsiding into the sea is the Hawaiian Islands. The Hawaiian Islands, the volcanic islands visible in the image provided, were formed as a result of a mantle plume.
The Hawaiian Islands are a chain of volcanic islands in the Pacific Ocean that were formed from volcanic activity over millions of years. The islands were formed by the Hawaiian hot spot, which is an area where magma from the Earth's mantle reaches the surface.
In terms of age, the Hawaiian Islands are the oldest of the volcanic islands visible in the image provided. Furthermore, the oldest of the Hawaiian Islands is Kauai, which is also the one that is subsiding into the sea.
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state one similarity and one difference in life expectancy in developed and developing countries
One similarity in life expectancy between developed and developing countries is that people tend to live longer in both types of countries compared to historical periods.
One difference in life expectancy between developed and developing countries is that there is often a significant gap in life expectancy between the two.
How do developed and developing countries compare in life expectancy ?Developed countries generally have higher life expectancies than developing countries due to factors such as greater access to healthcare, higher standards of living, and better infrastructure. In some cases, this gap can be quite large, with people in developed countries living many years longer on average than people in developing countries.
However, it is worth noting that the gap in life expectancy between developed and developing countries has been decreasing over time as developing countries continue to make progress in improving healthcare and other factors that contribute to longer lifespans.
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The __________ Divide separates the water that flows into the Gulf of Mexico on its way to the Atlantic Ocean from the water that flows into the Pacific Ocean.
The Rocky Mountains divide separates the water that flows into the Gulf of Mexico on its way to the Atlantic Ocean from the water that flows into the Pacific Ocean.
What is Rocky Mountain?Rocky Mountain is a long mountain range situated in North America that stretches around 4,800 kilometers (3,000 miles) from New Mexico, the United States, to British Columbia, Canada. The Rocky Mountains, also known as the Rockies, have a height of up to 4,401 meters (14,440 feet).The Rocky Mountains are a major range of mountains in western North America.
What are the Rocky Mountains like?The Rocky Mountains feature a variety of terrains and environments, including forests, valleys, tundras, glaciers, and plains. These environments house a diverse array of flora and fauna, such as elk, deer, and mountain lions. The Rocky Mountains are also home to several national parks, including Yellowstone National Park and Rocky Mountain National Park.
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black smokers in the bottom of the ocean are evidence of active hydrothermal metamorphism. group of answer choices true false
Yes, black smokers in the bottom of the ocean are evidence of active hydrothermal metamorphism. Hydrothermal metamorphism is a process of geologic transformation that occurs when hot, mineral-rich water circulates through rock formations.
Black smokers are large chimney-like structures created by hydrothermal vents, which form when the hot water mixes with cold seawater. The chimneys are composed of metal-rich minerals that are created when the hot water interacts with the ocean floor. These minerals give the chimneys a black color, thus the name black smoker.
The presence of these structures in the ocean floor indicates that hydrothermal metamorphism is still alive and well. The mineral-rich water that is released from the chimneys is also responsible for the formation of new minerals and the alteration of existing ones. Thus, the presence of black smokers is an indication of active hydrothermal metamorphism.
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a sandstone bed strikes 140 across a stream. the tresam flows down a narrow gorge with vertical walls. the apparent dip of the bed on the walls of the gorge is 25, 095. what is the true dip of the bed?
Answer : The true dip of that sandstone bed is 25°95'.
The apparent dip of the bed on the walls of the gorge is the angle that the bed strikes across the stream and down the narrow gorge. we calculate the angle of the bed relative to the horizontal plane. The true dip is the angle of inclination of the bed below the horizontal plane.
True dip = 90° - (90° - 25°95') = 25°95'. the true dip of the sandstone bed is 25°95', which is the angle of inclination of the bed below the horizontal plane.
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_______________ form when more resistant rock does not erode and less resistant rock on each side does.
Rock Formation form when more resistant rock does not erode and less resistant rock on each side does.
What is a Rock Formation?Rock formations are the result of a geological process that causes rock to break, crack, erode, and form new structures. Rocks are constantly being formed, eroded, and recycled through the rock cycle, but some rocks are more resistant to erosion than others. The more resistant rocks, such as granite, sandstone, or limestone, can resist erosion and weathering, while less resistant rocks, such as shale, clay, or sand, erode more easily. This results in the formation of various landforms, including buttes, mesas, spires, arches, and cliffs.
Rock formations can take millions of years to form and are shaped by a combination of geological processes such as tectonic activity, erosion, weathering, and deposition. They can be found all over the world and provide valuable information about the earth's history and geology.
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The Labrador Current not only brings
cold water south -it brings icebergs
from the Greenland ice sheet. Perhaps
the most famous marine tragedy of all
time happened because of this. What
happened? When did it happen?
Answer:
The marine tragedy being referred to is the sinking of the RMS Titanic, which hit an iceberg on its maiden voyage and sank on April 15, 1912.
The Labrador Current flows southward along the coast of Newfoundland and Labrador, bringing with it icebergs that have calved off the Greenland ice sheet. The Titanic was sailing through this region when it struck an iceberg that had drifted into its path, causing extensive damage to the ship's hull and leading to its sinking.
The tragedy resulted in the loss of more than 1,500 lives and is considered one of the deadliest peacetime maritime disasters in history.
mars's seasonal winds are driven primarily by group of answer choices dust vaporization of carbon dioxide ice. vaporization of water ice. changes in air pressure due to volcanic activity.
The seasonal winds on Mars are primarily driven by changes in air pressure due to volcanic activity.
The most important factor controlling the winds is the variation in pressure that is caused by the varying amounts of carbon dioxide, dust, and water ice in the atmosphere. During the Martian year, the atmospheric pressure can change drastically, as the air warms and cools over the course of a Martian year. The changes in pressure cause winds to blow from higher-pressure regions to lower-pressure regions. This pressure difference causes dust storms, as well as the polar winds which can be seen in images of the Martian surface. The amount of vaporization of carbon dioxide and water ice can also affect the wind speeds, but the main factor remains the pressure difference.
In conclusion, the seasonal winds on Mars are primarily driven by changes in air pressure due to volcanic activity. This pressure difference is caused by varying amounts of carbon dioxide, dust, and water ice in the atmosphere, resulting in dust storms and polar winds. The vaporization of carbon dioxide and water ice can also contribute to wind speed, but the main factor remains the pressure difference.
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infer why weather ahead of a warm front might be colder and rainier than weather ahead of a cold front
The weather ahead of a warm front is typically colder and rainier than the weather ahead of a cold front because of the differences in the air masses that move ahead of each type of front.
A warm front is typically preceded by a warm air mass, which is generally more humid than a cold air mass. This warm, humid air is unstable, meaning it rises quickly and creates large amounts of precipitation in the form of rain or snow.
The cold front, on the other hand, is usually preceded by a cold, dry air mass, which is more stable than the warm air mass, meaning it rises more slowly and causes much less precipitation.
As the warm air mass rises, it also cools, creating colder temperatures ahead of the warm front. Therefore, the weather ahead of a warm front is typically colder and rainier than the weather ahead of a cold front.
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which of the following are geologic settings where travertine can form? choose one or more: a. in glacial lakes b. in caves c. in fast-moving rivers d. near hot springs e. in swamps
Travertine can form in a variety of geologic settings, including in caves, near hot springs, and in fast-moving rivers. Therefore the correct option is option A, B and C.
In caves, travertine forms as a result of carbon dioxide in the air dissolving in water. This results in an increase in the acidity of the water, which in turn dissolves the rock the cave is made of and deposits the resulting sediment in the form of travertine.
Near hot springs, the water is saturated with dissolved minerals such as calcium carbonate, which can also be deposited in the form of travertine.
In fast-moving rivers, the increased turbulence can cause the suspended sediment in the water to become trapped and deposited in the form of travertine.
Travertine can also form in glacial lakes, but not in swamps.
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if quartz is present in an igneous rock, what composition must it be?group of answer choicesultramaficmaficintermediatefelsic
If quartz is present in an igneous rock, it must be of felsic composition.
Igneous rocks are formed from solidification and cooling of lava or magma. Magma is a molten material beneath the Earth's surface. If it cools and solidifies inside the Earth, it forms plutonic rocks. If it cools and solidifies on the surface, it forms volcanic rocks.Igneous rocks are further divided into four main groups depending on their chemical composition. The four groups are as follows: Ultramafic, Mafic Intermediate and Felsic.
Each group is determined by the proportion of minerals present in the rock. The amount of silica present in the rock is used to determine the groups. Felsic rocks contain the most silica while ultramafic rocks contain the least silica. Mafic rocks have an intermediate silica content while intermediate rocks have a silica content that is between that of felsic and mafic rocks.Quartz is a mineral that is rich in silica. Therefore, if quartz is present in an igneous rock, it must be of felsic composition.
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A __________ is one that is at the lowest edge of a large glacier and where the glacier ends. They can be very large glacial landforms.
Answer:
A glacier terminus or a glacier snout is at the lowest edge of a large glacier where the ice ends. Glacial termini can be very large and may form prominent landforms such as terminal moraines, which are ridges of sediment and rock that mark the furthest extent of the glacier's advance.
A terminal moraine is one that is at the lowest edge of a large glacier and where the glacier ends. They can be very large glacial landforms.
When a glacier begins to recede or melt, terminal moraines are typically produced as the glacier's front reaches the valley floor. The terminal moraine is created as a result of the accumulation of till or other debris that has been transported and deposited by the glacier's ice.
Terminal moraines can vary in size and shape, and they can have a significant impact on the landscape in which they are located. They can be used to define the extent of an ice sheet or a glacier at any given time in the past, and they can be used to assist in understanding past climate patterns.
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The greater the slope, the _____ the runoff.
The greater the slope, the faster the runoff.
What is a slope?Slope is a measure of the steepness of a surface. The slope of a surface is the amount of change in height divided by the amount of change in distance. The slope of a surface is determined by comparing the height of two points on the surface to the distance between them.
What is runoff?Water that flows over the ground surface, as opposed to infiltrating the ground, is referred to as runoff. It occurs when the ground is unable to absorb water from rainfall or other forms of precipitation. Runoff is one of the main sources of surface water pollution in the United States.Therefore, the greater the slope, the faster the runoff. It's because water is more likely to flow downhill faster when the slope is greater.
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As atmospheric CO2 increases, it traps the heat in the atmosphere; this is called the __________ effect.
As atmospheric CO2 increases, it traps the heat in the atmosphere; this is called the greenhouse effect.
As atmospheric CO2 increases, it traps the heat in the atmosphere; this is called the greenhouse effect.
What is the Greenhouse Effect?The Greenhouse Effect refers to the process by which the earth's atmosphere traps the heat from the sun and keeps it from being lost to space. The gases that create this effect are called "greenhouse gases," and they include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. While some of these gases are produced naturally, others are human-made. There are many factors that can affect the level of greenhouse gases in the atmosphere, including industrialization, deforestation, and population growth.
As greenhouse gases accumulate in the atmosphere, they can trap more and more heat, leading to a phenomenon known as "global warming." This can have far-reaching effects on the planet, including rising sea levels, increased frequency and severity of storms, and changes in precipitation patterns.
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the richter magnitude of an earthquake is determined from the .group of answer choicesintensity of the earthquakearrival time of p and s wavesarrival time of p and surface wavesduration of the earthquake
The Richter magnitude of an earthquake is determined from the arrival time of P and S waves. Therefore the correct option is option B.
The Richter magnitude scale is a measure of an earthquake's size that assigns a single number to the amount of seismic energy released. Earthquakes are classified according to their magnitude, and the Richter magnitude scale is one of several scales used to do so. The Richter scale was developed by Charles F.
Richter, an American seismologist. The Richter scale, which ranges from 1 to 10, is a logarithmic scale.
Therefore, each whole number increase in magnitude represents a tenfold increase in seismic energy. To summarize, the Richter magnitude of an earthquake is determined from the arrival time of P and S waves.
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The following question may be like this:
The Richter magnitude of an earthquake is determined from the .group of answer choices
intensity of the earthquakearrival time of p and s wavesarrival time of p and surface wavesduration of the earthquakewhat are the differences in a-type tropical climate precipitation patterns? match the climate to its precipitation pattern.
A-type tropical climate is characterized by having a wet season with heavy rainfall, and a dry season with little precipitation. The precipitation pattern in the wet season is mainly caused by convectional rainfall, while in the dry season, the pattern is mainly due to global circulation.
The wet season in the A-type climate is characterized by heavy and intense rainfall, with most of the precipitation occurring in short bursts. This is due to the high humidity and warm temperature of the air, which leads to strong updrafts and convective storms. During the dry season, global circulation patterns are more dominant and rainfall is much lighter and more spread out.
In summary, the A-type tropical climate has a distinct precipitation pattern, where the wet season is characterized by intense, convectional rainfall and the dry season is characterized by lighter, global circulation-driven rainfall.
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calcite is the main mineral constituent of the sedimentary rock limestone and of the metamorphic rock marble. true false
The given statement “Calcite is the main mineral constituent of the sedimentary rock limestone and of the metamorphic rock marble” is true.
What is calcite?Calcite is a mineral that is composed of calcium carbonate, which is found in many forms, including marble, limestone, and chalk. Calcite is a common mineral and is found in large quantities all over the world. It can be found in many colors, including white, gray, yellow, green, pink, blue, and black, and it is often used in construction and manufacturing processes.Limestone and marble:Limestone is a sedimentary rock that is composed mainly of calcium carbonate (CaCO3), which is often derived from the accumulation of marine shells and skeletons.
Marble is a metamorphic rock that is formed when limestone is subjected to heat and pressure over time.Both limestone and marble contain a high percentage of calcite, which is why they are both considered to be calcareous rocks. Calcite makes up the majority of the mineral content in these rocks and is responsible for their distinctive physical and chemical properties.
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which mining process uses heavy equipment to dig holes to remove ores, as well as sand, gravel, and stone? dredging heap leaching open-pit mining strip mining
The strip mining process uses heavy equipment to dig holes to remove ores, as well as sand, gravel, and stone. The correct option is d.
Strip mining is a process that uses heavy equipment to remove ores, sand, gravel, and stone from the earth. It involves digging a large trench and removing the material layer by layer, until the desired material is exposed. The correct option is d.
The material is then hauled away and processed. Strip mining is often used to mine coal and tar sands, and is used when the material is too deep to access by open-pit mining.
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chemical sedimentary rocks are classified (named) based on the . group of answer choices grain sizes of the detrital particles degree of compaction and lithification colors of the cementing minerals mineral composition
Chemical sedimentary rocks are classified based on the mineral composition of the rock.
This classification is based on the minerals that make up the rock, as the minerals provide clues to the environment of deposition. The mineral composition of the rock is determined by the grain sizes of the detrital particles, degree of compaction and lithification, and colors of the cementing minerals.
Grain size is an important factor in determining the mineral composition of a rock. Detrital particles that make up the rock will range from fine-grained (clay-sized particles) to coarse-grained (pebble-sized particles).
Coarse-grained particles are more likely to form mineral grains such as quartz, feldspar, and mica, while finer-grained particles are more likely to form clays.
The degree of compaction and lithification are also important in determining the mineral composition of a rock. Compaction is the process of squeezing and rearranging particles together and lithification is the process of changing loose sediment into solid rock.
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a major driving mechanism of the moc is the sinking of water in the north atlantic. this begins with the formation of . as ocean water freezes, ice crystals exclude salt and the salinity of the surrounding water increases.
The major driving mechanism of the MOC (Meridional Overturning Circulation) is the sinking of water in the North Atlantic.
This begins with the formation of sea ice. As ocean water freezes, ice crystals form and the salt that is excluded from the crystals increases the salinity of the surrounding water, which causes it to become denser and sink.
Meridional Overturning Circulation (MOC) is a north-south (meridional) overturning circulation in the sea calculated by zonal accumulation (east-west) of the amount of water mass transport in depth or density layers.
This somersault circulation occurs in the North Atlantic, away from the subpolar regions, the MOC (which is in principle an observable quantity) is often identified with the thermohaline (THC) circulation, which is more of a conceptual interpretation.
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which of the following problems is directly associated with irrigation? i. fishery collapse ii. waterlogging iii. salinization
Irrigation is directly associated with the problem of salinization. Salinization occurs when the soils and groundwater become saltier due to irrigation.
Irrigation is directly associated with which of the following problems?
The other problems, fishery collapse and waterlogging, are not directly related to irrigation.
Fishery collapse is related to overfishing and pollution in the water bodies, whereas waterlogging occurs when the soil is saturated with water and lacks proper drainage.
What is irrigation?Irrigation is the process of applying water to plants or crops to help them grow in a dry or semi-dry area.
It is typically used in areas where rainfall is scarce, or where the water supply is insufficient to meet the needs of the crops or plants grown in the region.
Irrigation can help improve agricultural yields and ensure food security in regions where the population relies on agriculture as the main source of livelihood.
However, it can also lead to various problems, including salinization, depletion of groundwater, and soil erosion.
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what kind of drainage pattern would develop on the slopes of mount rainier, an isolated volcano in washington state? dendritic radial rectangular trellis
Answer: The kind of drainage pattern that would develop on the slopes of Mount Rainier, an isolated volcano in Washington State, is radial.
Explanation:
What is a drainage pattern?
A drainage pattern refers to the design that is created by the flowing water. When water flows, it creates several channels, and the combination of all these channels forms a drainage pattern.
What is a radial drainage pattern?
A radial drainage pattern refers to a type of drainage pattern that occurs when streams flow in all directions outward from a central peak or dome-like structure. In this kind of drainage pattern, the streams flow in straight lines, and they follow the slopes of the land in a radial manner.
In conclusion, the kind of drainage pattern that would develop on the slopes of Mount Rainier, an isolated volcano in Washington State, is a radial drainage pattern.
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