The pelagic zone is best defined by "all the open water of the ocean." Therefore the correct option is option A.
The pelagic zone is the area in the ocean that is not connected to the seafloor, and is thus sometimes referred to as the "open ocean." The pelagic zone is defined by all the open water of the ocean, which is often separated into vertical zones by depth, depending on light levels, temperature, and other physical variables.
The epipelagic zone, the mesopelagic zone, the bathypelagic zone, and the abyssopelagic zone are the four layers of the pelagic zone that exist. There is less life in the open pelagic zone than in shallower waters, and it is difficult for marine animals to survive there because they have to fight the constant movement of the ocean.
Despite the harshness of the open ocean, a diverse array of sea creatures exist there, ranging from small planktonic organisms to large marine mammals. Therefore the correct option is option A.
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The pelagic zone is best defined by which option? responses
all the open water of the ocean the benthic zone only the deep ocean the intertidal zone onlywhich tectonic plates are responsible for the majority of seismic activity in the alpine-himalayan belt?
The Indo-Australian and Eurasian plates are responsible for the majority of seismic activity in the Alpine-Himalayan belt.
What is the Alpine-Himalayan Belt?
The Alpine-Himalayan Belt is a zone of convergence formed as a result of the collision of the Indian Plate with the Eurasian Plate. It stretches from the Mediterranean Sea through the Alps, Caucasus Mountains, and into Central Asia and the Himalayas.
The zone is referred to as a "collisional" or "convergent" boundary, where two plates move toward one another. These two plates are the Indian Plate and the Eurasian Plate.
As a result of the collision, the northern portion of the Indian Plate has been pushed upwards, resulting in the formation of the Himalayan mountain range.
The Himalayas are one of the most seismically active regions globally. The main tectonic activity in the region is due to the collision of the Indo-Australian Plate and the Eurasian Plate.
The two tectonic plates are pushing against one another, causing the land to uplift, leading to the formation of the Himalayas. This collision of two plates causes seismic activity, which is responsible for the majority of seismic activity in the Alpine-Himalayan belt.
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The ________ of the land greatly affects the runoff.
The slope of the land greatly affects the runoff.
What is runoff?Runoff is the movement of water from land to water bodies, including streams, lakes, and oceans, following a precipitation event. Runoff happens when the soil is saturated with water and can't absorb it anymore, causing the excess water to flow over the surface of the land to lower elevations. Runoff is a significant part of the hydrologic cycle, which includes evapotranspiration, precipitation, and infiltration. Slope affects runoff by influencing the amount of runoff, the speed of runoff, and the direction of runoff. When water falls onto a surface, it can either be absorbed, infiltrated into the soil, or run off the surface if the surface is steep enough. If the slope is steep, water runs down the surface rapidly, and there is less time for the water to infiltrate into the soil.
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further west from this deep u.s. trough, eastern alaska, as well as yukon and british columbia, canada, were being impacted by a . a. ridge b. trough g
Further west from the deep U.S. trough, Eastern Alaska, as well as Yukon and British Columbia, Canada, were being impacted by a ridge.
A ridge of high pressure is impacting Eastern Alaska, Yukon and British Columbia in Canada, further west from the deep U.S. trough. A ridge of high pressure is an area of high atmospheric pressure, which is associated with fair weather, light winds and generally pleasant conditions. This ridge is formed when two air masses move away from each other, causing the air pressure in the area to increase. A ridge is typically indicated on a weather map by a line of red L's. The L's are placed on the map in the direction of the wind flow around the ridge, with the point of the L representing the area of highest atmospheric pressure.
The increased atmospheric pressure caused by the ridge produces lighter winds and warmer temperatures. The warmer temperatures and decreased wind speeds generally lead to more stable weather conditions and less precipitation. The ridge can also bring dry and sunny conditions, as well as a decrease in storm activity. These effects can be felt further downwind of the ridge, making it a welcomed feature in many areas.
In contrast, a trough is typically associated with low-pressure areas that produce wet, stormy weather conditions, as well as cool temperatures. This is because the low-pressure system promotes the formation of clouds and precipitation, which can reduce the amount of solar radiation that reaches the Earth's surface.
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identify the false statement. the rock cycle indicates that: group of answer choices sedimentary rock cannot form from other sedimentary rocks because the pathway is always from one rock type to a different rock type. in order to make a metamorphic rock, burial and/or heating are needed. a granite that was eroded, transported, and then deposited would eventually become a sedimentary rock. input of new melt from the crust enters the rock cycle as an igneous rock.
The false statement is that in order to make a metamorphic rock, burial and/or heating are needed. This is false because metamorphic rock can also form from other metamorphic rocks, and does not necessarily require burial and/or heating.
Metamorphic rocks are formed when existing rocks are exposed to extreme temperature and pressure, which can occur either deep within the earth or near the surface. When existing metamorphic rocks experience these extreme conditions, they can change into different metamorphic rocks, without requiring burial or heating.
This shows that the pathway of the rock cycle is not always from one rock type to another, but can also be from one rock type to the same rock type. For example, a granite that was eroded, transported, and then deposited would eventually become a sedimentary rock.
This sedimentary rock could then undergo metamorphism and be changed into a metamorphic rock, without requiring burial and/or heating. This is an example of how the rock cycle indicates that sedimentary rocks can form from other sedimentary rocks.
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Deserts are formed by a __________ process as large variations in temperature between day and night put strains on the rocks causing them to break into pieces.
Deserts are formed by a physical weathering process as large variations in temperature between day and night put strains on the rocks causing them to break into pieces.
The physical weathering of rocks is caused by temperature fluctuations in the desert. The rocks heat up during the day and cool down at night, causing them to expand and contract. As a result, the rocks can eventually break apart into small pieces over time. In a desert, there is little vegetation, and the wind can carry the pieces of rock, causing the land to erode and form sand dunes. In areas where there is little rain, the landscape can become arid, which contributes to the formation of a desert. Over time, the desert climate develops, with its distinctive patterns of temperature variation, limited precipitation, and lack of vegetation. Many deserts are found in areas around 30 degrees north or south of the equator, such as the Sahara in Africa and the Mojave in the United States.
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q1: for approximately how many thousands of years has the earth been in the peak of an interglacial period within the present ice age?
The current interglacial period, which began around 11,700 years ago, is part of the Quaternary Ice Age that has been occurring for the past 2.6 million years.
During this period, the Earth has experienced multiple ice ages with cooler and warmer periods known as glacial and interglacial phases. The present interglacial period, known as the Holocene, has been in the peak of its cycle for about 11,000 years.
During this time, global temperatures have been relatively stable, with sea levels rising and falling as the glaciers advance and retreat. This has enabled human civilizations to flourish and expand.
Despite this, the Earth is still in the Ice Age and the current interglacial period could end at any time, leading to a new glacial phase. The duration of this interglacial period is unknown, but it is likely to last several thousand years more before the next glacial period begins.
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can you identify the minerals that comprise igneous rocks? drag the appropriate labels to their respective targets. the specific colors of the referenced mineral crystals within the rocks have been supplied to assist you. labels will only be used once, and not all labels will be used.\
Igneous rocks are made up of different minerals depending on the type of rock. The most common minerals found in igneous rocks are quartz, feldspar, mica, hornblende, and pyroxene. Quartz is usually colorless or white, feldspar can be white, pink, or gray, mica can range from green to brown to black, hornblende is usually black or green, and pyroxene is usually black.
Granite is an example of an igneous rock that contains quartz, feldspar, mica, and hornblende. Basalt is an example of an igneous rock that contains feldspar, pyroxene, and sometimes olivine. Peridotite is an example of an igneous rock that contains olivine, pyroxene, and sometimes hornblende.
The minerals in igneous rocks can be identified using a variety of methods including color, hardness, streak, luster, and cleavage. Color can be used to distinguish between different minerals; quartz is usually colorless or white, feldspar is usually pink, gray, or white, mica is usually green, brown, or black, hornblende is usually black or green, and pyroxene is usually black.
Hardness is another way to distinguish between different minerals. Quartz is the hardest mineral and has a hardness of 7 on the Mohs scale. Feldspar is slightly softer with a hardness of 6, mica has a hardness of 2-3, hornblende has a hardness of 5-6, and pyroxene has a hardness of 5-6.
The streak of a mineral is the color it leaves when scratched on a streak plate. The streak of quartz is white, the streak of feldspar is white or gray, the streak of mica is white, the streak of hornblende is black, and the streak of pyroxene is black.
Luster is another way to identify different minerals. Quartz has a vitreous luster, feldspar has a pearly or dull luster, mica has a pearly or silky luster, hornblende has a vitreous or pearly luster, and pyroxene has a vitreous or dull luster.
The cleavage of a mineral is how it breaks when it is struck or compressed. Quartz has no cleavage, feldspar has two directions of cleavage, mica has one direction of cleavage, hornblende has two directions of cleavage, and pyroxene has two directions of cleavage.
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intermediate and felsic magmas usually form: group of answer choices at oceanic spreading centers at subduction zones. where plates diverge where volcanoes lie above transform faults.
Intermediate and felsic magmas usually form at subduction zones. The magma that forms at subduction zones is intermediate in composition.
The intermediate magma has properties that lie between the mafic magma and the felsic magma. As a result, the intermediate magma contains intermediate amounts of light and dark silicate minerals. Basalt and gabbro are the most common examples of mafic magma, while granite and rhyolite are the most common examples of felsic magma.
Subduction zones, on the other hand, are where one tectonic plate is pushed beneath another. This is known as the process of subduction. Subduction zones are also where the vast majority of volcanoes are located. When a tectonic plate is pushed under another, it melts and the resulting magma is less dense than the surrounding rocks.
This magma then rises to the surface and forms a volcano. This is the most typical location where intermediate magmas are formed. Intermediate and felsic magmas usually form at subduction zones.
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in what geologic setting are violent volcanic eruptions most likely to occur? transform fault volcanic arcs hot spot beneath oceanic lithosphere mid-ocean ridge
In the geologic setting, violent volcanic eruptions are most likely to occur in the volcanic arcs and hot spots beneath the oceanic lithosphere.
A volcanic arc is a curved chain of volcanic islands or mountain ranges created by tectonic movements along convergent plate boundaries. These chains of volcanoes are usually found along the edges of continents or beneath the oceans, indicating that these areas are geologically active.
Violent volcanic eruptions: These are explosive types of volcanic eruptions. It releases large volumes of pyroclastic material, ash, and gas into the atmosphere. These eruptions are so violent that they can change the global climate for several years.
The most well-known type of violent volcanic eruption is a Plinian eruption, named after Pliny the Younger, who observed the 79 AD eruption of Mount Vesuvius in Italy. This type of eruption produces a massive, towering column of gas, ash, and rock that can travel more than 30 km (20 mi) into the sky.
Examples of volcanic arcs:
Japan's islands are a good example of volcanic arcs. It is created by the collision between the Pacific Plate and the Philippine Sea Plate. The Aleutian Islands, which stretch from Alaska to Russia, are also a volcanic arc formed by the collision of the Pacific Plate and the North American Plate. The Andes are another example of a volcanic arc, formed by the collision of the South American Plate with the Nazca Plate.Hotspots under the oceanic lithosphere happen when magma comes up from deep inside the Earth and forms a hot column of material that melts through the oceanic plate above it. This results in a series of volcanic islands, like the Hawaiian Islands. These volcanoes can erupt explosively, but they can also have gentler eruptions with lava flows.
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the crust in the basin and range province of nevada, utah, and arizona is stretching; therefore, fault movement in this region must be group of answer choices reverse. normal. shear. thrust.
Fault movement in the Basin and Range Province of Nevada, Utah, and Arizona is mainly reverse (or compressional) due to the crust stretching.
Reverse faults occur when the blocks of Earth’s crust move away from each other, resulting in uplift and folding of rocks. This type of faulting is also referred to as compression, contraction, or shortening. As the crust stretches, reverse faults allow the Earth's surface to adjust by moving blocks of rock towards each other in opposite directions.
This type of faulting is distinguished from normal faults, which involve the blocks of Earth’s crust sliding away from each other, resulting in a drop in elevation. Shear faults involve two blocks of Earth’s crust sliding past one another, causing a step in the Earth’s surface. Thrust faults are similar to reverse faults but involve movement of the Earth’s surface in a curved manner, forming an “S” shape.
In the Basin and Range Province of Nevada, Utah, and Arizona, the fault movement is mainly reverse. This type of faulting occurs as the Earth's crust stretches, allowing the blocks of Earth’s crust to move towards each other in opposite directions. This type of faulting can result in uplift and folding of rocks, creating a mountainous terrain.
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mapping does not: group of answer choices provide a baseline against which to measure the impact of improvement efforts. define the boundaries of a process. provide a detailed view of all elements external to the process. create a common understanding of the content of a process.
Mapping does not provide a detailed view of all elements external to the process. Therefore the correct option is option C.
Mapping is a representation of something on paper that is simplified or reduced to its essential characteristics. Mapping is the process of graphically portraying the entire business process to give a visual perspective of how it functions in practice.
The advantages of Mapping are as follows: Maps can be used to simplify complicated concepts or interactions. Maps can assist in the detection of mistakes or improvement areas. Maps provide a clear picture of who is involved, what they do, and how their work connects to the rest of the organization.
Maps help to create a shared understanding and language. A baseline is a reference point or a standard against which something can be assessed or measured. Mapping does not provide a detailed view of all elements external to the process. Therefore the correct option is option C.
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mapping does not: group of answer choices
provide a baseline against which to measure the impact of improvement efforts. define the boundaries of a process. provide a detailed view of all elements external to the process. create a common understanding of the content of a process.which low-grade metamorphic rock, composed of extremely fine-sized mica and other mineral grains, typically exhibits well-developed rock cleavage? group of answer choices hornfels quartzite schist slate
The low-grade metamorphic rock that is composed of extremely fine-sized mica and other mineral grains, and typically exhibits well-developed rock cleavage, is slate.
Slate is composed of a number of minerals including mica, quartz, and clay minerals, and has a foliated structure. This foliated structure allows it to split along well-developed planes of cleavage which are parallel to the foliation. Slate is composed mainly of very fine-sized mica minerals and other mineral grains, such as quartz, feldspar, and chlorite. The mica minerals in slate are typically muscovite and biotite, which have a platy or flaky structure that allows them to align themselves in a parallel orientation, giving the rock its distinctive cleavage
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you are in michigan. news reports on climate change focus on sea level rise on the coasts and flooding in california. how would this influence your perception of the risk from climate change?
News reports on climate change focusing on sea level rise on the coasts and flooding in Michigan would not directly influence.The perception of the risk from climate change in Michigan.
However, it is important to note that Michigan is not immune to the effects of climate change. It is experiencing its own set of climate-related challenges, such as increased frequency and severity of extreme weather events. It is crucial to recognize that climate change poses unique risks and vulnerabilities to each region and take action to mitigate and adapt to these impacts in Michigan.
Michigan may be more susceptible to extreme weather events like floods, heat waves, or droughts.It is crucial to assess the local impacts of climate change in Michigan and take necessary steps to mitigate and adapt to them.
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which of the following describe the san andreas fault? multiple select question. a. it is located along the boundary between the north american plate and the pacific plate. b. it is made of different segments that have different tectonic behaviors.
c. it is located along a subduction zone. d. it is located in california. the 1906 san francisco earthquake is the most recent to occur along the fault.
The San Andreas Fault can be described by the following options: a. it is located along the boundary between the North American Plate and the Pacific Plate, b. it is made of different segments and d. it is located in California..
San Andreas Fault:The San Andreas Fault is located along the boundary between the North American Plate and the Pacific Plate, and it is made up of different segments that have different tectonic behaviors. This is the description that describes the San Andreas Fault.
Therefore, the correct options are: It is located along the boundary between the North American Plate and the Pacific Plate. It is made of different segments that have different tectonic behaviors. It is located in California. The 1906 San Francisco earthquake is the most recent to occur along the fault.
The San Andreas Fault is one of the most prominent geological features of California. It runs along the western coast of the United States, running through California's most populous cities, and it is responsible for producing many earthquakes over the years.
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pls do this asap as soon as possible
Based on the current growth rate, you can predict that the population of Rio de Janeiro in 2040 should be between 21 million and 22 million.
How to calculate the growth rate of Rio de Janeiro in 2040?We start by finding the current growth rate by looking at the population of 2010 and 2015.
Population in 2010 = 11.5 million
Population in 2015 = 11.9 million
Difference is 0.4 million
Using the difference of 0.4, the population growth rate will be calculated as;
11.9 + (2040 - 2015)(0.4)
= 11.9 + (25 x 0.4)
= 11.9 + 10
= 21.9
Considering that the population growth throughout the years does not have a uniform interval, you can only predict that the population of Rio de Janeiro should be between 21 and 22 million.
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which of the following is true of highland climates? group of answer choices they occupy the largest land area of any climate. they have a small seasonal temperature range all of the subtypes of this climate have a uniform annual precipitation regime they are only in highland regions
From the given options, Highland climates occupy the largest land area of any climate and are found in highland regions. Also, they have a seasonal temperature range, and have an uniform annual precipitation regime.
Highland climates are characterized by a small seasonal temperature range and a uniform annual precipitation regime. They are found at higher elevations and are typified by cooler temperatures and more precipitation than climates located at lower elevations. These climates typically experience four distinct seasons with colder winters and milder summers than the climates located at lower elevations.
Highland climates have a greater diversity of microclimates, depending on the local terrain and elevation. For example, the highland climate of the Appalachian Mountains experiences colder temperatures and greater precipitation than the highland climate of the Rocky Mountains. Additionally, highland climates experience higher levels of cloud cover and more frequent fog, leading to less direct sunlight. This results in decreased levels of evapotranspiration and a greater retention of moisture.
Overall, highland climates occupy the largest land area of any climate, are found in highland regions, have a small seasonal temperature range, and have a uniform annual precipitation regime. These climates experience four distinct seasons with colder winters and milder summers and higher levels of cloud cover and more frequent fog than lower elevation climates.
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the oceania/pacific region is comprised of thousands of islands. these islands are classified as high and low islands based on their latitude. high islands are near the poles and low islands are near the equator. true false
False. The classification of high and low islands is based on their geological formation, not their latitude. High islands are typically volcanic and have rugged terrain with high elevations, while low islands are coral atolls and have relatively flat terrain with low elevations. The Oceania/Pacific region is indeed comprised of thousands of islands, but their classification as high or low is not determined by their latitude.
The Oceania/Pacific region is home to thousands of islands that are geologically diverse. One way that these islands are classified is by their geological formation into high and low islands. High islands are typically formed from volcanic activity and have rugged terrain with high elevations. They are often found near tectonic plate boundaries and near the poles. In contrast, low islands are coral atolls that have formed over millions of years as coral reefs grow on top of submerged volcanoes. These islands have relatively flat terrain with low elevations and are typically found near the equator.
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What is Fiji known for? a. grassland and hurricanes b. landfills c. tropical islands
drought can be caused by all the following except question 5 options: change in the direction of an ocean current persistent offshore breeze persistent low pressure persistent high pressure
Answer: drought is likely caused by persistent HIGH pressure, persistent offshore breeze, and changes in the direction of an ocean current.
Explanation:
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12. Scientists have discovered a correlation between rising global temperatures and extreme weather events, such as large amounts of rainfall and runoff. What factor would support an argument that global warming causes more extreme weather events?
A. Warmer air holds more moisture
B. Warmer air holds less moisture
C. Warmer air always moves in a circular pattern
D. Warmer air reflects more of the sun's ultraviolet rays
FactorA: Warmer air holds more moisture, would support an argument that global warming causes more extreme weather events.
Climate changes brought on by global warming are resulting in increasingly frequent and severe extreme weather events.The amount of water vapour in the atmosphere rises along with the Earth's temperature, which can result in more frequent and intense rainfall and floodingIn addition, warmer air can lead to more frequent and severe heat waves, wildfires, and droughts, which can have catastrophic effects on ecosystems and human settlements.Sea levels are rising as a result of melting glaciers and ice sheets, which causes storm surges and coastal floods to occur more frequently and more severely.Warmer ocean temperatures can also result in more frequent and powerful tropical storms and hurricanes, which can inflict extensive damage and fatalities.
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compared to the north sea and atlantic ocean, with what problem must the mediterranean, baltic, and black seas contend?
The Mediterranean, Baltic, and Black seas all have different levels of salinity compared to the North Sea and Atlantic Ocean. The Mediterranean is the most saline of the three seas, having the highest percentage of dissolved salts per liter of water. The Baltic Sea is the least saline of the three, having the lowest percentage of dissolved salts per liter of water.
The Black Sea is intermediate in terms of salinity, having a lower percentage of dissolved salts per liter of water than the Mediterranean Sea but higher than the Baltic Sea.
The differences in salinity between the seas create a variety of challenges for marine life and the local environment. For example, the low salinity of the Baltic Sea means that many species of fish can't survive there due to osmotic shock. The higher salinity of the Mediterranean Sea means that the majority of marine life in the region is adapted to live in a saline environment. This can also make it difficult for species that are not adapted to saline environments to colonize the region.
The difference in salinity between the seas can also cause problems for the local environment. For example, the high salinity of the Mediterranean Sea can lead to increased evaporation, resulting in a higher rate of water loss from the sea. This can be detrimental for the local environment, as a decreased volume of water can lead to a decrease in biodiversity and a higher risk of coastal flooding.
Overall, the Mediterranean, Baltic, and Black seas have different levels of salinity compared to the North Sea and Atlantic Ocean, which can create a variety of challenges for marine life and the local environment.
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what does arcgis pro do if you put several data sets with different coordinate systems in the same map?
ArcGIS Pro is an advanced GIS software that allows you to analyze and visualize data in 2D and 3D. It has a range of geoprocessing tools and an extensive range of map data that can be used for visualization and data analysis.
ArcGIS Pro will automatically perform coordinate system transformations on the fly when data sets with different coordinate systems are added to the same map.
The maps and data frames are matched to the first layer added with a specific coordinate system, and transformations are applied as required to display the data in the desired projection. In ArcGIS Pro, this is referred to as projection on the fly, and it is enabled by default.
When multiple layers are added to a map that has different coordinate systems, the map's coordinate system is established by the first layer added. ArcGIS Pro then matches the data frames and maps to the established coordinate system for the display. If a layer has a different coordinate system than the map, ArcGIS Pro automatically reprojects the layer's features on the fly to match the map's coordinate system, ensuring that all layers display properly.
ArcGIS Pro also enables the conversion of data in different coordinate systems into a common projection. This is accomplished by using the project tool, which is available in ArcGIS Pro's toolbox. This tool can be used to transform data from one coordinate system to another, and the new data can then be added to the map as a new layer.
In ArcGIS Pro, it's possible to save these newly projected data layers in the desired projection. The ArcGIS Pro software has numerous functionalities that can be used to work with data sets with different coordinate systems.
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magma extruded at high temperatures tends to be: group of answer choices non viscous very viscous very explosive unwelcome at a party
The answer to the question "Magma extruded at high temperatures tends to be" is "very viscous".
Magma extruded at high temperatures tends to be very viscous.
Magma is a molten material beneath the earth's surface that can either cool and solidify, crystallize, or erupt from a volcano as lava. Magma, which is made up of a liquid portion known as a melt and a solid portion known as crystals, is less dense than solid rock and hence rises.
It's a combination of various materials including liquid rock, dissolved gases, and crystals. Magma extruded at high temperatures tends to be very viscous, which means that it's thick and sticky, making it difficult to flow. The viscosity of magma is influenced by its composition and temperature.
The more silicate in the magma, the higher the viscosity. As a result, andesitic and rhyolitic magmas have high viscosity, whereas basaltic magmas have low viscosity, making them very fluid. The degree of gas content in the magma also affects the viscosity of the magma.
Magma that is very viscous will contain a higher amount of silicate. It will be thick and sticky, making it hard to flow. As a result, magma with a high viscosity tends to be explosive when it reaches the surface.
The magma may become trapped, resulting in increased pressure and explosive eruptions that may include lava, ash, and pyroclastic material.
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Which of the following types of farming is not historically prevalent in the United States of America?
Dairy farming
None of the other answers
Grain farming
Livestock ranching
Mixed-crop farming
Answer:
Dairy farming
Explanation:
the answer is dairy farming
what side of the himalayan mountains gets all the rain and why
The southern side of the Himalayan mountains, also known as the windward side, receives most of the rain.
Why it is?
This is because of the orographic effect, which is the process by which moist air is forced to rise up and over a mountain range.
As the moist air rises, it cools and condenses, leading to the formation of clouds and precipitation. On the southern side of the Himalayas, moist air from the Indian Ocean is forced to rise up and over the mountains, resulting in heavy rainfall in regions like Nepal, Bhutan, and northeastern India.
In contrast, the northern side of the Himalayas, which includes regions like Tibet and western China, receives little precipitation due to the dry air that descends on the leeward side of the mountains.
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new seafloor rock is continually being formed at mid-ocean ridges and old seafloor rock is continually removed at ocean trenches.if the rock on the continents is continually formed but now removed, how does the age of the oldest rocks on the continents compare with the age of the oldest rocks on the seafloor?
This is because the continents contain rocks that are billions of years old, while the oldest rocks are only about 200 million years old due to the constant process of seafloor spreading and subduction.
The age of the oldest rocks on the continents provides important insights into the geological history of the Earth. These rocks are typically found in the stable interiors of continents, where they have been preserved over billions of years.In contrast, the seafloor is a relatively young feature of the Earth's surface. New seafloor rock is continually being formed at mid-ocean ridges, where magma rises to the surface and solidifies, creating new oceanic crust.As the seafloor moves away from the mid-ocean ridges, it cools and becomes denser, eventually sinking back into the Earth's mantle at ocean trenches. This process of seafloor spreading and subduction means that the oldest seafloor rocks are only about 200 million years old.In comparison, the oldest rocks on the continents are typically several billion years old.
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what seemingly unconnected event in the 1950's helped to provide even more evidence of plate tectontics?
In the 1950s, the discovery of magnetic stripes on the ocean floor provided even more evidence of plate tectonics.
When new volcanic material is formed and cooled, the direction of the Earth's magnetic field at that time is preserved in the rocks. Therefore, the stripes were discovered to be parallel to the mid-Atlantic Ridge, which is a long mountain range that runs down the middle of the Atlantic Ocean.
This indicated that the ocean floor was spreading apart at this location, with new material being added on either side. This discovery, combined with other evidence such as the pattern of earthquakes and the distribution of rock types, supported the theory of plate tectonics. Therefore, the seemingly unconnected event in the 1950s that helped to provide even more evidence of plate tectonics was the discovery of magnetic stripes on the ocean floor.
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besides mount st. helens, what other volcanoes in the cascades have erupted at least six times in the past 4,000 years?
Mount St. Helens is one of several volcanoes in the Cascades Range that has had multiple eruptions in the past 4,000 years.
The Cascade Range of volcanoes is well-known for its volcanic activity. There are numerous volcanoes in the Cascade Range that have erupted at least six times in the last 4,000 years. Some of these volcanoes include Mount Shasta, Mount Baker, Mount Hood, and Mount Rainier.
Mount Hood: Mount Hood, situated in the Cascades, is a dormant volcano that has erupted several times in the past, with the last one occurring in 1865. The Mount Hood Volcano is known for its periodic eruption, with a recurrence rate of 150-200 years.
Mount Rainier: Mount Rainier is an active volcano located in the Cascades, and it is the highest mountain in Washington State. Mount Rainier has erupted numerous times in the past, and it is still classified as an active volcano today.
Mount Shasta: Mount Shasta, located in California's Cascades, is one of the most active volcanoes in the Cascade Range. Mount Shasta has erupted at least seven times in the last 4,000 years, with its last eruption occurring around 200 years ago.
Mount Baker: Mount Baker is another active volcano in the Cascades, situated in Washington State. Mount Baker has erupted nine times in the last 4,000 years, with its most recent eruption occurring in 1843. There are many other examples of volcanoes in the Cascades that have erupted at least six times in the last 4,000 years.
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The characteristics of __________ deserts include high temperatures in summer; greater evaporation than precipitation; considerable variation in the occurrence of precipitation, its intensity and distribution; and low humidity.
"The characteristics of hot deserts include high temperatures in summer; greater evaporation than precipitation; considerable variation in the occurrence of precipitation, its intensity and distribution; and low humidity."
Hot deserts are characterized by extreme temperatures in summer, with daytime temperatures often reaching above 40°C. The combination of high temperatures and low humidity can make these environments challenging for human habitation. These arid regions typically receive very little rainfall, and what precipitation does occur is often sporadic and highly variable in intensity and distribution.
As a result, evaporation rates are typically much higher than precipitation rates, leading to a scarcity of water and limited vegetation. Despite these challenges, hot deserts are home to a variety of unique plant and animal species that have adapted to survive in these harsh conditions.
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the largest portion of fresh water today is located in question 43 options: clouds. ice caps and glaciers. groundwater resources. the major rivers and lakes of the world.
The largest portion of fresh water today is located in ice caps and glaciers.
Freshwater is critical to life and human development, and is a finite resource on our planet. Ice caps and glaciers are the largest portion of freshwater on the planet today, accounting for roughly 68.7% of the planet's freshwater resources.
In a nutshell, ice caps and glaciers are the largest freshwater resources on the planet, accounting for about 68.7 percent of the planet's freshwater resources. Freshwater is crucial to life and human progress, and it is a finite resource on our planet. Therefore, it is important to protect and conserve freshwater resources.
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