Earthquakes at Mount St. Helens prior to the major eruption in 1980 were caused by magma rising in the volcano.
Magma is molten rock that originates deep within the Earth's crust and is pushed upward by the Earth's tectonic forces. This movement can cause earthquakes, as the magma moves through cracks and faults in the Earth's crust.
The other multiple choice answers are incorrect, as they would not have caused the earthquakes that were felt prior to the eruption.
Landslides, or mass movements of rock and soil, and steam explosions, or the rapid release of steam and volcanic gases, typically occur during an eruption. Therefore, these are unlikely to have caused the earthquakes prior to the eruption.
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Which of the layers in the atmosphere do temperatures vary the most?
Answer:
The Troposphere
Explanation:
It has most of our weather like rain, snow, and clouds. On this part of the atmosphere, the temp gets cold as the amount of space above the earth increases.
in an area of known past glaciation, and knowing what we have studied so far, hummocky topography most often results from
In an area of known past glaciation, hummocky topography most often results from debris deposited by melting glaciers.
Hummocky topography is a surface feature created when a glacier melts and recedes, leaving behind a series of small hills and valleys. This topography is formed when the glacier pushes rocks, soil, and other debris forward as it moves, creating a bumpy surface. As the glacier melts, the debris is left behind and forms these hummocks and mounds. In areas of known past glaciation, hummocky topography is one of the most common features that remain.
A hummock is a small hillock, knoll, or mound. A hummocky topography is one that contains such little hills and mounds. This condition usually results from ice movements and melting, as it can cause landmasses to rise, shift and reshape. Similarly, the hummocky topography that arises from glacial debris results from the material, including boulders, rocks, gravel, and sand, that was deposited by melting glaciers.
The debris is sorted based on its size, with larger rocks at the top and finer debris at the bottom. The hummocks are formed by the melting of the smaller debris, while the larger rocks are left behind as hillocks. These features are common in regions that were once under glaciers, as the melting and erosion of the ice left behind these deposits.
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new york is underlain by metamorphic rock. the photo below shows an outcrop of rock in central park that contains many thin sheets. is this rock foliated or nonfoliated?
The rock outcrop in Central Park appears to be foliated. This is because it contains many thin, parallel sheets of rock, which is an indication of foliation.
Foliation occurs when a rock has been subjected to intense pressure and heat over a long period of time, which causes the minerals within the rock to form into thin layers. This type of foliation is known as schistosity and is a common feature of metamorphic rocks.
The foliation of the rock outcrop in Central Park suggests that it has been subjected to the kind of intense pressure and heat that is necessary to form schistose-type foliation, which is consistent with the fact that it is part of the metamorphic rock that underlies New York.
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|Test, pls help!|
6. When a warm front from a large body of water moves quickly into a land area of cold air, we can expect ___ to occur where the two air masses meet.
A. Fog
B. Low Humidity
C. Precipitation
D. A gentle sea breeze
Answer: C) precipitation
which of the following does not exert a major infuence on low -latitude climates? trade winds ictz thermal low pressure system subtropical high pressure cells westerlies
Answer: The correct option is WESTERLIES.
With the exception of Hawaii, the map shows the pattern of production for coffee beans by country.
Which of the following best describes the pattern of coffee bean production at the global scale?
answer choices
O a core and periphery
O a hierarchical diffusion
O within tropical latitudes
O inside arid climate regions
O in more developed countries
Answer:
Within tropical latitudes
Explanation:
I got the answer from quizlet
which of the following are foliated intermediate- or high-grade metamorphic rocks that would form in the setting in part 1? choose one or more: a. phyllite b. schist c. marble d. slate e. gneiss f. hornfels
In the environment, foliated intermediate- to high-grade metamorphic rocks called gneiss would form.
Which of the above is a foliated rock of high or intermediate metamorphic grade?Slate, phyllite, schist, & gneiss are the several types or foliated metamorphic rocks, ordered by of the grade or severity of metamorphic rocks and the type of foliation.
Metamorphic rocks of intermediate grade also contain garnet and mica. At 800 degrees Celsius, high grade metamorphic stones develop in regions that are so hot they virtually melt. Sillimanite, a mineral that is commonly found inside the rock gneiss, is one that develops in this extreme heat.
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match each rock with the environment in which it most likely formed. acoal bmarine shale cred beds dmarine sandstone
The environment in which each rock most likely formed is as follows:
Coal: Swamps and marshes
Marine Shale: Ocean floor
Crude Beds: Shallow seas and river deltas
Marine Sandstone: Shallow seas and beaches
Coal is usually found in swamps and marshes, which are environments where dead plant matter can accumulate without decomposing. Marine shale is found on the ocean floor, where fine-grained sediment has been compacted over time.
Crude beds are typically found in shallow seas and river deltas, where sand and mud have accumulated. Marine sandstone is frequently found in shallow seas and beaches, where sand grains are compacted over time. Environment is defined as the surroundings or conditions in which a person, animal, or plant survives or operates.
The environment can refer to both natural and human-made surroundings. The Earth's environment is composed of a wide range of natural and human-made features, which include the atmosphere, oceans, land, and ecosystems.
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during the planet formation process, runaway growth of planetesimals is enabled by group of answer choices
During the planet formation process, the runaway growth of planetesimals is enabled by the gravity of the large planetesimals. The statement is very true.
The term planet formation is referred to the processes that resulted in the formation of planets. Planets are born from the same stuff as stars. The vast clouds of gas and dust in space are known as nebulae. The sun, planets, and all other stars in the universe began as a nebula.
The planet formation process begins with the development of planetesimals. Planetesimals are small, irregularly shaped bodies made up of rock and metal that orbit the sun. These planetesimals collided and adhered to one another, forming bigger bodies. These bigger bodies were then attracted to one another by gravity, eventually resulting in the formation of planets.
The larger planetesimals' gravity can attract and merge smaller ones, producing even larger planetesimals. When some planetesimals reach around the size of the Moon or Mars, their gravity becomes strong enough to pull in gas from the surrounding nebula, causing the planetesimal to develop into a planet.
It was said that during the planet formation process, the runaway growth of planetesimals is enabled by the gravity of the large planetesimals.
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describe the impacts that large continental ice sheets can have on climate. are they stabilizers or destabilizers?
The Antarctic Ice Sheet is losing mass at an accelerating rate, and playing a more important role in terms of global sea-level rise. The Amundsen Sea sector of West Antarctica has most likely been destabilized. Although previous numerical modeling studies examined the short-term future evolution of this region, here we take the next step and simulate the long-term evolution of the whole West Antarctic Ice Sheet. Results show that if the Amundsen Sea sector is destabilized, then the entire marine ice sheet will discharge into the ocean, causing a global sea-level rise of about 3 m. We thus might be witnessing the beginning of a period of self-sustained ice discharge from West Antarctica that requires long-term global adaptation of coastal protection.
what is left after the collision between a ridge and a trench, like what happened to the farallon plate?
When a ridge collides with a trench, it is pushed under the continent because it is denser than the continent. This method of plate motion is called subduction.
The ridge is subducted and melts at high temperatures to produce magma. The magma slowly rises through the mantle to the surface and solidifies, forming new land above the continent.
Volcanoes and volcanic islands are examples of this. The Andes Mountains are one example of this phenomenon, as the Nazca Plate collides with the South American Plate at the Peru-Chile Trench and is pushed underneath the continent.
There is a continuous upward rise of magma that produces volcanoes and volcanic islands in the Andes Mountains, the Aleutian Islands, the Caribbean Islands, and other locations.
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the runup of a tsunami is affected by group of answer choices shape of the seafloor immediately offshore. topography of the beach. patterns of vegetation. all the above.
The correct answer is "all the above". The runup of a tsunami is affected by the shape of the seafloor immediately offshore, the topography of the beach, and the patterns of vegetation.
For more information, the runup of a tsunami is affected by the shape of the seafloor, because the wave will become higher or lower depending on the shape of the seafloor. The topography of the beach also affects the runup of a tsunami, because certain beach shapes can cause the wave to grow higher. The patterns of vegetation also affect the runup of a tsunami, because the vegetation can slow down the wave or cause it to break.
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the flow that is more dilute, less-dense, and fast moving and has more steam and less pyroclastic material is called a pyroclastic
Pyroclastic flow is a highly hazardous volcanic phenomenon that refers to the super-hot, fast-moving, and highly energetic mixture of ash, gases, and rocks that flow down the slopes of volcanoes.
What is a pyroclastic flow?
A pyroclastic flow is a highly destructive volcanic process characterized by a fast-moving and highly dense current of rock debris, ash, and hot gases that flow down the slopes of an erupting volcano, generally following the path of least resistance.
The rock debris is typically made up of lava, tephra, and rock fragments, which are ground to fine particles by the volcanic activity. Pyroclastic flows may also contain gas bubbles, which make them highly explosive, and can reach temperatures of over 1,000 degrees Celsius.
In addition, they can also travel up to speeds of over 700 kilometers per hour and can spread for hundreds of kilometers from the volcano. The flow that is more dilute, less dense, and fast-moving and has more steam and less pyroclastic material is called a pyroclastic surge.
Pyroclastic surges are usually less destructive than pyroclastic flows, but they can still be hazardous to nearby populations.
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detrital sedimentary rocks are classified (named) based on the . group of answer choices grain sizes of the detrital particles mineral composition degree of compaction and lithification colors of the cementing minerals
Detrital sedimentary rocks are classified (named) based on the grain sizes of the detrital particles. Therefore, the correct option is option 1.
Sedimentary rocks are formed as a result of sedimentary processes such as weathering, erosion, and transportation of minerals and rock debris. Sedimentary rocks are created by the settling of minerals and rock debris that were carried away by wind, water, and ice.
Sedimentary rocks that are formed from fragments of rock or minerals that have been weathered and transported are referred to as detrital or clastic sedimentary rocks. They're made up of fragments of minerals or rock that were carried away by a natural process and accumulated in a sedimentary basin.
The grain size of the particles in the sedimentary rock determines its name. A sedimentary rock is referred to as breccia when its particles are larger than 2mm, as sandstone when its particles are between 1/16 and 2mm, as siltstone when its particles are between 1/256 and 1/16mm, and as shale when its particles are smaller than 1/256mm.
Hence, the detrital sedimentary rocks are named according to their grain size, with names like sandstone, siltstone, and shale. Hence, the first option is the first option.
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Rice is the staple food for over half the people in the world. What is meant by this statement?
A basic and crucial part of people's daily existence is a staple meal, item, or activity. For more than half of the world's population, rice is a staple diet.
Is rice the main food consumed by almost half the world's population?The world's major staple meal is rice. Around 80% of the world's population, or more than 50 percent, depends upon rice for food. Almost 95% of the world's rice production is made and eaten in developing nations.
It is one of the most grown crops and is frequently consumed in India. It is suitable for rice farming due to the amount of precipitation, soil fertility, and availability of irrigation. It is a vital source of food and income for the farmers.
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describes the tendency for different types of rock to weather at different rates.
The tendency for different types of rock to weather at different rates is known as differential weathering. This phenomenon occurs due to the varying physical and chemical properties of different rocks.
For example, rocks with a greater porosity and permeability are more likely to absorb water, leading to faster weathering.
In contrast, rocks with low porosity and permeability will not absorb water easily and therefore weather more slowly. Other factors that can influence the rate of weathering include the type of minerals that the rock is composed of and the climate in which it is located. Differential weathering affects the landscape, often leading to the formation of distinctive features such as mesas and canyons.
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all of the following are advantages of using a paleoecological approach except which? question 21 options: insight into the history of change time series easier to reconstruct high temporal resolution landscapes easier to reconstruct
The advantage of using a paleoecological approach is "Insight into the history of change." Therefore the correct option is option A.
Paleoecology is the study of past ecological systems and how they have been affected by changes in climate, geology, and human activity.
The paleoecological approach is used to study the past, and it has many advantages, including insight into the history of change, time series easier to reconstruct, high temporal resolution, and landscapes easier to reconstruct.
However, one disadvantage of using a paleoecological approach is that it does not provide insight into the history of change.
The paleoecological approach can only provide information on the environment's past state, but it cannot provide information on the processes that led to these changes. Therefore the correct option is option A.
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The following question may be like this:
All of the following are advantages of using a paleoecological approach except which :
insight into the history of change time series easier to reconstruct high temporal resolution landscapes easier to reconstructg does the model suggest that increased sst relate to more storms? is the influnce of sst on number of storms statistically significant?
The model suggests that increased SST does relate to more storms. It is likely that the influence of SST on the number of storms is statistically significant, as it has been found in studies that a positive correlation exists between SST and the number of storms in an area.
Higher SST can lead to more frequent and intense storms due to the increased evaporation and the resulting moisture in the atmosphere. This moisture can then be used to fuel more storms.
Additionally, higher SST leads to warmer ocean waters, which provide more energy for storms to form and grow. Overall, this suggests that SST can have a significant influence on the number of storms in an area.
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_______________, are formed when waves carrying silt, sand, or other rock materials deposit their load
Bars, are formed when waves carrying silt, sand, or other rock materials deposit their load.
Bars are formed as a result of the sediments in the water are constantly moving along the shorelines of lakes and oceans with the aid of waves and tides. Due to the high energy waves in the shallow water, waves are continuously reshaping the shoreline and generating sandbars, which are essentially a collection of sand deposited by these waves.
These sandbars frequently occur close to the beach or slightly offshore and are regularly utilized by surfers as a launch platform. In addition, sandbars can develop in other areas, such as in the middle of a river or channel, as a result of moving sediments.A beach is a natural landform that is formed from an accumulation of rocks, sand, or other materials.
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a climate classification based on statistics or other data determined by measurements of observed effects is a(n) question 55 options: empirical classification. genetic classification. combined classification.
An empirical classification based on statistics or other data determined by measurements of observed effects is referred to as an empirical classification. Therefore the correct option is option A.
An empirical classification is a classification that is based on practical experience and observation rather than scientific theory or pure logic.
Empirical data is based on data that has been gathered through observation, experimentation, or experience. It is data that has been obtained from sensory experience rather than from rational analysis or theory.
An empirical classification is a classification system that is based on practical experience and observation rather than scientific theory or pure logic. The classification of climate into various types is one example of empirical classification. Therefore the correct option is option A.
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the large earthquake of 1700 that occurred offshore of the pacific northwest generated a large tsunami. how do we know this?
We know that the large earthquake of 1700 off the pacific northwest generated a large tsunami because of the evidence left behind by this event.
Scientists have found evidence of the tsunami in the form of sand deposits near the coast that are believed to have been caused by the tsunami.
Additionally, oral histories from Indigenous peoples of the area tell of a catastrophic event in 1700 that could have been a tsunami. These histories describe waves that came from the sea and flooded the land.
Other evidence of the tsunami can be found in the form of trees that were snapped off by the waves near the coastline. All of this evidence points to a large tsunami that was generated by the large earthquake of 1700 off the pacific northwest.
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What is the history relations of the United States and Cuba?
Answer:
Cuba and the United States restored diplomatic relations on July 20, 2015. Relations had been severed in 1961 during the Cold War. U.S. diplomatic representation in Cuba is handled by the United States Embassy in Havana, and there is a similar Cuban Embassy in Washington, D.C.
what is the significance of numerous alternating layers of marine and continental formations found in a plateau? provides direct evidence for the theory of cyclic epeirogeny the sedimentary platform must have been elevated one time lack of highly deformed strata casts doubt on multiple cyclic movements
The alternating layers of marine and continental formations seen in a plateau are noteworthy because they give direct evidence for the notion of cyclic epeirogeny.
According to this view, plateaus and other high landforms are the consequence of periodic large-scale vertical motions of the Earth's crust.The sedimentary platform that makes up the plateau must have been uplifted and submerged throughout time as there are alternating layers of marine and continental formations. This is in line with the cyclic epeirogeny theory, which contends that the crust of the Earth experiences periodic elevation and subsidence.The hypothesis of many cyclic motions, however, is called into question by the absence of strongly deformed layers. If the layers had undergone multiple episodes of intense deformation, such as folding or faulting, it would be difficult to distinguish individual layers of sedimentary rock. As a result, the lack of significantly deformed strata shows that the vertical motions that produced the plateau may have been less abrupt and more gradual than previously believed.
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If you sample the water and it has a salinity of 35 ppt where would you be?
If you sample the water and it has a salinity of 35 ppt, you would be in the ocean (or at least somewhere with seawater).
Salinity refers to the amount of salt dissolved in seawater, measured in parts per thousand (ppt). Salinity levels in the ocean can vary depending on the location, season, and other factors. Generally, the ocean has an average salinity of 35 ppt, although this can vary between 30 to 40 ppt in different regions. Therefore, if you sample water with a salinity of 35 ppt, it means that you are most likely in the ocean or a saltwater body with similar salinity levels.
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LICs receive more income when wealthy people from HICs want to visit their unspoiled natural landscape and culture. What is this called?
LICs receive more income when wealthy people from HICs want to visit their unspoiled natural landscape and culture is called tourism.
What is tourism?Tourism refers to the activity of people traveling to and staying in places outside their usual environment for leisure, business, or other purposes. It involves the visiting of new places, experiencing different cultures and traditions, and engaging in various recreational activities.
When wealthy people from high-income countries (HICs) visit low-income countries (LICs) to experience their unspoiled natural landscape and culture, it can generate significant income for the LICs through the tourism industry. This can include revenue from activities such as lodging, transportation, food and beverages, and various attractions and experiences.
The phenomenon you are referring to is called tourism.
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which river was so badly polluted that it caught fire several times? responses nile nile thames thames cuyahoga cuyahoga volga
Answer:
Cuyahoga River
how do metamorphic changes that take place due to recrystallization differ from those that happen due to pressure solution? match the changes to their correct process.
Answer: The metamorphic changes that take place due to recrystallization differ from those that happen due to pressure solution.
Explanation:
Some of the differences between the two processes of metamorphism are explained below:
Recrystallization: The process of changing the mineral structure and texture of a rock is known as recrystallization. Recrystallization is a process that occurs at high temperatures and pressures. The minerals in a rock can become unstable under these conditions and rearrange themselves to form new minerals with larger crystals. This leads to the formation of a new rock with a new structure and texture.Pressure solution: This is a process of metamorphism that occurs when rocks are subjected to pressure. When rocks are subjected to pressure, the mineral grains in them dissolve into each other. This process is called pressure solution. It is a process of metamorphism in which the minerals in a rock dissolve into each other as a result of the pressure that is being applied to the rock. This leads to the formation of a new rock with a new structure and texture.The metamorphic changes that take place due to recrystallization and pressure solution:
Recrystallization refers to alterations in the size, shape, and orientation of minerals within a rock, as well as the creation or modification of minerals.
Pressure solution leads to modifications in the shape and orientation of minerals in the rock, the establishment of a foliation or cleavage, and the arrangement of minerals along a particular plane or direction.
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of the seven continents, which is the only permanently inhabited one that does not currently have a monarchy?
Of the seven continents, Australia is the only permanently inhabited one that does not currently have a monarchy. In Australia, the government operates as a parliamentary democracy and a constitutional monarchy.
The head of state is the monarch of the United Kingdom, who is represented in Australia by the Governor-General. However, the monarch does not have any real power in the country and the government is run by elected officials.
The indigenous Australians were the first inhabitants of the continent, and their cultures and traditions have been respected and preserved by the government.
The legislative branch is made up of the Senate and the House of Representatives, and the executive branch is led by the Prime Minister and the Cabinet. Australia has a strong economy and a high standard of living, and it is recognized as a leader in areas such as healthcare, education, and environmental protection.
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the origin of life on earth most likely occurred group of answer choices before 4.5 billion years ago between 4.5 and 3.5 billion years ago between 2 and 1 billion years ago less than 1 billion years ago
Answer:
The origin of life on Earth most likely occurred between 4.5 and 3.5 billion years ago. While the exact timing of the origin of life is still a subject of active scientific research and debate, the oldest known fossils of microorganisms date back to around 3.5 billion years ago, suggesting that life had already emerged on Earth by that time. Additionally, studies of the Earth's early atmosphere and the geochemical signatures of ancient rocks and minerals provide further evidence that conditions on early Earth were conducive to the formation of simple organic molecules, which may have eventually given rise to the first living organisms.
The origin of life on earth most likely occurred before 4.5 billion years ago. According to scientific research, this is because the early Earth was much different than it is today. The atmosphere lacked oxygen and was filled with high concentrations of toxic gases.
By the time the bombardment ended, it is thought that the Earth had cooled enough for liquid water to form. This water allowed for more complex chemical reactions to occur, and it is thought that this was when life began to emerge.
Overall, the scientific evidence points to the origin of life on Earth likely occurring before 4.5 billion years ago due to the Earth's environment and conditions at the time being hostile to life.
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based upon your analysis, most stratovolcanoes form in which tectonic setting? group of answer choices divergent boundaries oceanic-continental convergent boundaries mantle plumes (hotspots) all of the above
The correct option is All of the above i.e. D. Most stratovolcanoes form in convergent boundaries, which occur when two tectonic plates collide. This collision causes one of the plates to slide beneath the other, creating a subduction zone.
The subducting plate melts due to the extreme pressure and heat created from the collision, resulting in magma being forced upward to form a stratovolcano. Oceanic-continental divergent boundaries can also form stratovolcanoes, as the plate separation creates a rift zone.
Mantle plumes, also known as hotspots, can also form stratovolcanoes when a column of hot material from the mantle rises up through the Earth's crust, creating a weak area of the crust which can then be filled with magma. All of these tectonic settings can create stratovolcanoes. The correct option is All of the above i.e. D.
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