Answer:
Surface wave
Explanation:
The country of ____ is a volcanic plateau built of basaltic lava erupted from a hot spot underlying the Mid-Atlantic Ridge in the North Atlantic Ocean.
The country of Iceland is a volcanic plateau built of basaltic lava erupted from a hot spot underlying the Mid-Atlantic Ridge in the North Atlantic Ocean.
The country that fits this description is Iceland. Iceland is located in the North Atlantic Ocean and is situated over a volcanic plateau built of basaltic lava erupted from a hot spot underlying the Mid-Atlantic Ridge. This volcanic activity is responsible for the creation of Iceland's unique landscapes, which include geysers, hot springs, and glaciers, among others.
The country is also known for its frequent volcanic eruptions, some of which have had significant impacts on the environment and local communities.
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Which of the following are true of western boundary currents?
Choose all that apply.
deep, as compared to eastern boundary currents
they flow along the more gradual slope of the hill of water
wide, as compared to eastern boundary currents
weak, as compared to eastern boundary currents
fast, as compared to eastern boundary currents
Western boundary currents are deep, fast and wide as compared to eastern boundary currents.
What are western boundary currents?
Western boundary currents are swift, narrow currents that flow along the western edge of ocean basins. They move warm water from the equator toward the poles, much like the Gulf Stream. They flow along the edge of the western continental shelves and are strongly influenced by the continental topography.
Western boundary currents are deep, as compared to eastern boundary currents.Western boundary currents flow along the more gradual slope of the hill of water.Western boundary currents are wide, as compared to eastern boundary currents.Western boundary currents are fast, as compared to eastern boundary currents.
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what is the rock cycle?group of answer choices the cycle that rocks go through when interacting with waterthe transformation of one mineral type to anotherthe transformation of one rock type to anotherthe cycle that rocks undergo when interacting with air
The rock cycle is the process through which rocks are continually changed from one form to another.
This cycle is driven by the action of Earth's tectonic and surface processes, such as erosion and weathering.
Rocks are constantly being recycled through the rock cycle, moving from one form to another and then back again.
The three main types of rocks are igneous, sedimentary, and metamorphic. Igneous rocks form when magma cools and crystallizes. Sedimentary rocks are formed from the weathering and erosion of existing rocks.
Metamorphic rocks are formed when heat and pressure cause existing rocks to change form. All three of these types of rocks can be found in the rock cycle, and they are all interrelated.
The rock cycle is not a linear process. Instead, rocks may move back and forth between different stages of the cycle, or they may undergo multiple changes before being reabsorbed into the environment.
The most common cycle starts with igneous rocks, which are then broken down into sedimentary rocks through erosion and weathering.
Metamorphic rocks are then formed when the sedimentary rocks are exposed to intense heat and pressure. Finally, the metamorphic rocks may be melted down and reabsorbed into the environment.
The rock cycle is an important process for shaping the surface of the Earth, and it is a key part of the Earth's geologic system.
Without the rock cycle, rocks would not be able to be recycled and reused in different forms, and the surface of the Earth would look very different.
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according to the map, most industrialization in europe occurred in the northwest . the production of was profitable throughout western europe. the building of helped transport goods throughout europe. according to the map, the population trend indicates that more people are moving into
According to the map, most industrialization in Europe occurred in the northwest. The production of textiles was profitable throughout Western Europe.
The building of railroads helped transport goods throughout Europe. According to the map, the population trend indicates that more people are moving into urban areas.
To summarize:
- Most industrialization in Europe occurred in the northwest.
- The production of textiles was profitable throughout Western Europe.
- The building of railroads helped transport goods throughout Europe.
- The population trend indicates that more people are moving into urban areas.
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a pyroclastic flow blank . multiple select question. is rarely responsible for volcano-related deaths can move at speeds that exceed 100 m/sec is a mixture of magma, volcanic ash and gas, and air forms when airborne pyroclasts of various sizes begin to rain down upon the ground can reach temperatures of 350o c
A pyroclastic flow is a volcanic ash and gas. the correct answer is: B
A pyroclastic flow can move at speeds that exceed 100 m/sec, is a mixture of magma, volcanic ash and gas, and air, forms when airborne pyroclasts of various sizes begin to rain down upon the ground, and can reach temperatures of 350°C.
However, it is not true that it is rarely responsible for volcano-related deaths.
This statement is incorrect.
What is a pyroclastic flow?A pyroclastic flow is a volcanic event that produces a dense, dangerous cloud of ash, lava blocks, and gas that flows swiftly down the slope of a volcano.
Pyroclastic flows are most commonly associated with volcanic eruptions and can cause a lot of damage and death.
As previously stated, a pyroclastic flow is a mixture of magma, volcanic ash and gas, and air, and it can reach temperatures of 350°C.
The statements which are true regarding the pyroclastic flow are:
It can move at speeds that exceed 100 m/secIt is a mixture of magma, volcanic ash and gas, and air forms when airborne pyroclasts of various sizes begin to rain down upon the ground and can reach temperatures of 350°C. Therefore, the correct answer is B.
It can move at speeds that exceed 100 m/sec, is a mixture of magma, volcanic ash and gas, and air, forms when airborne pyroclasts of various sizes begin to rain down upon the ground, and can reach temperatures of 350°C.
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Two reasons that Britain needed help in the Malay states
when we say that sediment lithifies, we mean that it ______.
Simple-exponential smoothing forecasting models are useful for data which have All of the options are correct. pronounced seasonality. a downward time trend. neither an upward or downward time trend. an upward time trend.
Simple-exponential smoothing forecasting models are useful for data which have C. neither an upward or downward time trend.
When should simple exponential smoothing forecasting be used ?Simple-exponential smoothing forecasting models are a type of time series forecasting technique that uses weighted averages of past observations to predict future values.
These models are best suited for data that does not exhibit a clear trend, either upward or downward. When data have a pronounced seasonality or trend, more advanced time series models may be necessary to make accurate forecasts.
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Base your answers to questions 1 through 4 on the passage and cross section below and on your knowledge of Earth science. The cross section represents a generalized region of the Pacific Ocean along the equator during normal (non-El Niño) conditions. The relative temperatures of the ocean water and the prevailing wind direction are indicated.
El Niño Under normal Pacific Ocean conditions, strong winds blow from east to west along the equator. Surface ocean water piles up on the western part of the Pacific due to these winds. This allows deeper, colder ocean water on the eastern rim of the Pacific to be pulled up (upwelling) to replace the warmer surface water that was pushed westward. During an El Niño event, these westward-blowing winds get weaker. As a result, warmer water does not get pushed westward as much, and colder water in the east is not pulled toward the surface. This creates warmer surface ocean water temperatures in the east, allowing the thunderstorms that normally occur at the equator in the western Pacific to move eastward. A strong El Niño is often associated with wet winters along the northwestern coast of South America and in the southeastern United States, and drier weather patterns in Southeast Asia (Indonesia) and Australia. The northeastern United States usually has warmer and drier winters in an El Niño year.
Compared to non-El Niño years, which climatic conditions exist near the equator on the western and eastern sides of the Pacific Ocean during an El Niño event?
The western Pacific is drier and the eastern Pacific is wetter
The western Pacific is wetter and the eastern Pacific is drier.
The western and the eastern Pacific are both wetter.
The western and the eastern Pacific are both drier
Compared to non-El Niño years, during an El Niño event, the climatic conditions that exist near the equator on the western and eastern sides of the Pacific Ocean are that the western Pacific is wetter and the eastern Pacific is drier.
What is El Niño?El Niño refers to a significant increase in surface sea temperature in the central and eastern tropical Pacific, which occurs every 2–7 years. It is characterized by a change in the ocean-atmosphere system in the tropical Pacific and results in a change in the global climate. The phenomenon is caused by the interaction between the atmosphere and the ocean near the equator. It has an impact on the climate worldwide by altering the atmospheric pressure and ocean currents.
According to the given options, the correct option is: The western Pacific is wetter and the eastern Pacific is drier.
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In which Earth layer are most convection currents that cause seafloor spreading thought to be located?
A) crust
B) asthenosphere
C) outer core
D) inner core
Answer:
A
Explanation:
because crust consists of water
Most convection currents known to be responsible for spreading seafloor are thought to be present on the Earth's crust. As a result, choice (A) is the adequate answer.
What is sea floor spreading?As new oceanic crust is generated through volcanic activity and then slowly drifts away from a mid-ocean ridge, the process is known as seafloor spreading, or seafloor spread.
The idea of plate tectonics uses seafloor spreading to explain continental drift. In the lithosphere, tensional stress leads to cracks when oceanic plates diverge. Although there is often extensive magma activity at spreading ridges, tectonic plate slab force at subduction zones is the driving factor behind seafloor spreading ridges.
In a process known as "ridge push," plates that are not subducting are propelled by gravity as they slide off the higher mid-ocean ridges. A basaltic magma that is at a spreading centre climbs up the cracks and cools on the ocean floor to build a new seafloor.
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How do humans affect the lithosphere? Is this relationship positive, negative, or both? Explain your answer
Answer:trttmme
Explanation:
How old is the Pottsville formation in alabama?
answer:
295 ma
The minimum age of the metatonalite sample provides a maximum depositional age of 295 ma- (master of arts).
over which continent has the majority of global temperature increase occurred over the past millennium? question 2 options: over north america over europe over asia a and b
Over the past millennium, the majority of global temperature increase has occurred over Europe.
Studies indicate that Europe has experienced more warming than any other continent over the last 1,000 years. This warming has been most significant during the last century, with temperatures rising by about 1°C (1.8°F) since the late 19th century.
The warming trend in Europe can be attributed to a combination of natural and human-caused factors. Natural factors, such as solar radiation, volcanic activity, and natural fluctuations in the Earth's climate system, have contributed to the warming trend.
However, human activities, such as the burning of fossil fuels and deforestation, have also had a significant impact on the Earth's climate system.
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angular momentum is thought to play an important role in tornado formation because as the diameter of rotating air is reduced, the wind speeds increase as angular momentum is
The conservation of angular momentum is one of the mechanisms that can lead to a tornado's formation
Angular momentum is thought to play an important role in tornado formation because as the diameter of rotating air is reduced, the wind speeds increase as angular momentum is conserved.How is angular momentum thought to be important in the formation of a tornado?
Angular momentum is thought to be important in the formation of a tornado because as the diameter of the rotating air is decreased, the wind speeds are increased as angular momentum is conserved. This occurs when air is drawn into a thunderstorm and then forced to rotate through the vertical stretching.
The result is a rotating column of air with a very small diameter (typically only a few hundred meters).The conservation of angular momentum is a concept that states that the total amount of angular momentum in a closed system will remain constant.
This means that when the diameter of the rotating air column is decreased, the speed of the rotating air column increases in order to conserve the total angular momentum. This process is important in the formation of a tornado because it results in very high wind speeds that can cause significant damage.
The development of a tornado can be initiated by a combination of several factors such as atmospheric instability, wind shear, and moisture content. The conservation of angular momentum is one of the mechanisms that can lead to a tornado's formation.
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How does climate change affect albedo?
Earth's albedo decreases as the amount of snow and ice covering the surface decreases as a result of melting caused by rising global temperatures.
What factor that affects climate is albedo?The ability to reflect sunlight into space is known as albedo. Sunlight is reflected by deserts, clouds, ice and snow, and aerosols (particles in the air). The more solar energy that is reflected, the higher the albedo; the chillier The albedo is also raised as the ice cover expands as the temperature drops. The growing conditions for alpine grasslands on the TP, where temperature is the primary constraining factor, are improved by increased vegetation coverage, which results in a lower surface albedo and more energy absorbed (Bonan et al. 1992, Betts 2000, Barnes and Roy 2008).
A natural greenhouse effect is the cause of the warm global climate on Earth. Earth's surface is heated by the majority of the Sun's light as it passes through the atmosphere. Infrared radiation is released by the warmed oceans and land. Heat-trapping gases in the atmosphere of Earth absorb some of the infrared radiation.
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After graduating, you and two of your classmates decide to embark on a sailing voyage. Being novices at long-distance sailing, you and your friends decide to tackle something that appears relatively simple. You decide that a round-trip across the Atlantic, starting in North America, would NOT be a bad idea. You decide to leave from North Carolina, where the old boat you bought is located, and travel across to England, then south from there all the way down to Morocco, then back across the Atlantic. You also decide to prepare by digging up your old ISP 203a notes and a map of ocean currents to help you out....1. How do you plan your route there and back, so that the prevailing ocean currents provide the most help? Which currents are these? Draw them and label them on the map on the last page of this handout.2. You know that currents are driven by winds. What are the two major winds that drive the currents you will use in part 1?Getting across to England is a breeze – you can’t believe how easy the trip was, and how quickly it all went by. Now you are ready to head back. You know the trip home will take longer...You are back at sea, just entering the warmer climates to the south, when disaster strikes. Off the CanaryIslands (on your map), your boat capsizes in a storm. Before she sinks, you have just enough time to grab the emergency kit and jump into the inflatable lifeboat. Whew! But...now what??? The current is flowing westward; try as you might, you can’t make the boat go east as you have no sail. So, you’re off across the Atlantic again, although not exactly as you’d planned. This WILL be educational!
The currents you will use are the Gulf Stream, the North Atlantic Drift, the Canary Current, and the North Equatorial Current. The two major winds that drive the currents you will use are west wind and east wind.
To plan your route there and back, you should take advantage of the prevailing ocean currents. The Gulf Stream is a warm and swift ocean current that moves from the Gulf of Mexico, up along the east coast of North America and across the Atlantic towards Europe.
The North Atlantic Drift is an ocean current that moves in the opposite direction of the Gulf Stream and is a weaker current. The Canary Current is a cool and weak ocean current that flows southwards from the west coast of Europe to northwest Africa. Finally, the North Equatorial Current is a warm ocean current that moves westwards across the Atlantic.
The two major winds that drive the currents you will use are the prevailing westerlies, which move from west to east, and the northeast trades, which move from northeast to southwest.
In your situation, the current is flowing westward and you can't make the boat go east as you have no sail. To get back to North Carolina, you should use the Gulf Stream to your advantage and move south-eastward along the edge of the Gulf Stream towards the North Atlantic Drift. From there, you can use the North Atlantic Drift to get across the Atlantic and back to North Carolina.
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Do you notice any parallels between the teachings of confucious and those of other important figures throughout history? If so, what are they
Yes, there are several parallels between the teachings of Confucius and those of other important figures throughout history.
First -One parallel can be seen between Confucianism and the teachings of Aristotle, a Greek philosopher who lived around three hundred years before Confucius. Both Confucianism and Aristotelian philosophy emphasized the importance of virtue and moral character, and both viewed education as instrumental to developing these qualities in individuals. They also both viewed ethical behavior as central to living a good life and maintaining harmonious social relationships.
Second -Another parallel can be seen between Confucianism and the teachings of the Buddha. Like the Buddha, Confucius emphasized the importance of finding a middle path, neither too strict nor too lenient. Both figures also emphasized the importance of self-cultivation and self-reflection in order to improve oneself and better serve others. Additionally, both teachings put a strong emphasis on compassion and treating others with respect.
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examine the images of the grand canyon below. notice that most of the canyon consists of layers of sedimentary rocks, but if you were to hike down into the inner gorge you would encounter the vishnu schist, a metamorphic rock. which of the following processes were involved as the vishnu schist metamorphosed? photograph a shows the grand canyon the inner gorge of the grand canyon, a steep gorge in the deepest part of the canyon with a river at its bottom. photograph b shows the vishnu schist, a dark colored rock outcrop jutting out from one side of the inner gorge. view available hint(s)for part a examine the images of the grand canyon below. notice that most of the canyon consists of layers of sedimentary rocks, but if you were to hike down into the inner gorge you would encounter the vishnu schist, a metamorphic rock. which of the following processes were involved as the vishnu schist metamorphosed? photograph a shows the grand canyon the inner gorge of the grand canyon, a steep gorge in the deepest part of the canyon with a river at its bottom. photograph b shows the vishnu schist, a dark colored rock outcrop jutting out from one side of the inner gorge. eruption and cooling of a lava flow. intense pressure due to regional metamorphism. deposition, burial, compaction, and cementation of sediment. cooling of magma.
The following processes were involved as the vishnu schist metamorphosed photograph b shows the vishnu schist, a dark colored rock outcrop jutting out from one side of the inner gorge eruption and cooling of a lava flow.
The Vishnu Schist found in the inner gorge of the Grand Canyon was formed through intense pressure due to regional metamorphism. This is different from the sedimentary rocks found in the rest of the canyon, which are formed through deposition, burial, compaction, and cementation of sediment. Eruption and cooling of a lava flow and cooling of magma are not processes that were involved in the metamorphosis of the Vishnu Schist.
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identify which features are located within the spiral arms of the milky way and which lie outside the spiral arms.
The features that are located within the spiral arms of the Milky Way include H II regions, open clusters, young stars, molecular clouds, and dust. On the other hand, the features that lie outside the spiral arms include old stars, globular clusters, and dark clouds.
What are spiral arms?Spiral arms are long, narrow regions of spiraling stars, gas, and dust that extend from the center of a spiral galaxy. The Milky Way is a spiral galaxy with at least two major spiral arms and several smaller spiral arms. The spiral arms are responsible for the galaxy's beautiful shape and are the location of active star formation.
What is the location of old stars, globular clusters, and dark clouds?Old stars, globular clusters, and dark clouds are located outside the spiral arms of the Milky Way. These features are found in the galactic halo, which is a diffuse, spherical region that surrounds the galaxy's disk. The galactic halo is composed of old stars, globular clusters, and dark clouds.
What is H II regions?H II regions are regions of ionized hydrogen gas that are created when ultraviolet radiation from hot, young stars ionizes the surrounding gas. H II regions emit light at specific wavelengths, making them visible to astronomers. They are found within the spiral arms of the Milky Way and are a sign of active star formation.
What are open clusters?Open clusters are groups of young, loosely bound stars that are still gravitationally bound to each other. They are typically found within the spiral arms of the Milky Way and are a sign of active star formation. Open clusters can be used to study the properties of young stars and the evolution of star formation.
What are molecular clouds?Molecular clouds are regions of cool, dense gas and dust that are the birthplaces of new stars. They are found within the spiral arms of the Milky Way and are the location of active star formation. Molecular clouds can be studied using radio telescopes, which can detect the radio waves emitted by molecules in the clouds.
What is dust?Dust is a type of small, solid particle that is found throughout the Milky Way. It is composed of carbon, silicon, and other elements and is a key component of interstellar matter. Dust can absorb and scatter light, making it difficult for astronomers to observe stars and other objects in the Milky Way. Dust is found within the spiral arms of the Milky Way and is a sign of active star formation.
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The Weather Channel has managers meet with subordinates to give them feedback all throughout the year. Quarterly, managers meet with subordinates to discuss whether or not specific expectations were met as part of the formal system. a critical incident b comparison с compensation d performance appraisal e work standards
Answer:
Ask your teacher for more explanation
Explanation:
Ranking Task: Kepler's Third Law of Planetary Motion 7 of 9 Part C The foilowing dagrams are the same as those from Parts A and B. This šme, rank the planets from left to right based on their average orbital speed, from fastest to slowest. If you think that two (or more) of the diagrams should be ranked as equal, drag one on top of the other's) to show this equality. (Distances are to scale, but planet and star sizes are not.) View Available Hint(s) Reset Help Fastest Slowest
Ranking Task: Kepler's Third Law of Planetary Motion 7 of 9 Part C: Planets ranked from fastest to slowest based on their average orbital speed are as follows:
Jupiter: As it has the largest distance, it takes a longer time to orbit the sun than the others, but it travels at a much faster pace than the other planets, making it the quickest planet in the solar system.
Mars: It is positioned in the middle of the group, indicating that it is not the quickest or slowest planet, but it is still one of the speediest planets in our solar system.
Venus: It is the second planet from the sun, indicating that it is not the farthest planet from the sun. Its location in the diagram shows that it is closer to the sun than Earth, which is why it travels faster than Earth.
Earth: It is the third planet from the sun, and it is closer to the sun than Mars. As a result, it orbits the sun at a faster pace than Mars.
Saturn: Saturn is the slowest planet in the solar system. The vast distance between Saturn and the sun indicates that it is the slowest planet.
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b) How can remote sensing be of use in disaster management like drought and desertification? drought and desertification? (2×2)
what role does the asthenosphere play in plate tectonics
Answer: lubricating the undersides of Earth's tectonic plates and allowing them to move.
Explanation:
What are the boundaries between tectonic plates that are colliding?
Answer:
Convergent plate boundary
Explanation:
If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the covering plates will move beneath the other, a process known as subduction. Deep trenches are features often formed where tectonic plates are being subducted and earthquakes are common at subduction zones as well.
When gas escapes quickly and violently from lava it may produce a frothy glass full of holes left by former gas bubbles; this porous material, known as pumice, contains so many holes it can float on water.
True or False?
The statement given "When gas escapes quickly and violently from lava it may produce a frothy glass full of holes left by former gas bubbles; this porous material, known as pumice," is true.
Pumice is a porous material that is created when gas escapes quickly and violently from lava, forming bubbles in the molten rock that eventually harden into a solid mass.
Pumice is a light, frothy glass that is filled with many holes that were left by former gas bubbles.
Due to the numerous holes within the material, pumice can float on water. Because of its porosity, pumice has a wide range of uses, including as a polishing abrasive and a lightweight aggregate in concrete.
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OCEAN SURFACE CIRCULATION 1. For each wind arrow, draw an arrow showing the direction of the average water movement due to deflection. 2. The water movement in the ocean is deflected further by the continents. Draw in a single, large dashed circle with arrows showing the resulting circular surface current in the North Atlantic Ocean. 3. What is the direction of the overall water motion? clockwise counterclockwise 4. In what direction does the current you drew flow next to the East Coast of North America? toward the north foward the south 5. Does the water in the Atlantic Ocean moving to the north past the East Coast of North America come from a warmer or cooler climate than the East Coast of North America? warmer cooler 6. Two shdents are discusting the turface currents in the Pocific Ocean in the northern hemisphere Student 1t t think the surface current trovels clockwise. like f dnew to the right, becouse the whal is the same os over the Atlantic Ocean in the northem hemisphere. The cold-woter current is moving south next to the West Coost of North Amenico. Student 2i I think it trovels counterclockwise, like I drew. The Aflantic Ocean is a different ocean thon the Pacific Ocean, so the currents will trovel in different directions. The warm-water current is moving north next to the West Coost of North America. With which student do you agree? Why? 7. Ocean water at beoches in Southern California on the West Coast are much colder than beaches in South Carolina on the East Coost, even though they are located at the same latitude. Explain why, using the direction of the surface currents near each coast. 8. On the world map, draw in the large surface ocean circulation in the northern hemisphere for the Pacific and Atlantic Oceans. Check your answers with Questions 2 and 6. 9. Jopan is on the wentern side of the Pacific Ocean. Fwa students are discussing whiether they would expect ocean water temperatures in Japon to be more similar fo Southorn Colifornia or South Corolina. Student It Southem Colifomia, becouse both Japan and Southern California are in the Abcific Oceon so the same woter circulates between them. Student 2: South Carolina, becouse currents in both locafions are coming from the south, so water temperatures in both areas would be watm from tropical water. With which student do you agree? Why? 10. The Coriolis Effect causes surface currents to go counterclockwise in the southern hemisphere. On the map below draw the surface ocean currents in the southern hemisphere for the Atlantic Ocean and the Pacific Ocean. The surface ocean circulation in the northern hemisphere in these oceans has been drawn with dashed lines for you. 11. Would you expect Chile in the southern hemisphere to have ocean water temperatures more similar to Southern California or South Carolina? Explain your answer.
Answer:
c
Explanation:
How does the character of a rock influence weathering?
Group of answer choices:
a) Minerals that are soluble can be dissolved and reprecipitated and so are resistant to weathering.
b) Rocks that are broken have more surface area and so weather faster.
c) Rocks that are easily weathered and eroded generally form steep cliffs.
d) Fractures and other discontinuities block the entry of water into a rock and so make the rock more resistant to weathering.
e) None of these choices are correct.
a) Minerals that are soluble can be dissolved and reprecipitated and so are resistant to weathering.
How are index minerals used to determine metamorphic grade?
a.Index minerals are specific minerals that dissolve in chemically active fluids in a certain sequence.
b. Index minerals are specific minerals that have formed only at specific times in Earth's history.
c.Index minerals are minerals that occur only in rocks showing specific foliations.
d.Index minerals are specific minerals that form only at specific geographic locations.
e.Index minerals are specific minerals that form at specific temperatures and pressures.
Index minerals used to determine metamorphic grade - Index minerals are specific minerals that form at specific temperatures and pressures. Therefore the correct option is option E.
The process of determining metamorphic grade with index minerals is known as metamorphic facies. The identification of index minerals is an essential method for determining the metamorphic grade of rocks. Index minerals' presence and abundance can indicate the grade of metamorphism undergone by a rock.
Index minerals are minerals that indicate a particular grade of metamorphism, with each mineral being formed at a distinct range of temperature and pressure.
To identify the grade of metamorphism of a rock, geologists use a system known as metamorphic facies. Metamorphic facies are a group of metamorphic mineral assemblages that share a similar mineralogy and temperature and pressure ranges. Index minerals are used to classify metamorphic facies.
Various minerals are used to represent each metamorphic facies, and these minerals are known as index minerals. Metamorphic grade is determined by the occurrence of index minerals that have formed only at specific temperatures and pressures.
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hich approach is currently proving to be the most promising way of determining how life on earth originated? a. studies of martian meteorites b. studies of organisms living around deep-sea ocean vents c. studies of the fossil record d. laboratory simulations of conditions present on the early earth
Among the following approaches, laboratory simulations of conditions present on the early earth is the most promising way of determining how life on earth originated. Hence correct option is D.
What is meant by the approach of laboratory simulations of conditions present on the early earth?It means the study and analysis of the conditions that existed on the early earth and their ability to support the beginning of life.
By making use of chemical reaction simulations and experiments, this approach helps scientists understand how life emerged on earth from non-living substances.
The conditions present on early earth, including the atmosphere, water, heat, and other environmental factors, are replicated and used to test the formation of the building blocks of life, and also their capacity to combine to produce more complicated compounds that might have created life on earth.
Scientists can closely monitor the processes in a laboratory environment, with the ability to regulate various parameters, such as temperature and light. The study of organisms living around deep-sea ocean vents is known as the hydrothermal vent theory.
Martians are believed to have once held life, which then passed to earth via meteorites. However, none of these approaches has provided conclusive evidence of how life originated on earth, making laboratory simulations of conditions present on the early earth the most promising approach among these approaches.
Hence, option D. is correct.
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what does this ancient sedimentary rock rich in iron indicate about the conditions in which it was deposited?
This ancient sedimentary rock rich in iron indicates that the conditions in which it was deposited were likely oxygen-deprived and relatively still.
This is because iron is only able to be deposited and preserved in environments that don't contain significant amounts of oxygen, as it quickly oxidizes in the presence of oxygen.
Also, sedimentary rocks form when sediment is deposited in a relatively still environment, and iron is able to form deposits due to its high density. The environment in which the sedimentary rock was likely deposited was an anoxic (low oxygen) environment, as indicated by its high iron content.
The lack of oxygen and still environment indicates that the ancient environment where this sedimentary rock was deposited was not conducive to life.
In an anoxic environment, there is little to no oxygen to support aerobic organisms, and the still environment would have prevented circulation and the transport of nutrients, making it even less hospitable for life.
The fact that this sedimentary rock contains high levels of iron is a clear indication of the conditions in which it was deposited. This sedimentary rock was likely deposited in an oxygen-deprived and relatively still environment, making it hostile to life.
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