Volcanic tsunamis can be generated by a number of volcanic activities, including
Travel of lahars into the seaUndersea eruptionsLarge amounts of material entering the sea by pyroclastic fallCaldera collapse into the seaViolent outgassing along volcanic vents near sea levelA volcanic tsunami is a type of tsunami generated by volcanic activity, which can occur when a volcano erupts underwater, causing a rapid displacement of water.
The resulting wave can be extremely powerful and destructive, capable of reaching heights of several meters and causing widespread damage to coastal communities.
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which natural hazard occurs more often at active plate boundaries?
Answer:
The most often occurrence is volcanos.
Two types of plates, convergent and divergent can create an active volcano site.
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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where is the kamchatka peninsula, home to 29 active volcanoes?
Answer:
Explanation:
The Kamchatka Peninsula is located in the far eastern part of Russia, in the Russian Far East. It is situated between the Sea of Okhotsk to the west and the Pacific Ocean to the east. The Kamchatka Peninsula is known for its stunning natural beauty, abundant wildlife, and numerous active volcanoes, with a total of 29 active volcanoes located on the peninsula.
Maine, Nevada, and North Dakota do not have large populations. What are some reasons for such small populations
Answer:
Explanation:
I have been to Maine several times. There are two issues about living there.They have hard winters, most of the time. Do not live there if you cannot deal with a long, hard winter. Its good if you can stay inside and write, like Stephen King.
another thing is job diversity because they rely on Lumber, fishing and other natural resources
Complete the description of convergent evolution Match the terms in the left column to the appropriate blanks on the right. Terms can be used once, more than once, or not at all. Reset Help analogous features in distantly Convergent evolution is the evolution of lineages. It occurs when related organisms obtain a needs. Such resemblance is said to be that appeared convergently do not have a trait due to Therefore, species with traits dependent closely shared tralt common ancestor Independent different + similar homologous
Convergent evolution is the process of evolution in which unrelated or distantly related organisms evolve similar traits. This happens as a result of similar environmental pressures, causing the organisms to develop analogous features in order to survive.
Such resemblance is said to be homologous and is independent of any shared ancestry. Traits that appear convergently do not have a closely shared common ancestor, but are instead the result of similar needs resulting in similar traits being formed in different species.
Therefore, species with traits dependent on similar environmental pressures can develop similar characteristics, even if they are distantly related. This process helps to explain why similar features can be seen in distantly related species and helps to recognize the importance of environment over ancestry in the formation of traits.
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fill in the blank question. special rocks found in antarctica are dated with isotopes to give an average age of earth of 4.55 billion years. we can use these dark-colored
Dark-colored rocks found in Antarctica are an important source of information about the age of the Earth. These rocks are dated using isotope techniques to determine their age, which can provide an average age of Earth of 4.55 billion years.
The isotopic dating process involves measuring the relative concentrations of different isotopes in the rocks, which can tell us how long ago they were formed. The process is useful because the relative concentrations of different isotopes remain relatively constant over time, which allows us to accurately measure the age of the rocks.
The data obtained from the rocks helps to provide a more accurate age of the Earth and confirms the scientific theory that the Earth is 4.55 billion years old. Thus, these dark-colored rocks found in Antarctica provide important evidence for the age of the Earth.
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Which of the following statements is true?
a) A region does NOT need to be distinguishable from other areas
b) Regions exist only at some scales
c) Financial networks are not functional regions
d) A region has to be a continuous area
The statement that is true is b) Regions exist only at some scales.
What are regions ?Regions are spatial areas that share common characteristics, whether it be cultural, economic, or physical. However, the definition and boundaries of a region can vary depending on the scale of analysis.
For example, a city can be considered a region at the local scale, but when viewed from a national or global perspective, it may be just a small part of a larger region, such as a state or country. A region typically needs to be distinguishable from other areas to be meaningful and useful in analysis and decision-making.
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changes in agriculture may have contributed to global changes in temperature.
Yes, changes in agriculture have contributed to global changes in temperature.
What is agriculture?Agriculture is the practice of cultivating crops and raising animals for human use and consumption. It involves various activities such as preparing the soil, planting seeds, watering, fertilizing, pest management, and harvesting. Agriculture plays a crucial role in providing food, fiber, and fuel for the world's population. It has been practiced for thousands of years and has undergone significant changes over time, including the use of advanced technologies and scientific methods. Agriculture is essential for economic development and sustainability, and it has the potential to contribute to poverty reduction and food security. However, it also faces challenges such as climate change, land degradation, and water scarcity, which require innovative solutions and sustainable practices to ensure its continued success.
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true or false lithofication is the process in which two plates move towards each other and the denser one slides below the other.
The statement "lithification is the process in which two plates move towards each other and the denser one slides below the other" is False because lithification refers to the process in which sediment is compacted and cemented together to form sedimentary rock.
What is lithification?Lithification is the process by which sedimentary rocks are formed. It is a transformation process that involves the compaction and cementation of sediment to produce solid rock from loose sediment. The process of lithification results in the creation of sedimentary rocks from sediments such as clay, silt, sand, and gravel.
How does lithification occur?Lithification occurs in three stages:
Compaction of Sediments - This occurs when the weight of overlying sediment squeezes the water out of the sediments beneath it. As a result, the sediment becomes denser, and the grains are packed closer together.
Cementation of Sediments - Cementation occurs when mineral crystals are deposited in the small spaces between the sediment grains, gluing them together to create solid rock.
Sedimentary Rocks - Sedimentary rocks are formed when the compacted and cemented sediment becomes hard and forms rock.
Thus, the statement, "Lithification is the process in which two plates move towards each other and the denser one slides below the other," is false.
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21) Which of the following is evidence for supermassive black holes in active galaxies? A) the discovery of powerful jets coming from a compact core.
According to the given question, the evidence for supermassive black holes in active galaxies is the discovery of powerful jets coming from a compact core. This means option A is the correct answer.
What is a supermassive black hole?A supermassive black hole (SMBH) is a type of black hole with a mass ranging from millions to billions of times that of the Sun. These enormous black holes are found at the centers of most galaxies, including our own Milky Way.
They can be observed indirectly by their gravitational influence on surrounding stars, gas, and dust.Theoretical models suggest that active galactic nuclei (AGNs) are powered by supermassive black holes, which release energy by accretion.
These supermassive black holes' gravitational fields are so strong that they can absorb entire stars and gas clouds, creating powerful jets that emit X-rays, gamma rays, and radio waves.In active galaxies.
Your question is incomplete but most probably your full question was:
Which of the following is evidence for supermassive black holes in active galaxies? A) the discovery of powerful jets coming from a compact core
B) rapid changes in the luminosity of the galaxy nucleus
C) quasars emit approximately equal power at all wavelengths from infrared to gamma rays
D) very high speed orbital motions around galactic nuclei
E) all of the above
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which new york state location has surface bedrock that has been subjected to very intense regional metamorphism
The location in New York State that has surface bedrock that has been subjected to very intense regional metamorphism is the Adirondack Mountains.
The Adirondack Mountains are located in the northeastern part of the state and cover an area of approximately 6.1 million acres. The Adirondack Mountains have a complex geology with many different types of metamorphic rocks, such as gneiss, schist, and marble.
The region has been subjected to intense regional metamorphism due to the effects of both folding and faulting. This has resulted in the rocks being folded, faulted, and sheared, which has increased their strength and altered their mineral composition.
The Adirondack Mountains are a prime example of how regional metamorphism can change the shape and composition of rocks over time. The intense regional metamorphism in the Adirondack Mountains has also created a unique landscape, with its high mountains, deep valleys, and many different types of rock formations.
This landscape makes it an excellent spot for outdoor recreation and is home to many parks and protected areas.
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the polar cell is formed by air sinking at the and rising at mid-latitudes.
The given statement that "the polar cell is formed by air sinking at poles the and rising at mid-latitudes" is false.
The polar cell is defined as a system of atmospheric circulation which is characterized by air rising at 60° to 70° latitude and sinking at the poles. This sinking air creates a high-pressure zones at the poles, it is because in the polar regions tend to be dry and cold. The air that sinks at the poles moves towards the equator, where it is deflected by the coriolis effect and becomes the prevailing westerlies. The rising air at the 60° to 70° latitude creates a low-pressure zone, which is why this region tends to be stormy and wet.
Therefore, the polar cell is formed by air sinking at the poles and rising at 60° to 70° latitude, not the other way around.
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The complete question is :
"The polar cell is formed by air sinking at the poles and rising at mid-latitudes. " The statement is true or false ?
according to the multiple nuclei model, an airport is likely to attract nearbyhotels and warehousesretail and wholesale shopsresidences and highwaysuniversities and colleges
According to the multiple nuclei model, an airport is likely to attract nearby residences and highways.
Multiple Nuclei Model, created by C.D. Harris and E.L. Ullman, is a geographic theory that acknowledges the presence of numerous nodes in a city, each having its own unique features.
Each node serves as the nucleus of the city's growth and development. Multiple nuclei model According to the multiple nuclei model, an airport is likely to attract nearby residences and highways, as it is a significant component of the city's economic development.
Since the airport is critical for business growth and creates job opportunities, people prefer to settle near the airport. This leads to the construction of new residential areas and highways near the airport, which facilitates travel to and from the airport.
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Identify from the following list possible environments or conditions that can lead to the formation of clay or silt deposits- chemical weathering of soils- windblown material generated by glaciers- floodplains of river systems- bottoms of lakes- wave action along a beach
Clay or silt deposits can be formed in different environments or conditions. These include floodplains of river systems, bottoms of lakes, wave action along a beach, chemical weathering of soils, and windblown material generated by glaciers.
The floodplains of river systems are environments where clay or silt deposits can form. River floods can carry a significant amount of silt and clay materials, and when the water slows down, these materials can settle and form deposits. This process can occur repeatedly over time, resulting in the accumulation of thick clay or silt layers.
Silt and clay deposits can also form in the bottoms of lakes. The deposition of silt and clay materials in lakes is usually influenced by the volume and velocity of water entering the lake and the nature of the lake basin. When silt and clay materials settle to the bottom of the lake, they can form thick layers over time.
The wave action along a beach can lead to the formation of clay and silt deposits. Wave action can move sediments along the shore and carry them offshore. When the waves slow down, the sediments can settle and form deposits.
Clay and silt deposits can also form due to the chemical weathering of soils. When minerals in the soil are exposed to water and oxygen, they can undergo chemical reactions that transform them into clay and silt materials.
The movement of glaciers can create windblown materials that can form clay or silt deposits. When glaciers move, they can grind rocks into fine-grained sediments. These sediments can be transported by wind and deposited in different environments to form clay and silt deposits.
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sort each statement below into the appropriate bin based on whether it is something that scientists knew about pluto or its moon charon before the new horizons flyby, is something learned as a result of the new horizons flyby, or is something that seems possible from the new horizons mission but for which we'll need additional data to establish it with certainty.
Pluto and Charon are tidally locked: This is something that scientists knew about Pluto and its moon Charon before the New Horizons flyby. Tidal locking occurs when an object's orbital period is the same as its rotational period, meaning that the same side of the object is always facing the other.
In this case, the same sides of Pluto and Charon are always facing each other as they orbit one another. The likelihood of this happening was predicted before the mission based on the distance between Pluto and Charon and the gravitational forces between them, and the New Horizons flyby confirmed this to be the case.
Charon has a tenuous atmosphere: This is something that was learned as a result of the New Horizons flyby. Before the mission, scientists suspected that Charon may have an atmosphere, but data from New Horizons showed that the atmosphere is much more substantial than expected.
The flyby revealed that the atmosphere is composed mostly of nitrogen and methane, and is about 100,000 times thinner than Earth's atmosphere. Additional data is needed to establish the atmosphere's exact composition and other details.
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according to the model in which that active galactic nuclei are powered by supermassive black holes, the energy released as light comes from
Answer:
b
Explanation:
In traveling to the Moon, astronauts aboard the Apollo spacecraft put themselves into a slow rotation to distribute the Sun's energy evenly. At the start of their trip, they accelerated from no rotation to 1 revolution per minute during a 12-min time interval. We can approximate the spacecraft as a cylinder with a mass of 50 metric tons and a diameter of 8.5 m. Calculate the angular acceleration, the torque needed to produce such an acceleration, and the magnitude of the linear acceleration of a point on the skin of the ship 5 min after it started accelerating.
the angular acceleration is α = 0.1047 rad/s².
the torque is τ = 22.837kNm.
The angular acceleration α is given by the equation: α = (2πf)/T, where f is the final angular velocity (in revolutions per minute, rpm) and T is the time interval in which the acceleration occurs. In this case, the final angular velocity is 1 rpm, and the time interval is 12 minutes, so the angular acceleration is
α = (2π(1rpm))/12min
= 0.1047 rad/s².
The torque required to produce such an acceleration can be found using the equation τ = Iα, where I is the moment of inertia and α is the angular acceleration. Since the spacecraft is approximated as a cylinder, the moment of inertia is given by the equation I = (1/2)mr², where m is the mass and r is the radius. Therefore,
I = (1/2)(50mt)((8.5m)/2)²
= 218.75m⁴,
and the torque is
τ = (218.75m⁴)(0.1047rad/s²)
= 22.837kNm.
The magnitude of the linear acceleration a of a point on the skin of the ship 5 minutes after it started accelerating is given by the equation a = αr, where α is the angular acceleration and r is the radius of the ship. Therefore,
a = (0.1047rad/s²)(8.5m)
= 0.89 m/s².
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if you were watching a weather report on the news and saw a blue line with triangles approaching a red line with semi-circles, what type of weather would you expect to see when the two frontal boundaries converge in the midwestern region of the united states?
The blue line with triangles and the red line with semi-circles are symbols used to represent cold and warm fronts, respectively. When these two frontal boundaries converge in the midwestern region of the United States, you can expect to see a period of tumultuous weather.
When a cold front and a warm front collide, the warm air is forced to rise and the cold air is forced to sink. This can cause thunderstorms, hail, high winds, and heavy precipitation. The cold air can also bring an abrupt drop in temperature, making conditions feel colder than normal.
The weather can also be unpredictable when the two fronts collide. Depending on the air pressure, wind direction, and location of the convergence, the weather can drastically change within a short period of time.
The timing of the collision of the two fronts is also important. If the collision occurs during the day, the sun can cause the cold air to be pushed up and warm air to be pushed down. This can lead to instability in the atmosphere, which can cause the formation of thunderstorms.
Overall, the convergence of a cold and warm front in the midwestern region of the United States can cause a wide range of weather, including thunderstorms, hail, high winds, and heavy precipitation. Be sure to stay alert and be prepared for rapidly changing weather conditions when this occurs.
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What is the theory used when examining the stratigraphy in an archaeological excavation?
The theory used to examine the stratigraphy in an archaeological excavation is known as the Law of Superposition. This law states that the deeper an archaeological layer is, the older it is relative to the layers above it.
This is because the newer layers were laid down on top of the older layers, which were already in place. This law is used to help archaeologists date the different layers in an excavation, as well as to identify the relative age of artifacts that are found in the layers.
The Law of Superposition has been an invaluable tool in archaeological excavations, as it has allowed archaeologists to gain a better understanding of the past and how it evolved over time.
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The taiga biome has long, cold, dry winters and cool, wet summers. In three to four sentences, describe how the plants and animals would be impacted by a warm and dry summer and how they might survive. Support your answer with the abiotic factors in the biome.
A warm and dry summer would make it harder for most animals to survive since fewer plants would grow. When the temperatures drop, some animals will hibernate so that they don't starve due to the lack of plants. Other animals have thick hair to fight cold and can dig well to hunt hibernating animals like how foxes dig for rodents under the snow.
the distinctive vertical joints seen in this basalt flow most likely formed as a consequence of which of the following?
The distinctive vertical joints seen in this basalt flow most likely formed as a consequence of thermal contraction. Thermal contraction occurs when hot molten rock cools and contracts upon cooling. As the rock cools, fractures form which create the vertical joints seen in the basalt flow.
Thermal contraction is common in basalt flows and can result in a variety of joint types, depending on the rate of cooling. As the molten rock cools, it contracts and fractures, resulting in a network of vertical and horizontal fractures, which can range in size from millimeters to centimeters. As the rock cools further, these fractures can become more pronounced, resulting in distinct vertical columns of rock.
The rate of cooling of the molten rock is a major factor in determining the size and pattern of the vertical joints in the basalt flow. If the molten rock cools quickly, it contracts more rapidly and thus more fractures form, creating a more pronounced pattern of vertical joints.
Conversely, if the molten rock cools slowly, the contraction is slower and less fractures form, resulting in a less pronounced pattern of vertical joints.
The cooling of the molten rock is also affected by the type of environment it is exposed to. Basalt flows in a temperate environment will cool at a slower rate than those exposed to a colder environment, thus producing a different pattern of vertical joints.
In conclusion, the distinctive vertical joints seen in this basalt flow most likely formed as a consequence of thermal contraction. The size and pattern of the joints is affected by the rate of cooling of the molten rock, as well as the type of environment it is exposed to.
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Please someone explain how to do this
Answer:
i just need pnts
explanation:
im sorry
what land extends from central mexico to costa rica?
The land that extends from central Mexico to Costa Rica is called the Mesoamerican region.
The Mesoamerican region is a cultural and geographical area in the Americas, extending from central Mexico to Costa Rica. This region is known for its rich and diverse cultural history, including the rise and fall of ancient civilizations such as the Maya, Aztec, and Olmec.
According to archeological evidence, the Mesoamerican region is considered to be one of the six cradles of civilization in the world. This region has many natural resources, such as fertile land, forests, and minerals, which made it an attractive area for early civilizations to settle and flourish.
In summary, the land that extends from central Mexico to Costa Rica is called the Mesoamerican region. This region is known for its cultural and geographical significance and was home to ancient civilizations such as the Maya, Aztec, and Olmec.
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what is the deepest inland body of water in the world?
Answer:
Caspian Sea
Explanation:
if you were to visit the grand canyon and hike rim to rim during the summer, the weather would likely be hot and dry with clear, sunny skies. which air mass brings this type of weather to the southwestern region of the united states?
The air mass that brings hot and dry weather to the southwestern region of the United States during the summer is called a continental tropical air mass (CTA). This type of air mass originates in the tropics and is characterized by hot, dry air and clear, sunny skies.
The CTA is formed when the hot, dry air from the tropics encounters a high-pressure system over the southwestern US. This causes the air to become even hotter and drier, resulting in clear, sunny skies and hot, dry weather.
This type of air mass is common in the southwestern region of the United States in the summertime. It is also common in other areas of the world with similar climates, such as the Mediterranean. In the US, the CTA is the primary source of heat during the summer months.
It brings hot and dry weather to the southwestern US, which is often exacerbated by the urban heat island effect.
The CTA is important to understand because it has significant implications for the weather patterns in the southwestern US. During the summer, the CTA can cause temperatures to rise and remain hot and dry for prolonged periods of time, leading to an increased risk of drought.
In addition, the CTA can bring dangerous weather patterns, such as dust storms and thunderstorms, to the region.
Understanding the CTA can help people prepare for the hot and dry weather in the southwestern US during the summer months. Knowing the characteristics of this air mass and how it can affect the weather can help people stay safe and prepare for extreme weather events.
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which description of the earth's magnetic field is most accurate for a person living in champaign-urbana?
The magnetic field of the earth is measured using magnetic poles that are located at the earth's North and South Poles. The magnetic field of the earth is generated by the earth's molten core.
There are a few different ways in which the earth's magnetic field is measured. One of the most common ways is by using a magnetic field strength meter.
For a person living in Champaign-Urbana, the earth's magnetic field would be described as being generally weak. This is because Champaign-Urbana is located relatively close to the earth's equator.
As a result, the magnetic field is not as strong in this region as it is in regions closer to the earth's poles.
In general, the earth's magnetic field is weaker near the equator than it is near the poles. This is because the magnetic field lines are more spread out at the equator, and the magnetic field is less concentrated.
In contrast, near the poles, the magnetic field lines are more tightly packed together, and the magnetic field is more concentrated.
It is important to note that the strength of the earth's magnetic field can also be affected by a number of different factors, such as solar activity and changes in the earth's magnetic field itself.
As a result, the strength of the earth's magnetic field can vary somewhat over time.
In summary, the earth's magnetic field is generally weaker near the equator, which means that a person living in Champaign-Urbana would experience a relatively weak magnetic field.
However, the strength of the earth's magnetic field can also vary over time due to a number of different factors.
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what is the dominant factor in the location of the population settlements in north africa and southwest asia?
The dominant factor in the location of population settlements in North Africa and Southwest Asia is the availability of resources.
These regions are characterized by harsh climates and thirsty geographies, limiting the vacuity of pastoralist land and fresh water. People have settled near gutters, oases and littoral areas as these offer access to water and land suitable for husbandry. In some areas, similar as the Middle East,
oil painting reserves have been a major factor in the position of agreements, as they give an profitable source of income. In other areas, similar as the Maghreb, mortal agreements have been established in areas with a more temperate climate, allowing for further varied foliage and a more different range of resources.
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which of the following plots most accurately shows the temperature distribution in the solar system at the time of planet formation?graphs: A. steadily increasing line. B. steadily decreasing line. C. straight line. D. increasing
The steadily decreasing line most accurately shows the temperature distribution in the solar system at the time of planet formation. The correct option is B.
The temperature distribution in the solar system at the time of planet formation is best represented by the steadily decreasing line.
The steadily decreasing line accurately shows the temperature distribution in the solar system at the time of planet formation, where the temperature was steadily decreasing.
The temperature in the solar system, at the time of planet formation, was steadily decreasing due to the absence of the sun.
The Sun, which is the primary source of heat in the solar system, had not yet formed, and the temperature was cold.
The temperatures in the solar system were very low, and dust and gas were slowly cooling. It was at this time that the dust and gas began to collapse into clumps, which later led to the formation of planets.
The steadily decreasing line represents the temperature distribution of the solar system at the time of planet formation.
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which process is represented by the diagram shown? Germination, fertilization, mitotic cell division, meiotic cell division
Meiotic cell division is the process by which a cell divides in two, resulting in four haploid cells, each with half the genetic material of the original. During meiosis, cells undergo recombination and exchange genetic material, resulting in genetically distinct offspring.
select the statements that correctly describe a cause or process of spreading earth's seafloor. A. magma rising from the mantle forms new oceanic crust. B. tidal forces from the moon stretch the seafloor, slowly pulling it apart. C. rising ocean temperatures reduce the density of parts of the oceanic crust, allowing these areas to expand. D. strong ocean currents moving in opposite directions erode and thin areas of the oceanic crust. E. earth's tectonic plates move apart. F. earth's strong magnetic field forces magnetic minerals within the oceanic crust to align and separate.
The statements that correctly describe a cause or process of spreading earth's seafloor are that magma rising from the mantle forms a new oceanic crust and the earth's tectonic plates move apart. The correct options are b and e.
Divergent plate boundaries cause seafloor spreading. Heat in convection currents in the mantle makes the earth's crust more flexible and less dense as tectonic plates progressively migrate apart. Less dense material rises, generating mountains or elevated areas of the seafloor.
Tensional stress generates fractures in the lithosphere when oceanic plates diverge. The driving factor for seafloor spreading ridges was tectonic plate slab movement at subduction zones, instead of magma pressure, however magma activity is common near spreading ridges.
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