The cases of the West African Sahel and Machakos, Kenya, provide insights into the debates surrounding the causes of environmental change in Africa.
Both regions have experienced significant environmental challenges, but the causes and dynamics differ, reflecting the complexities of environmental change on the continent.
West African Sahel: The Sahel region has faced environmental degradation, desertification, and food insecurity. One debated cause is the role of human activities, such as overgrazing, unsustainable agricultural practices, and deforestation. Critics argue that population growth and resource exploitation contribute to environmental degradation. However, proponents highlight the significance of climatic factors, particularly droughts and changing rainfall patterns, as primary drivers of desertification and land degradation.
Machakos, Kenya: Machakos is known for its success in environmental restoration and community-led initiatives. The region experienced land degradation, soil erosion, and water scarcity. The debates here revolve around the importance of local actions and community resilience. Supporters emphasize the role of community-led efforts, including sustainable land management practices, reforestation, and water conservation. They argue that community empowerment and indigenous knowledge contribute to environmental restoration and improved livelihoods.
These cases highlight the complex interplay between human activities and climatic factors in driving environmental change. While the Sahel debate emphasizes the interaction between natural and anthropogenic factors, the Machakos case underscores the significance of community-led initiatives and local solutions. Both cases demonstrate the need for a holistic understanding of environmental change, considering social, economic, and ecological factors, as well as the importance of context-specific approaches to address the challenges faced in different regions of Africa.
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Provide a full definition of the North Carolina NAD83 (HARN) coordinate reference system (CRS) with EPSG:3358 including the datum and projection. Explain how it is different from the geographic coordinate system WGS84 with EPSG:4326 commonly used by GPS. What are the units for each of these two CRS?
The North Carolina NAD83 (HARN) coordinate reference system is a modern and accurate coordinate system that is well suited for surveying, mapping, and other applications that require precise and reliable location data. It is a regional CRS that covers the state of North Carolina and is based on the North American Datum of 1983 (NAD83).
The North Carolina NAD83 (HARN) coordinate reference system is a modern and accurate coordinate system that is well suited for surveying, mapping, and other applications that require precise and reliable location data. It is a regional CRS that covers the state of North Carolina and is based on the North American Datum of 1983 (NAD83). The system uses the HARN (High Accuracy Reference Network) adjustment to improve the accuracy of the geodetic control network.
The NAD83 (HARN) CRS uses the Lambert Conformal Conic projection (EPSG:3358), which is a conic projection that preserves the shape of small areas while minimizing distortion at mid-latitudes. This projection is well suited for mapping large regions such as states or countries.
The WGS84 CRS with EPSG:4326, on the other hand, is a global geographic coordinate system that is commonly used by GPS. It is based on the World Geodetic System of 1984 (WGS84), which is a global datum that is used to define the shape and size of the Earth. The WGS84 CRS uses latitude and longitude to define locations on the surface of the Earth.
The NAD83 (HARN) CRS uses the US Survey Foot (1.000002 ft) as its unit of measurement, while the WGS84 CRS uses degrees as its unit of measurement for latitude and longitude. The two CRS are different in terms of their projection, datum, and units of measurement. While the NAD83 (HARN) CRS is designed for regional mapping and surveying applications, the WGS84 CRS is a global CRS that is used by GPS and other location-based services.
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what are the types of data layer
Answer:
Explanation:
Relational Database Management Systems (RDBMS): This type of data layer involves storing data in a structured manner using tables, rows, and columns. RDBMS systems like MySQL, Oracle, or PostgreSQL are commonly used to manage and query data.Object-Relational Mapping (ORM): An ORM is a technique that allows developers to interact with a relational database using object-oriented programming. It maps database tables to objects in code, providing an abstraction layer and simplifying database interactions.NoSQL Databases: NoSQL databases, such as MongoDB, Cassandra, or Redis, provide alternative data storage models that differ from the traditional relational database approach. They are designed for handling large volumes of unstructured or semi-structured data, offering high scalability and performance.Data Access Layers: This type of data layer involves the implementation of an intermediary layer between the application code and the actual data storage. It handles tasks like data retrieval, manipulation, and persistence, providing an abstraction for data access.Data Services: Data services offer a layer of abstraction that allows applications to access data through standardized interfaces or APIs. They may involve technologies like web services or RESTful APIs, enabling clients to interact with data regardless of the underlying data storage or technology.Assuming the normal lapse rate, given a temperature of 27.4°c at
sea level, what will the temperature be at 3000 meters?
The temperature at 3000 meters would be 7.9°C.
The lapse rate refers to the rate at which the temperature decreases with increasing altitude. In this context, the "normal lapse rate" indicates the average rate of temperature decrease per unit of vertical distance, typically expressed in degrees Celsius per kilometer or per thousand meters.
It helps estimate the change in temperature at different elevations and is an important factor in understanding atmospheric temperature variations and vertical temperature profiles in various regions.
The normal lapse rate is approximately 6.5°C per 1000 meters of elevation. Therefore, at 3000 meters, the temperature will decrease by (6.5°C * 3) 19.5°C.
So, the temperature at 3000 meters would be 27.4°C - 19.5°C
= 7.9°C.
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How do horizontally layered rocks develop
Explanation:
Answer:
Horizontally layered rocks develop when layers of the rock are flat-lying. This type of topography associated with horizontally layered rocks can result in canyon landscapes when horizontal strata have varying resistance to erosion . The type of strain (deformation) that develops in a rock depends on the initial conditions of the rock , including the composition of the rock and the forces acting upon it. Over time, erosional processes such as weathering and water erosion can erode different layers of the rock at different rates, leading to the development of layered topography.
Explanation:
You are traveling along a left-loterol transform fault and eventually reach a location where the strike of the fault suddenly bends to the left. What type of localized deforn would this bend produce?
The bend in the strike of the fault would produce a compressional deformation known as a restraining bend or a transpressional zone.
This localized deformation occurs as a result of the lateral movement and compression along the fault, leading to the bending and folding of rocks in the vicinity.
Strike, refers to the direction or orientation of a fault line or rock layer in relation to the horizontal plane. It represents the line of intersection between the fault plane or rock layer and a horizontal surface, usually measured as an angle relative to the north direction.
The strike of a fault provides crucial information about its orientation and helps in understanding the overall tectonic processes and structural geology of a region. It is an essential parameter used in geological mapping, fault analysis, and interpreting the deformation history of an area.
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Assume that you have two soils forming under well-drained conditions, one forming on granitic glacial till and the other on basaltic glacial till. Remember spelling matters, double-check. a. The soil formed from would tend to have the higher clay content. This soil will have gone through extensive weathering, resulting in the formation of new minerals. b. The soils formed from will require less potassium fertilizer for agricultural production. During freezing and thawing condition this soil with go through weathering, resulting in increased surface area. c. The soil formed from would have a higher "chroma" (i.e., which soil would be redder). This soil will be redder because it will be enriched with
a. The soil formed from basaltic glacial till would tend to have the higher clay content. This soil will have gone through extensive weathering, resulting in the formation of new minerals.
b. The soil formed from basaltic glacial till will require less potassium fertilizer for agricultural production. During freezing and thawing conditions, this soil will go through weathering, resulting in increased surface area.
c. The soil formed from granitic glacial till would have a higher "chroma" (i.e., it would be redder). This soil will be redder because it will be enriched with iron oxide minerals, which give it a reddish color.
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Which proxy methods can be used for a biostratigraphic study? (Check all that apply.)
Select one or more:
a) Analysis of mineral magnetic properties
b) Clay-varve analysis
c) Pollen analysis (a.k.a. palynology)
d) Chironomid analysis
e) Isotope analysis
f) Diatom analysis
Proxy methods that can be used for a biostratigraphic study are Clay-varve analysis, Pollen analysis (a.k.a. palynology), Isotope analysis, Diatom analysis, and Chironomid analysis. The answer is options b, c, d, e and f.Biostratigraphy is the study of fossils as a tool for dating rocks and understanding the history of life on Earth.
Proxy methods that can be used for a biostratigraphic study are Clay-varve analysis, Pollen analysis (a.k.a. palynology), Isotope analysis, Diatom analysis, and Chironomid analysis. The answer is options b, c, d, e and f.Biostratigraphy is the study of fossils as a tool for dating rocks and understanding the history of life on Earth. It is one of the most effective ways to study the ages of rocks, as well as to make accurate correlations between rocks of different ages from different regions.The stratigraphic succession of biozones in sedimentary rocks is known as biostratigraphy. Paleontologists use various forms of microfossils to establish biozones. The following are the proxy methods that can be used for biostratigraphic study:Clay-varve analysisClay-varve analysis is the study of the thickness and properties of clay layers deposited seasonally in lakes and similar water bodies. It can reveal data on temperature, precipitation, and other environmental factors that can be used to reconstruct the environmental context of the time and place where the rock was formed.Pollen analysis (a.k.a. palynology)Pollen analysis is a proxy method that involves the study of pollen grains and other spores found in sedimentary rocks. This information can be used to determine the ages of rocks and to make correlations between different rock units from different regions. The age of a rock can be estimated by looking at the types of pollen and spores that are present in it.Chironomid analysisChironomid analysis is the study of the larvae of non-biting midges. These tiny insects can be used to reconstruct past temperatures and other environmental conditions. Chironomids are especially useful for studying the history of lakes and other freshwater systems.Isotope analysisIsotope analysis is a powerful tool for determining the ages of rocks and fossils. Isotopes are variations of chemical elements that have different numbers of neutrons in their nuclei. By measuring the ratios of different isotopes in a sample, geologists can determine the ages of rocks and fossils.Diatom analysisDiatom analysis involves the study of the remains of microscopic algae called diatoms. These algae can be used to reconstruct past environmental conditions, such as temperature and salinity. Diatoms are especially useful for studying the history of ocean and coastal environments.
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Experiments of human activities on rivers in mokopane
Explanation:
Human activities, including mining, agriculture, and urbanisation, have led to increased levels of pollution in the river. This has impacted both the water quality and the health of the river's aquatic life. Human activities and development in the region are also a threat to the river.
What would occur if all of the ice on Greenland and Antarctica melted?
a.
glacial transgression
b.
marine transgression
c.
continental transgression
d.
marine regression
e.
continental regression
If all of the ice on Greenland and Antarctica were to melt, it would have significant consequences for the Earth's landmasses and oceans. Hence option B is correct.
The melting of this immense ice would lead to a rise in sea levels globally. Low-lying coastal areas and islands would be particularly vulnerable, facing increased risk of flooding and submersion.
The resulting scenario would be a combination of marine transgression and continental regression. Marine transgression refers to the encroachment of the sea onto land, and this would occur as sea levels rise due to the melting ice. Coastal regions and areas near river mouths would be gradually submerged, leading to the loss of habitats, infrastructure, and the displacement of populations.
At the same time, there would be continental regression, as the newly melted ice would contribute a massive influx of freshwater into the oceans. This could disrupt ocean currents and affect global climate patterns, leading to changes in precipitation, temperatures, and weather conditions worldwide.
Overall, the melting of all ice on Greenland and Antarctica would result in a complex interplay of marine transgression and continental regression, causing widespread and far-reaching impacts on coastal regions, ecosystems, and the global climate system.
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Clue Set #3
This country was once
covered by glaciers.
Has large reserves of coal.
Home of Buckingham
Palace.
Primarily Protestant
Christian nation.
Once had an empire that
covered 1/5 of the world's
land.
Currently a constitutional
monarchy.
Answer:
Britain/United Kingdom
Explanation:
When sea ice melts, it uncovers dark water underneath that absorbs more sunlight than sea ice and leads to increased temperatures and more sea ice melting. This process is known as a ________________ feedback cycle that tends to make a system _______________.
positive; go out of control
positive; remain stable
negative; remain stable
negative; go out of control
The process described in the statement is an example of a positive feedback cycle that tends to make a system go out of control.
What is Positive feedback cycleIn a positive feedback cycle, when there is a change in one part of a system it results into a change in another part which amplifies the initial change.
In this case, the melting of sea ice results into an increased absorption of sunlight by the darker water, which in turn leads to more melting of sea ice. when this cycle continues and amplifies over time, it leads to further melting of sea ice and increase temperatures.
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Answer the following question:
"Is our score a good 'age index' that can be used to tell how
old a volcano is just from its surface features?" and make a graph
with the chart that was given
To determine if the score provided is a good "age index" for estimating the age of a volcano based on its surface features, we would need additional information regarding the specific criteria used to assign scores and the correlation between these scores and actual volcano age. Without such details, it is difficult to make a conclusive judgment.
However, assuming the score represents a comprehensive assessment of various surface features associated with volcano age (e.g., crater morphology, lava flow characteristics, erosion patterns), it could potentially serve as a useful indicator. A higher score would suggest a younger volcano with more distinct and well-preserved surface features, while a lower score may indicate an older volcano with more eroded or weathered features.
To evaluate the relationship between the score and volcano age, a graph can be created to visualize the data. The x-axis of the graph represents the volcano age (in years), while the y-axis represents the score assigned to each volcano. Each data point on the graph corresponds to a specific volcano, with the volcano age plotted against the assigned score.
By plotting multiple data points and examining the trend, we can determine the overall relationship between the score and volcano age. If there is a clear correlation or pattern observed, it would indicate that the score can indeed be a good age index for estimating the age of a volcano based on its surface features. On the other hand, if the data points are scattered or show no apparent trend, it would suggest a weaker relationship between the score and volcano age, reducing its reliability as an age index.
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1.This type of metamorphism occurs adjacent to igneous intrusive bodies:
2 .The parent rock of marble is
3.The parent rock of slate and phyllite is
4.This green colored mica is an index mineral for low grade metamorphism:
The type of metamorphism that occurs adjacent to igneous intrusive bodies is contact metamorphism.
How to explain the informationThe parent rock of marble is limestone. Marble forms through the metamorphism of limestone, which is primarily composed of the mineral calcite. Under high temperature and pressure conditions, the calcite recrystallizes and forms the interlocking grains of marble.
The parent rock of slate and phyllite is shale. Slate and phyllite are both derived from the metamorphism of shale, which is a fine-grained sedimentary rock composed of clay minerals.
The green-colored mica that is an index mineral for low-grade metamorphism is chlorite. Chlorite is a common mineral in low-grade metamorphic rocks such as greenschist.
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what does literature predicts will happen to our water resources
with climate change in South Africa?
The South African government should prepare for the potential effects of climate change on freshwater resources, as well as the possible consequences for the country's citizens.
Climate change has the potential to harm freshwater resources and the ecosystem that supports them in South Africa. With climate change, the quality and quantity of water available in South Africa are projected to deteriorate, according to literature. The country's water cycle is anticipated to change, and droughts, floods, and heat waves are expected to become more severe. Climate change is predicted to reduce surface water supplies, making it more difficult to satisfy the demand for freshwater. Because of the additional water scarcity, other sources of freshwater, such as groundwater, will be stressed, leading to groundwater depletion and deterioration. Furthermore, the quality of freshwater resources may deteriorate, leading to a variety of other issues. As water temperatures increase, algae blooms may become more frequent, leading to additional water pollution and toxic conditions. As a result, the South African government should prepare for the potential effects of climate change on freshwater resources, as well as the possible consequences for the country's citizens.
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1) Atlantic silversides (Menidia menidia) display counter gradient variation in growth rate. During their growing seasons, northern populations grow far faster and larger than their southern counterparts. Why is rapid growth beneficial for northern populations? Why might slow growth be advantageous in southern populations? 2) A population of mice lives in a stable geographic territory. A developer comes along and builds a parking lot in that territory. This developer at least tries to accommodate nature by recreating the nesting ground of the mice in between parking lanes. That is, they place some boxes with straw (the Hilton to mice) throughout the asphalt lot. Yet, mice are repeatedly found dead around and in these artificial environments, but the population a short distance away in the grasslands are fine. There are no new predators, food is ample, and disease is low? What is going on?
Rapid growth is beneficial for northern populations of Atlantic silversides due to several reasons:
a) Shorter growing seasons
b) Enhanced survival and reproduction
c) Energy availability
How to explain the informationOn the other hand, slow growth can be advantageous for southern populations of Atlantic silversides due to the following reasons:
a) Longer growing seasons: Southern populations experience longer summers and milder temperatures, providing them with an extended favorable period for growth and reproduction.
b) Predation pressure: Southern regions may have higher predation pressure compared to the northern regions.
c) Resource limitations: Southern waters may have lower productivity and limited food resources compared to the north.
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population density of indonesia
Answer:
144.79 people per square kilometer
The current population density of Indonesia in 2023 is 144.79 people per square kilometer, a 0.74% increase from 2022.
Explanation:
Question 50
Mexico City is the most populous city in North America
True
False
It is true that Mexico City is the most populous city in North America. It is one of the world's alpha cities, lying at an altitude of 2,240 metres.
Mexico metropolis is the country's capital and largest metropolis, as well as the most populous in North America. It is one of the world's alpha cities, lying at an altitude of 2,240 metres (7,350 feet) in the Valley of Mexico on the high Mexican central plateau. The city is organised into 16 boroughs or territorial demarcaciones, which are further subdivided into neighbourhoods or colonias.
The city proper has a population of 9,209,944 in 2020, with a land area of 1,495 square kilometres (577 square miles).
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Scientists often use the term 'super volcanic eruptions' to describe those eruptions that result in
short-term (1-2 years) cooling of global climate
formation of giant calderas
rapid subduction of oceanic plate in less than 1 month.
massive loss of lives (>100,000 casualties)
Super volcanic eruptions are exceptionally large volcanic eruptions that release a tremendous amount of magma, resulting in the formation of enormous volcanic craters called calderas.
These eruptions are characterized by the expulsion of massive volumes of ash, gases, and pyroclastic material into the atmosphere.
The term 'super' refers to the magnitude and scale of these eruptions, which are far more powerful and devastating compared to typical volcanic eruptions. Super volcanic eruptions can have significant global impacts, affecting the climate, environment, and even human populations.
While super volcanic eruptions can have indirect consequences such as short-term cooling of the global climate due to the injection of volcanic ash into the atmosphere, rapid subduction of oceanic plates, and massive loss of lives, these consequences are not defining characteristics of super volcanic eruptions. The primary defining feature is the formation of giant calderas.
Examples of super volcanic eruptions include the Toba eruption in Indonesia approximately 74,000 years ago and the Yellowstone eruption in the United States around 640,000 years ago.
In summary, the term 'super volcanic eruptions' refers to eruptions that lead to the formation of giant calderas, which are massive volcanic craters. These eruptions release vast amounts of magma and have significant global impacts.
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5) What two quick hand sample tests can be used easily to distinguish limestone from chert? 6) What quick hand sample test or tests can be used to easily distinguish limestone from rock salt?
The two quick hand sample tests that can be used easily to distinguish limestone from chert are fizzing and scratching. When limestone is dropped in acid, it fizzes and forms bubbles of carbon dioxide. Chert, on the other hand, does not fizz when dropped in acid.
The two quick hand sample tests that can be used easily to distinguish limestone from chert are fizzing and scratching. When limestone is dropped in acid, it fizzes and forms bubbles of carbon dioxide. Chert, on the other hand, does not fizz when dropped in acid. Therefore, the fizz test can be used to distinguish limestone from chert.In addition, chert is harder and more resistant to erosion compared to limestone. Therefore, scratching can be used to distinguish the two. Limestone is softer and can be scratched with a knife, while chert cannot be scratched with a knife.The quick hand sample test that can be used to distinguish limestone from rock salt is the taste test. Limestone is composed of calcium carbonate and does not have any taste, while rock salt is composed of sodium chloride and has a salty taste.Therefore, the taste test can be used to distinguish limestone from rock salt.
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examine this map of the continent of africa. At which latitudes
is the atmostphere rising? at which latitudes is it sinking? how
does this atmostpheric circulation influence the contient's
climates
The atmosphere is rising at the equator and sinking at the subtropical latitudes.
The atmospheric circulation pattern influencing the continent's climate is known as the Hadley Cell. At the equator, solar radiation is strongest, causing air to heat up and rise, creating a low-pressure zone. This ascending air forms a band of atmospheric rising motion known as the Intertropical Convergence Zone (ITCZ). As the air rises, it cools and releases moisture, leading to frequent rainfall and lush tropical climates in equatorial regions.
At higher latitudes near 30 degrees north and south, the air that rose at the equator starts to descend. This sinking motion creates high-pressure zones known as subtropical highs, such as the Sahara High in Africa. As the air descends, it becomes warmer, leading to drier and more arid conditions in the subtropical regions.
The combination of rising air at the equator and sinking air at the subtropics sets up a global atmospheric circulation pattern that influences Africa's climates.
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Part 1: Mid-Attantic Ocean Profile chains of volcanoes forin ealiod volcanic ares. the following ordet. 2. Check the box next 10 the Mid-Atlantic Ocean Profile line under the heading Profike tienes 3.
The Mid-Atlantic Ridge (MAR) is a largely underwater mountain range in the Atlantic Ocean that stretches from 87°N (approximately 333km south of the North Pole) to 54°S (subantarctic Bourvet Island). The Mid-Atlantic Ridge (MAR) is a volcanic mountain range that rises from the Atlantic abyss, spanning more than 16,000 km.
From the Arctic (Gakkel Ridge) to the Antarctic (Bouvet Triple Junction). The Mid-Atlantic Ridge is the world's longest mountain range. It spans from North America to beyond the southern tip of Africa along the Atlantic Ocean seabed. It climbs 6,000-13,000 feet (2,000-4,000 metres) above sea level and stretches for 10,000 miles (16,000 kilometres). A hotspot of volcanic activity exists beneath the ridge.
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Question 35
Which of these places in Latin America has a high minority
Indian (from India) population?
o Argentina
o Trinidad & Tabago
o Mexico
o Chile
Question 36
What is the largest aquifer in the US?
o Ogallala
o San Diego
o Floridian
o Edwards
35. The Latin American place that has a high minority Indian population is Trinidad & Tobago. Thus, option B is the correct option.
36. The largest aquifer in the US is the Ogallala Aquifer. Thus, option A is the correct option.
35. Trinidad & Tobago is a Latin American country that has a high minority Indian population. The descendants of Indian indentured laborers make up a significant portion of the population in Trinidad & Tobago, contributing to its cultural diversity.
36. The largest aquifer in the United States is the Ogallala Aquifer. Stretching across eight states, including parts of South Dakota, Nebraska, Wyoming, Kansas, Colorado, Oklahoma, New Mexico, and Texas, it is a vital water source for agricultural, industrial, and domestic use in the region. However, due to extensive pumping and limited recharge, the aquifer is facing challenges of depletion and sustainability, highlighting the importance of responsible water management practices.
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intresting facts about emission nebulae
An emission nebula is a type of nebula in space that emits light of various colors. It is formed when ionized gas, such as hydrogen, emits radiation as a result of being energized by nearby hot stars.
Emission Nebulae:Emission nebulae are regions of interstellar gas and dust in space that emit light of various wavelengths. They are primarily composed of ionized gas, such as hydrogen, and are often associated with regions of active star formation.
They are illuminated by nearby hot stars, whose intense ultraviolet radiation causes the surrounding gas to become ionized. This ionization process excites the atoms and molecules in the nebula, causing them to emit light at specific wavelengths, producing vibrant colors.
The most common emission lines observed in these nebulae are the hydrogen-alpha (H-alpha) and ionized oxygen lines. Emission nebulae are often characterized by their intricate and complex structures, including filaments, loops, and bubbles, which are shaped by the interplay between the intense radiation from the central stars and the surrounding gas and dust.
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Select all the worlds on which we have landed unmanned probes. A. Ganymede B. Europa C. Titan D. The Moon E. lo F. Mars G. Triton H. Venus 1. Jupiter
The different worlds in our Solar System on which we have landed unmanned probes are:A. GanymedeB. EuropaC. TitanD. The MoonE. IoF. MarsG. TritonH. Venus1. JupiterIn conclusion, we have landed unmanned probes on more than one world in our Solar System.
Several unmanned probes have landed on the different worlds in our Solar System. Select all the worlds on which we have landed unmanned probes.The different worlds in our Solar System on which we have landed unmanned probes are:A. GanymedeB. EuropaC. TitanD. The MoonE. IoF. MarsG. TritonH. Venus1. JupiterIn conclusion, we have landed unmanned probes on more than one world in our Solar System.
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If a rock is crystallized from magma created by partial melting, then the rock is: identical in chemical composition to the source rock more mafic than the source rock more felsic than the source rock
If a rock is crystallized from magma created by partial melting, then the rock is more felsic than the source rock.
Hence, the correct answer is option c.
Felsic rocks, also known as silicic rocks, are a type of igneous rock that is rich in silica (SiO2) and aluminum (Al2O3) and low in iron (Fe) and magnesium (Mg). The term "felsic" is derived from the words "feldspar" and "silica," which are the dominant minerals in these rocks.
Felsic rocks are typically light in color, ranging from white to light gray or pink. They have a lower density compared to mafic rocks and are generally less dense than the average continental crust. Common examples of felsic rocks include granite, rhyolite, and obsidian.
Felsic rocks form through the process of partial melting of the Earth's crust or by the fractional crystallization of mafic minerals from a magma. They are associated with continental crust and are often found in mountainous regions and areas of volcanic activity. Due to their high silica content, felsic rocks tend to be more viscous and have lower melting points compared to mafic rocks.
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The given question is not properly written. Hence, the proper question is:
If a rock is crystallized from magma created by partial melting, then the rock is:
a. identical in chemical composition to the source rock
b. more mafic than the source rock
c. more felsic than the source rock
1.A map produced by a local Chamber of Commerce depicts the locational advantages for moving businesses to their town. This might be an example of the use of
A reference maps
B. thematic maps
C navigational maps
D.persuasion/propaganda maps
2.In the days before satellite assisted navigation, a special publication found on board most ocean going vessels titled The Coastal Pilot, assisted the navigator in locating where (most likely) they were making landa Rather than the perspective usually found on maps, the perspective is used in this publication.
A oblique
B. gnomonic
C plan or vertical
D. profile.
This might be an example of the use of D. persuasion/propaganda maps.
In the days before satellite assisted navigation The correct answer is C. plan or vertical.
What is the maps?The map made by a local business organization to show the benefits of moving businesses to their town is considered a type of map that tries to persuade or convince people. These maps are made to encourage people to do something or believe in a certain way.
In this situation, the Chamber of Commerce is using the map to show the advantages of their town as a good place for businesses. They want to attract businesses to move there.
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Which one of the following statements is true?
Fire can be good for the maintenance of forests.
Edaphic factor has no influences on fauna.
Some stable substances (such as DDT) and heavy metals (such as mercury and lead) become concentrated at higher levels of a food chain. This is a good thing for the biota.
In a food pyramid, the total number of organisms tends to decrease as one travels down the trophic levels
The statement is true is that In a food pyramid, the total number of organisms tends to decrease as one travels down the trophic levels.
What is food pyramidIn a food pyramid, the total number of organisms decreases as one moves down the trophic levels this is because energy is lost at each trophic level as it is transferred from one organism to another.
The little fraction of the energy consumed by an organism is converted into biomass that is available for the next trophic level. Hence, the number of organisms decrease as one goes down the trophic levels, since there is no energy large enough for the large population at higher levels.
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The degree to which detrital particles have had their sharp edges and corners smoothed off by abrasion is _____________.
a.
varve
b.
cross-bedding
c.
sorting
d.
rounding
e.
drift
The degree to which detrital particles have had their sharp edges and corners smoothed off by abrasion is called rounding. The abrasion occurs when the particles rub against each other during transportation.
Rounding increases as the distance of transport increases.The more a particle is transported, the smoother and more rounded its edges become. Therefore, the degree of rounding can provide clues to the depositional environment, such as whether the sediment was deposited in a high-energy or low-energy environment.
In a high-energy environment, such as a fast-moving river, the particles are transported further and experience more abrasion, resulting in a higher degree of rounding. On the other hand, in a low-energy environment, such as a lake or a swamp, the particles are not transported as far and therefore are less rounded.
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If the water depth outside the entrance to Humboldt Bay is 26 meters, then what is the speed of the tsunami as it begins to enter Humboldt Bay?
16.0 m/s
28.9 m/s
254.8 m/s
9.8 m/s
837.0 m/s
If the water depth outside the entrance to Humboldt Bay is 26 meters, then the velocity of the tsunami as it begins to enter Humboldt Bay is 16.0 m/s. The correct option is a.
The following formula provides the tsunami's velocity:-
v = (g*h)
Where , v = velocity in m/s
g = 9.8 m/s2 = gravity acceleration
h = water depth in meters
Given, h = 26 m
Hence v = (9.8 x 26) m/s
= 15.96 m/s
or ~ 16 m/s
An object's velocity is defined as both its rate and its direction of motion. Kinematics, the branch of traditional mechanics that describes how bodies move, heavily relies on the concept of velocity. A physical vector quantity called velocity needs to be defined in terms of both magnitude and direction.
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What is the tectonic setting of the Hawaiian Islands?
a. Mid-Ocean Ridge Axis b. Continental lithosphere plate boundary
c. Oceanic Lithosphere moving over a stationary mantle hot spot
d. None of the above
The tectonic setting of the Hawaiian Islands is Oceanic Lithosphere moving over a stationary mantle hot spot.Option C is the correct answer.
Description of Hawaiian IslandsThe tectonic setting of the Hawaiian Islands is Oceanic Lithosphere moving over a stationary mantle hot spot. The Islands are volcanic islands that is located in the middle of the Pacific Ocean. It is formed by a mantle plume, or a stationary hot spot in the Earth's mantle, which lies beneath the Pacific Plate.
The Pacific Plate moves slowly over the hot spot, resulting in a chain of volcanic islands which increase in age from east to west.
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