scoria cones are composed primarily of ______.
Answers
Scoria cones are almost entirely made of tephra from ejected basaltic rocks. Although bomb-size bits and lava spatter may also be found, lapilli-sized fragments make up the majority of the tephra.
The most frequent kinds of volcanic Scoria cones are cinder cones, also known as scoria cones or pyroclastic cones. They develop as a result of lava pieces being blown into the air by ferocious eruptions, solidifying, and then falling as cinders surrounding the volcanic vent. Layers of pebble-sized or larger cinders and layers of ash make up cinder cones. bigger blocks and explosives from the volcano. The majority are composed of Scoria cones pieces that were ejected from the volcano together with gas-rich magma. Cinder cones have very little strength since they are composed almost entirely of loose particles. The majority of Scoria cones is made up of glassy pieces and might have phenocrysts. An examination of scoria discovered in Yemen revealed that it was mostly made of volcanic glass and a trace amount of zeolites (e.g. clinoptilolite). The Greek word for rust, skria, is whence the word scoria originates.
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Related Questions
What type of fault is being demonstrated in the above illustration?
( )
A Strike-slip fault
B Normal fault
C Reverse fault
Answers
After Dante catches the flu virus, he feels very tired and loses his appetite. His body aches and he gets a high fever.
Which best describes Dante’s symptoms?
Answers
Explanation:
is there multiple choice answers? if there is can u add a picture of the answers
Which of the following areas would not have a low albedo value?
A. Urban areas
B. Forests
C. Bodies of water
D. Deserts
I believe it's A, but I'm not sure.
Answers
Which of the following best explains the reason why different layers of Earth (the core, the crust, and the mantle) are chemically distinct? Select the correct answer below: Earth formed in distinct stages corresponding to each layer, so the chemical makeup of each layer matches the chemical makeup of the interplanetary dust at the time of formation. The deeper the layer, the more nuclear fusion occurs; hence, the elements in the core are denser than those in the mantle, which are denser than those in the crust. The planet was initially a uniform mixture of chemicals that have been undergoing reactions toward a common mixture of products. The hotter core is farther along than the mantle due to a higher reaction rate, and both are farther along than the crust. In the past, when the planet was molten, chemicals separated by density due to the effect of gravity.
Answers
The reason why different layers of the Earth are chemically distinct is because, in the past when the planet was molten, chemicals separated by density due to the effect of gravity.
The Earth's layers—core, mantle, and crust—are chemically distinct due to a process called chemical differentiation, which occurred during the early stages of the planet's formation. When the Earth was in its molten state, heavy elements and compounds sank towards the center due to their higher density, while lighter elements and compounds rose towards the surface. This separation by density created distinct layers with different chemical compositions.
The core, located at the center of the Earth, consists mainly of iron and nickel, which are dense elements. This is because during the differentiation process, these heavy elements sank towards the core, forming a dense metallic region. The mantle, which surrounds the core, is composed of silicate minerals rich in elements like magnesium and iron. Finally, the crust, which is the outermost layer, primarily consists of lighter elements such as oxygen, silicon, aluminum, and other minerals.
The process of chemical differentiation occurred as a result of gravity, which caused the denser materials to sink towards the center and the lighter materials to rise towards the surface. This phenomenon is similar to how oil separates from water due to their different densities. Over time, as the Earth cooled and solidified, the distinct chemical compositions of the layers were preserved.
In summary, the chemical distinctiveness of the Earth's layers is a result of the separation of materials by density during the molten stage of the planet's formation. This process, driven by gravity, led to the formation of the core, mantle, and crust with their respective chemical compositions.
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Read the sentence below and answer the question that follows. Korean farmers use levees to separate and irrigate their rice fields. The word underlined in the sentence above is best defined as __________. A. Flat areas that are cut into the side of hills and used to grow crops B. Rice terraces that usually are carved on the side of a mountain C. Ridges that surround and keep water in irrigated areas D. The spreading of something from one place to another Please select the best answer from the choices provided A B C D
Answers
Answer:
C. ridges that surround and keep water in irrigated areas
Explanation:
levee: A ridge that surrounds and keeps water in an irrigated area.
Answer:
ANSWER IS C!! GOT 100 ON QUIZ!!
Explanation:
How is the earth changing
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sciencephysicsphysics questions and answerssuppose you are trying to cross from the south bank to the north bank of a river in your covered wagon. with all your earthly possessions, you are able to move your wagon at a speed of 1.3 m/s with respect to the water. the crossing is normally perfectly safe, but it's been a warm spring and the snow melt is causing the river to swell to 20.0 m wide and to
Question: Suppose You Are Trying To Cross From The South Bank To The North Bank Of A River In Your Covered Wagon. With All Your Earthly Possessions, You Are Able To Move Your Wagon At A Speed Of 1.3 M/S With Respect To The Water. The Crossing Is Normally Perfectly Safe, But It's Been A Warm Spring And The Snow Melt Is Causing The River To Swell To 20.0 M Wide And To
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Suppose you are trying to cross from the South bank to the North bank of a river in your covered wagon. With all your earthly possessions, you are able to move your wagon at a speed of 1.3 m/s with respect to the water. The crossing is normally perfectly safe, but it's been a warm spring and the snow melt is causing the river to swell to 20.0 m wide and to flow quickly at 1.0 m/s to the west. a) In what direction do you need to aim your wagon if you want to cross the river without drifting downstream or upstream? b) In what direction do you need to aim your wagon if you want to cross the river in the shortest amount of time? How long will it take you to cross in this case?
Answers
The direction in which the wagon should be aimed to cross the river in the shortest amount of time is perpendicular to the direction of the river current, and it will take 12.2 seconds to cross the river.
Given, Velocity of the wagon (vw) = 1.3 m/s Velocity of the river (vr) = 1.0 m/s Width of the river (d) = 20.0 m. To cross the river, we need to find the direction in which the wagon should be aimed to cross the river without drifting downstream or upstream and the direction in which the wagon should be aimed to cross the river in the shortest amount of time. a) To cross the river without drifting downstream or upstream, we should aim the wagon perpendicular to the direction of the river current. This means that the angle between the direction of motion of the wagon and the direction of the river current should be 90 degrees.
b)To cross the river in the shortest amount of time, we should aim the wagon such that the net velocity of the wagon is perpendicular to the direction of the river current. This means that the angle between the direction of motion of the wagon and the direction of the river current should be 90 degrees. To find the net velocity of the wagon, we can use Pythagoras theorem as follows:V^2 = (vw)^2 + (vr)^2V^2 = (1.3)^2 + (1.0)^2V^2 = 2.69V = 1.64 m/s. The time taken to cross the river in the shortest amount of time can be found as follows: Time = distance/velocity Time = 20.0 m / 1.64 m/s Time = 12.2 s. Therefore, the direction in which the wagon should be aimed to cross the river in the shortest amount of time is perpendicular to the direction of the river current, and it will take 12.2 seconds to cross the river.
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Explain the differences between Oceania vs. Eurasia vs. Eastasia
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Oceania, Eurasia, and Eastasia are fictional regions described in George Orwell's dystopian novel, "1984." These regions represent three superstates that are perpetually at war with each other, controlling the world's population and manipulating history to maintain their power.
Oceania is described as encompassing the Americas, the Atlantic islands including the British Isles, and the southern hemisphere, including Australia and New Zealand. Eurasia represents Europe and most of Asia, while Eastasia consists of China, Japan, Korea, and nearby regions.
Each of the superstates in "1984" is characterized by its political system and ideology. Oceania is governed by the authoritarian "Ingsoc" party, which uses propaganda and surveillance to control its citizens. Eurasia is ruled by a totalitarian government that is focused on militarism and conquest, while Eastasia is described as a collectivist society, devoted to industry and technology.
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How did the mining industry affect future industries in the Indian Territory? A. It encouraged miners and settlers to leave the territory. B. It made it more difficult for railroads to continue to grow. C. It provided a labor force for future oil and natural gas industries. D. It decreased opportunities for new small businesses. Please select the best answer from the choices provided A B C D
Answers
Answer:
(C) It provided a labor force for future oil and natural gas industries.
Explanation:
A:
It can't be A, because if miners and settlers had already made their industry in the Indian Territory, it wouldn't encourage miners to leave the area. Instead, the miners and settlers took control of the territory, and forced the Indians away.
B:
It can't be B, because the mining industry wasn't dependent on railroads; neither were railroads dependent on the mining industry.
D:
It can't be D, because the mining industry actually increased opportunities for small businesses!
Drinking water is a part of
Answers
Answer:
Potable water
The oldest fossils on Earth :
a. show that life began in Africa. b. show that life began in lush regions between large rivers. c. show that life began in the oceans. d. are at least 5 billion years old. e. are at most 5 million years old.
Answers
The statement "d. are at least 5 billion years old" is likely not true about the oldest fossils on Earth.
Based on our current understanding of the age of the Earth and the timing of life's emergence, it is highly unlikely that the oldest fossils on Earth are at least 5 billion years old. The Earth itself is estimated to be around 4.6 billion years old, and evidence of life on Earth dates back to around 3.5 billion years ago. Fossils of early life forms, such as stromatolites, microbial mats, and microscopic organisms, have been found in ancient rock formations that formed in marine environments, indicating that life likely originated in the oceans.
Therefore, option d, which suggests that the oldest fossils are at least 5 billion years old, is not supported by scientific evidence.
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Which 4 states in the Southeast do not have coastlines?
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NUMBER 8 PLEASE ANSWER IT ASAP AND WITH COMPLETE SOLUTION!!!
Moist air undergoes a heating and humidification process at a pressure of 101.325 kPa from an initial state of 15°C db and 80% relative humidity to a final state at 22ºC and 60% relative humidity. If the mass flow rate of the air at the initial state is 27.7 kg da/s, what is the increase in the water content of the air? Express your answer in kg/s. In your written solution, draw the process in the psychrometric chart, show the initial and final state and the values obtained from the chart.
Answers
If the mass flow rate of the air at the initial state is 27.7 kg da/s , then the increase in the water content of the air is -0.039648 kg/s.
How to find?The process can be drawn on a psychrometric chart as shown below:
In order to solve the problem, the following steps are to be followed:
Step 1: Find the Humidity Ratio at state 1
The Humidity Ratio (ω1) can be found using the formula:
\(Relative Humidity (RH1) = (ω1/ωsat) × 100\)
Where,
ω1 = Humidity Ratio at State 1
ωsat = Saturation Humidity Ratio at State 1
The value of saturation humidity ratio (ωsat) can be obtained from the psychrometric chart.
ωsat at State 1 corresponds to temperature T1 and 100% relative humidity.
From the chart,ωsat = 0.012 kg water/kg dry air.
Therefore,
RH1 = (ω1/ωsat) × 100
80% = (ω1/0.012) × 100ω1
= (80/100) × 0.012
= 0.0096 kg water/kg dry air.
Step 2: Find the Humidity Ratio at state 2The Humidity Ratio (ω2) can be found using the formula:
RH2 = (ω2/ωsat2) × 100
From the chart,ωsat2 = 0.0136 kg water/kg dry air.
Therefore,
RH2 = (ω2/ωsat2) × 10060%
= (ω2/0.0136) × 100ω2
= (60/100) × 0.0136
= 0.00816 kg water/kg dry air.
Step 3: Find the increase in Humidity Ratio
Increase in Humidity Ratio \((Δω) = ω2 - ω1Δω\)
= 0.00816 - 0.0096
= -0.00144 kg water/kg dry air.
The negative sign indicates that there is a decrease in the water content of the air.
Step 4: Find the Mass flow rate of water
Mass flow rate of water can be found using the formula:
Mass flow rate of water = Mass flow rate of dry air x ΔωMass flow rate of water
= 27.7 x (-0.00144)
= -0.039648 kg/s.
Therefore, the increase in the water content of the air is -0.039648 kg/s.
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The emblem on the flag of the Republic of Tajikistan features a sunrise over mountains below what symbol? Help me!
Answers
Answer:
Emblem of Tajikistan
hope this pic helps you
what is the elevation of the west siberian plain
Answers
Answer:
100 meters to 300 meters
Explanation:
The ecoregion is centered on the West Siberian Plain, a flat lowland that only ranges from 100 meters to 300 meters above sea level.
with the concept of isostasy in mind, how would the elevation of mountains differ if earth’s crust were composed of less dense rocks? mountains would be
Answers
If Earth's crust were composed of less dense rocks, such as granite instead of basalt, the mountains would be higher.
Isostasy is the state of gravitational equilibrium between Earth's lithosphere (the rigid outer layer) and its underlying asthenosphere (the partially molten layer). According to the principle of isostasy, the elevation of mountains is determined by the balance between the weight of the crustal rocks and the buoyant force of the underlying mantle.
If Earth's crust were composed of less dense rocks, such as granite instead of basalt, the mountains would be higher. This is because the less dense rocks would exert less weight on the underlying mantle, resulting in a greater uplift force and higher elevations. Conversely, if the crust were composed of denser rocks, such as iron-rich rocks like those found in the oceanic crust, the mountains would be lower as they would exert greater weight on the mantle, resulting in a lesser uplift force and lower elevations.
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which of the following could provide evidence for the earth being warm in the time period of the faint young sun hypothesis is concerned?
Answers
how can sedimentary rocks become metamorphic rocks
Answers
Answer:
when it gets high pressure
What was the basis of the Jewish claim that Palestine was their homeland?
They were the only settlers in ancient Palestine.
Jews were persecuted and oppressed in the other countries where they had settled.
The Israelites had established a kingdom in ancient Palestine.
The Jews had ruled much of the Middle East before being scattered by conquerors.
Answers
Which of the following areas has removed most restrictions on the movement of people between countries in its
region?
A. Asia
B Europe
C North America
D the Middle East
Please select the best answer from the choices provided
Answers
Answer:
Brainliest pls
Explanation:
B. Europe
Because of its many different colonizing powers, the Caribbean has a great variety of cultural influences.
Truth or false?
Answers
Commercial agricultural, financial investments?
Answers
Commercial agriculture and financial investments might be different but can be linked by the investment into agricultural based commodities.
How are both industries related ?Commercial agriculture necessitates the cultivation of crops and livestock at a significant scale for their sale in the marketplace. Conversely, financial investments are the strategic allocation of resources to different investment vehicles -- including but not limited to stocks, bonds, and commodities— with the expressed aim of generating a financial return on that investment.
Additionally, investors also have the option to invest in agricultural goods such as corn, wheat, and soybeans via futures contracts and various other financial instruments. Such an investment can contribute to stabilizing agricultural markets while simultaneously facilitating reliable sources of income for farmers.
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All of the following are examples of benefits that people receive by altering the Earth’s environmental spheres, except __________. A. the burning of fossil fuels to produce electricity B. the terracing of a hillside C. eutrophication D. the construction of a home
Answers
Answer:
C i just took the test
Explanation:
Answer:
C. eutrophication
Explanation:
HELPPPP
Match each map type to its description. Drag the items on the left to the correct location on the right
Answers
Answer: economic activity map,climate map, physical map, population map, and then political map.
Explanation:
edmentum
The matches of different types of maps along with their accurate descriptions can be made as shown below,
Economic activity map illustrates the different types of natural resources and economic activities of an area;A climate map uses variations in color to show the long term weather patterns of a region;A physical map shows features of the Earth such as elevation,bodies of water, or types of vegetation;Population map uses variations in color to demonstrate the number of people living in certain areas;Political map illustrates the boundaries between states and countries. What is the significance of maps?Maps can be referred to or considered as tool for making representations of relevant information regarding a geographical region. The information may be regarding economic activities, climate, physical traits, population and political limits of the geographical region.
Therefore, the significance regarding maps has been aforementioned.
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where and how might magma be generated in a newly formed collisional mountain belt?
Answers
Magma can be generated in a newly formed collisional mountain belt through the process of subduction.
Subduction occurs when one tectonic plate is pushed beneath another, causing the lower plate to melt and form magma. This magma can then rise to the surface and create volcanoes and other features in the mountain belt.
In a collisional mountain belt, this process can occur in two ways. The first is through the subduction of oceanic crust beneath the continental crust, which can generate magma and create volcanoes along the edge of the continent. The second is through the collision of two continental plates, which can create a thickened crust and cause the lower layers to melt and form magma.
Overall, the generation of magma in a newly formed collisional mountain belt is a result of the subduction and collision of tectonic plates, which can create volcanic activity and contribute to the formation of the mountain belt.
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Air enters a heating section at atmospheric pressure 12 C and a relative humidity of 35% and leaves at a temperature 25. The volume flux entering the heating section is 5 m3/min. Determine the rate of heat transfer to the air in the heating section and the relative humidity of the air leaving the heating section.
Answers
The answer is , the relative humidity of the air leaving the heating section is 84.6%.
How to find?The initial temperature is given as 12°C. To convert it to Kelvin, we add 273.15. 12°C + 273.15 = 285.15
We will use the formula to calculate the rate of heat transfer:
\(q = m . Cp . ΔT\)
Where
q = rate of heat transfer
m = mass flow rate
Cp = specific heat
ΔT = change in temperature.
To calculate the mass flow rate (m), we can use the following formula:
m = volume flow rate x densityρ (density)
= mass/volumeρ
= m/V
= P/RT
Where
P = pressure
R = gas constant
T = temperature
ρ (density) = P/RT
Now, we can calculate the density of air at the inlet:
Density at inlet = P1/RT1
= (1.013 x 10^5)/(287 x (12 + 273))
= 1.12 kg/m³
Volume flow rate at the inlet (V1) = 5 m³/min
= (5/60) m³/s
= 0.083 m³/s
Mass flow rate (m) = volume flow rate x density
m = V1 x ρ1
= 0.083 x 1.12
= 0.093 kg/s
The specific heat of air at constant pressure is-
1.005 kJ/kg KΔT = T2 - T1
= 25 - 12
= 13°C.
Now, we can calculate the rate of heat transfer:
q = m . Cp . ΔT
= 0.093 x 1.005 x 13
=1.225 kW
Using the psychometric chart, the saturation pressure of water vapour at the outlet temperature of 25°C is 3.2 kPa. Thus,
\(Pw2/P'2\) = 3.2/101.3RH2
= Pw2/Total pressure at outlet
= (3.2/101.3) x P'2 / P2RH2
= (3.2/101.3) x (P2 - Pw2) / P2.
Putting values, RH2 = 84.6%.
Thus, the relative humidity of the air leaving the heating section is 84.6%.
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Using reliable sources of information, collect data comparing the population growth of two countries in each of the following regions: Asia, Europe, and Africa. Organize your data into at least three categories, such as birth rates, death rates, and population growth rates. Write a statement about the data for each region. What are the similarities and differences between the data for these regions?
Answers
These differences can be attributed to various factors, including cultural norms, socioeconomic conditions, and government policies regarding family planning and healthcare unropes generally has lower birth rates, leading to population decline or slow growth, while Asia and Africa have higher birth rates, resulting in faster-growing populations.
Asia:
Country 1: China
Birth rate: 11.4 births/1,000 population
Death rate: 7.8 deaths/1,000 population
Population growth rate: 0.36%
Country 2: India
Birth rate: 18.2 births/1,000 population
Death rate: 7.3 deaths/1,000 population
Population growth rate: 1.08%
Statement: In Asia, both China and India have relatively high birth rates compared to the death rates, indicating a positive population growth. However, India experiences a higher birth rate and population growth rate compared to China.
This suggests that India's population is growing at a faster pace than China's.
Europe:
Country 1: Germany
Birth rate: 8.2 births/1,000 population
Death rate: 11.4 deaths/1,000 population
Population growth rate: -0.16%
Country 2: France
Birth rate: 11.9 births/1,000 population
Death rate: 9.1 deaths/1,000 population
Population growth rate: 0.26%
Statement: In Europe, both Germany and France have lower birth rates compared to the death rates, resulting in a negative population growth rate for Germany and a positive but relatively low growth rate for France. This indicates that both countries are experiencing population decline or slow growth.
France, with a higher birth rate than Germany, manages to maintain a slight population growth.
Africa:
Country 1: Nigeria
Birth rate: 36.6 births/1,000 population
Death rate: 8.2 deaths/1,000 population
Population growth rate: 2.58%
Country 2: South Africa
Birth rate: 20.4 births/1,000 population
Death rate: 9.2 deaths/1,000 population
Population growth rate: 0.93%
Statement: In Africa, both Nigeria and South Africa experience higher birth rates compared to death rates, resulting in positive population growth rates.
Nigeria has a significantly higher birth rate and population growth rate than South Africa, indicating a faster-growing population.
This reflects the overall trend in Africa, where many countries are experiencing high population growth rates due to relatively high birth rates.
Similarities across the regions include the positive population growth rates in most countries, indicating higher birth rates compared to death rates.
However, the magnitude of these rates varies greatly between regions and countries.
Europe generally has lower birth rates, leading to population decline or slow growth, while Asia and Africa have higher birth rates, resulting in faster-growing populations.
Additionally, Africa tends to have higher birth rates and population growth rates compared to Asia.
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Elephants are hunted for their ivory tusks. This has led to a decline in the elephant population. Which short-term
change is this an example of?
wildlife hazards
habitat destruction
non-sustainable harvesting
eutrophication
Answers
Answer:
non-sustainable harvesting
Explanation:
Answer:
C
Explanation:
This year was the first for a vessel to sail through the northeast passage. group of answer choices 1911 1992 2001 2007 2018
Answers
1992 was the first for a vessel to sail through the northeast passage.
What is northeast passage?The Northeast Passage connects the Pacific and Atlantic oceans via the Arctic shores of Norway and Russia. The Northwest Passage refers to the western path via Canada's islands.
It oversaw navigation and constructed Arctic ports. During the early stages of World War II, the Soviets authorized the German auxiliary cruiser Komet to use the Northern Sea Route to avoid the British Royal Navy and enter the Pacific Ocean in the summer of 1940.
The Northeast Passage, which runs along Russia's Arctic coast between the Atlantic and Pacific Oceans, is considered Russian territory. The path has been used by the Russians for decades, with the assistance of icebreaker ships.
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Bad weather is normally associated with
1 stable air pressure
2 dropping air pressure
3 high air pressure
4 rising air pressure
Answers
Answer:
Option(2) is the correct answer to the given question.
Explanation:
The barometers are used to determine the air pressure at the present location. If the barometers shows high pressure this simply means that weather is clear also the barometers showing the low pressure that directly proportional to the weather is bad.
In the bad whether there are lots of the chances of raining.All the other options are not correct for the bad weather that's why these are incorrect option .Answer:
dropping air pressure
Explanation:
A.p.e.x