As a result of studying rock strata, scientists have divided the Earth's history into broad groups called eras, which are divided into periods, and these have been divided into epochs.
Avalanches at Rogers Pass in Glacier National Park killed more than 200 people between 1885 and 1910, but they are now controlled if not prevented; cannons
Correct response is: (A)
Avalanches at Rogers Pass in Glacier National Park killed more than 200 people between 1885 and 1910, but they are now controlled if not prevented; cannons are fired at the slopes to make snow masses fall before they become dangerous.
Avalanches at Rogers Pass in Glacier National Park killed more than 200 people between 1885 and 1910?More than 200 people were killed by avalanches at Rogers Pass in Glacier National Park between 1885 and 1910, but today they are at least controlled, if not completely avoided. Cannons are fired at the slopes to cause snow masses to fall before they become deadly.
Over 200 people were killed by avalanches near Rogers Pass in Glacier National Park between 1885 and 1910, but today they are at least controlled, if not completely avoided. The Canadian Armed Forces (CAF) are supporting the Parks Canada avalanche-control program in Rogers Pass, British Columbia, through Operation PALACI. The Canadian Pacific Railway and the Trans-Canada Highway cross the Selkirk Mountains at Rogers Pass. The mission's objective is to prevent naturally occurring avalanches.Learn more avalanches near Rogers Pass Glacier National Park here:
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What is responsible for the belt of desert that covers North Africa, the Arabian Peninsula, Iraq, and Iran
Answer: A zone of dry air circles the planet at roughly 20°-30°N latitude.
Explanation:
_ are large rocks that are not the same as the rock types found in the area and are deposited by the glaciers as they move or melt.
"Erratics" are large rocks that are not the same as the rock types found in the area and are deposited by the glaciers as they move or melt.
What are erratics?Stones and rocks that were carried by a glacier and then abandoned after the glacier melted are known as glacial erratics.
Some characteristics of erratics are-
The bedrock where the glacial erratic is deposited has a distinct lithology from the sort of rock that makes up the glacier erratic.A sandstone boulder moved by a glacier and placed on top of limestone bedrock would be an example of an erratic. Scientists can identify and locate the source outcrop of some erratics because they are made of a particular type of distinguishable rock. In order to recreate historical glacier flow directions, the timing of glacier retreat, and even the type of glacier flow, it is helpful to analyze glacial erratics.Large boulders, tiny stones, and pebbles can all be erratic. Every erratic is made of a unique sort of rock.To know more about the formation of erratics, here
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Contribution margin is first used to cover expenses. Once the break-even point has been reached, contribution margin becomes . (Enter only one word per blank.)
The contribution margin is first used to cover fixed expenses. Once the break-even point has been reached, the contribution margin becomes profit.
What Is Contribution Margin?The contribution margin may be expressed as a gross or per-unit figure. After the variable element of the company's costs are subtracted, it indicates the additional revenue made for each product or unit sold.
The selling price per unit less the variable cost per unit is used to calculate the contribution margin. The measurement, also known as dollar contribution per unit, shows how a specific product affects the company's overall profit.
How is Contribution Margin Calculated?
The difference between a product's sale price and the variable costs related to its manufacturing and selling process is calculated as the contribution margin.
Revenue minus Variable Costs equal contribution margin. The contribution margin ratio is computed as (Revenue - Variable Costs) / Revenue.
What Constitutes a Good Contribution Margin?
The closer the contribution margin is to 100%, the better, as 100% is the ideal contribution margin. The greater the number, the better a corporation is at covering its operating expenses with cash on hand.
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Correct question:
Contribution margin is first used to cover _______ expenses. Once the break-even point has been reached, contribution margin becomes __________. (one word per blank)
Fiscal policy is defined as changes in federal ________ and ________ to achieve macroeconomic objectives such as price stability, high rates of economic growth, and high employment. Group of answer choices
Fiscal policy is defined as changes in federal government spending and taxation to achieve macroeconomic objectives such as price stability, high rates of economic growth, and high employment.
This is further explained below.
What is taxation?Generally, In practically every nation on the planet, governments impose taxes as mandatory levies on people or things.
In conclusion, Modifications made to the spending and taxing policies of the federal government in order to accomplish macroeconomic goals such as price stability, high rates of economic growth, and high employment are examples of fiscal policy.
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What type of tectonic stress produced the geologic structure seen at Veach Gap and the overall tectonic structure of the Massanutten Synclinorium?
The type of tectonic stress that is produced the geologic structure is a compressive stress.
What is tectonic stress?It should be noted that a tectonic stress originates from the ridge push process and is mostly horizontal.
In this case, the type of tectonic stress that is produced the geologic structure is a compressive stress.
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In the accompanying diagram, mLC = 90, mLA = 42, and CA = 10. Which equation can be used to find AB? C 10 42° A
Option D. If mLC = 90, mLA = 42, and CA = 10, the equation that can be used to find AB is [tex]cosine 42 = \frac{10}{AB}[/tex]
How to find ABWe have to find the the way to solve the right angled triangle we have here.
We have the angle at point A.
We have to make use of SOH CAH TOA rule
We would use
Cosine = adjacent / hypotenuse
adjacent = the value 10
The hypotenuse is = AB. This is the sign that is facing the angle.
We would then have the equation to be
Cosine 42° = 10/AB
[tex]cosine 42 = \frac{10}{AB}[/tex]
We can proceed to find AB
To get the value of AB
AB cosine 42 = 10
AB0.7431 = 10
AB = 10/0.7431
= 13.46
The value of AB = 13.46, But the questions only asked us to fing the equation. Hence option D is correct.
The complete question is in the attachment.
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Continental ice sheets were more common 28,000 years ago than they are today because?
Continental ice sheets were more common 28,000 years ago than they are today because the earth was cooler then than now.
An ice sheet is formed by the mass of glacial land ice. It extends more than 50,000 square kilometers. Earth has two continental ice sheets - one which covers the Greenland, the largest island in the world, and the other that covers across the Antarctic continent.
The Antarctic Ice Sheet covers almost 14 million square kilometers and the Greenland Ice Sheet covers about 1.7 million square kilometers. Together, the Antarctic and Greenland Ice Sheets contain more than 99 percent of the land ice on Earth.
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Los Angeles, located in a Mediterranean climate zone, is kept __________ during the summer because of the presence of __________. Group of answer choices wet; the warm California current off the coast wet; mountains along the western side of the city dry; mountains along the western side of the city dry; the cold California current off the coast
Los Angeles, which is in a region with a Mediterranean climate, experiences dry summers because to the presence of the chilly California current off the coast.
What is the Mediterranean climate?Mediterranean climate, a major Köppen climatic type with hot, dry summers and cool, wet winters, is found on the western sides of the continents between 30° and 45° latitude north and south of the equator.
Where is the region with a Mediterranean climate?On the western side of continents, between 31 and 40 degrees latitude north and south of the equator, are roughly where Mediterranean climate zones can be found.
What four traits best describe the Mediterranean climate?The summers there are exceedingly dry and hot. Winters there are chilly and humid. Near the Mediterranean Sea are more than half of the regions with this sort of climate. Unless a mountain or humid weather blocks it, they continue for thousands of kilometers.learn more about Mediterranean climate zone here
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Three distinct slave systems were well entrenched in britain’s mainland colonies. Describe the main characteristics of each system.
The 3 distinct slave systems which were well entrenched in Britain’s mainland colonies is categorized into the following states:
Chesapeake (Vir0ginia, Maryland)South/North Carolina & GeorgiaNew England & Middle ColoniesCharacteristics of slave systems in Chesapeake (Vir0ginia, Maryland)It is based on tobacco.It tended to be smaller.The slaves are closer to white masters.The slavery transformed Chesa into hierarchy of degrees of freedom.Characteristics of slave systems in South/North Carolina & GeorgiaThe majority of population were slaves (more than half by end of 16th century).It based on rice (rice & indigo required large scale cultivation).The task system is one where slaves completed tasks to get leisure time or cultivate own crops.Characteristics of slave systems in New England & Middle ColoniesIt consist of house servants mainly (domestic slaves).Small population of slaves that means slaves presents a lesser threat and this means more freedom for those slaves.Read more about slave systems
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In oceania, __________ is the spiritual power that may reside in persons, places, or things.
In oceania, mana is the spiritual power that may reside in persons, places, or things.
Imagine a scenario in which several lakes have been colonized by marine-origin sticklebacks. In each lake, body armor disappears over time. Which change most likely caused this?.
The change most likely to favor this is Independent, unique mutations occurred in each population that rendered enhancers in the armor pathway useless, which were then favored by natural selection.
What is Natural Selection?Natural selection is the variation in individual survival and procreation brought on by phenotypic variances.The evolution of a population's heritable features across generations is a fundamental mechanism of evolution.By contrasting it with artificial selection, which in his opinion is intentional and natural selection is not, Charles Darwin popularized the phrase "natural selection."Every population of organisms contains variation. This happens in part because an organism's genome might experience random mutations, which its descendants may inherit. Individuals' genetics and environments interact throughout their lifetimes to produce different phenotypes.A genome's environment comprises the abiotic environment as well as the molecular biology of the cell, other cells, individuals, populations, and species.The population changes as a result of individuals with specific variants of the trait having a higher chance of surviving and procreating than those with other, less successful versions.Fecundity selection and sexual selection, which are now frequently included in natural selection, are other factors that affect reproductive success.Know more about Natural selection https://brainly.com/question/9830102
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Question:
I hope you are trying to ask the question below:
Imagine a scenario in which several lakes have been colonized by marine-origin sticklebacks. In each lake, body armor disappears over time. Which change most likely caused this?
a. Independent, unique mutations occurred in each population that rendered enhancers in the armor pathway useless, which were then favored by natural selection.
b. Each population had the exact same mutation in a protein coding gene that produces the armor, which increased in frequency by natural selection.
c. Novel trans-regulatory elements functioned to build new, armorless morphologies that increased in frequency because of gene flow from oceanic populations.
d. Lack of armor reduces fitness, so only genetic drift could cause the armorless condition to increase in frequency.
After returning from his journey west, stephen h. long perpetuated the myth that the region between the missouri river and the rocky mountains was ______.
After returning from his journey west, stephen h. long perpetuated the myth that the region between the missouri river and the rocky mountains was unfit for cultivation.
Stephen Harriman Long (1784–1864) was an American military explorer best known for leading the 1820 expedition to what is now Colorado. On his journey map, he eminently called the arid Great Plains the "Great American Desert".
Even as late as 1823, Major Long of the Army Engineers noted that much of the land between the Missouri River and the Rocky Mountains was "almost wholly unfit for cultivation, and of course uninhabitable by a people depending on agriculture for their subsistence."
Today, the adaptation of technology to semi-arid areas and the development of new technologies have made the Great Plains one of the most productive agricultural regions in the world.
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what are the main agriculture centres in pakistan for cotton?
Answer:
Punjab
Explanation:
being the most conducive for cotton production, produces around 70% of country's cotton followed by
Stop 1. The oldest rocks on this VFE are from the Conococheague Fm from the Cambrian period of geologic time. The Conococheague Fm includes both oolitic limestone and stromatolites. These are both indicators of what type of environment?
"The oldest rocks on this VFE are from the Conococheague Fm from the Cambrian period of geologic time. The Conococheague " These are both indicators of Tropical Climate and Shallow Marine. This is further explained below.
What is Tropical Climate?Generally, The coldest month's average temperature must be at least 18 degrees Celsius (64.4 degrees Fahrenheit) for a climate to be classified as tropical, and hot temperatures prevail throughout the year.
In conclusion, "The Conococheague Fm of the Cambrian era has the oldest rocks on this VFE. The Conococheague Tribe of Indians "Climate and shallow marine environments are both indicative of a tropical climate
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People use the land circled on the map above for __________. A. sheep ranching B. crop farming C. unproductive land D. dairying
People use the land circled on the map above for Crop Farming.
What is Crop Farming?Crop farming is the practice of growing plants for human consumption, animal feed, or other industrial purposes. Crop management can be done using a variety of approaches, including organic production techniques. What are Crops?A plant that may be widely cultivated and harvested for food or profit is considered to be a crop. A crop is what is produced when many plants of the same sort are grown in one location. The majority of crops are grown in aquaculture or agriculture.Crop Farmers evaluate their land and test the soil to see what kinds of crops they can plant, then they whittle that list down to see what would be economically viable.
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What is one important way in which both the moon and mercury are different from earth?
The one important way in which both the moon and mercury are different from earth is through option C. they do not have an atmosphere. Furthermore, Earth contains liquid water in its surface layer, but the Moon does not. Mercury has more metals than the Moon, with a strong iron-nickel core.
What are the major differences in earth, moon and Mercury?Although, the two bodies have significant differences: unlike the moon, Mercury has a global magnetic field; its density is higher; there is an abundance of volatile elements such as sulfur; its surface contains much less iron, particularly in its crustal silicates
Therefore, the correct answer is as given above
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The complete question goes thus:
What is one important way in which both the Moon and Mercury are different from Earth?
a. they are made mostly of frozen gases, not rock
b. they are both much further from the Sun's heat than Earth is
c. they do not have an atmosphere
d. they are both significantly larger than the Earth
e. they both turn on their axes much faster than the Earth
the most inferior division of planet earth in the core, which is liquit at the center because of pressure
Answer:
The outer core
Explanation:
It is made up of iron and nickel, it is in a liquid state despite the pressure because it has a lower melting point than the silicates of the mantle. The inner core, meanwhile, is solid due to the enormous pressure in the center of the planet.
Which are the possible sources for Earth's water? Select all that apply. Group of answer choices the combination of hydrogen and oxygen in Earth's early atmosphere comets the combination of hydrogen from the Sun and oxygen from cyanobacteria volcanic outgassing meteors
The possible source of Earth's water is from the combination of hydrogen and oxygen in Earth's early atmosphere.
What are Water Resources?In the context of a state, "water resources" refers to all surface waters, subsurface aquifers, lakes, reservoirs, or impoundments, whether natural or man-made, that are currently available to or may be made available to users in the agricultural, industrial, commercial, recreational, public, and domestic sectors. The term "Water" or "Waters" refers to any and all water on or beneath the surface of the ground, whether percolating, standing, diffused, or flowing, wholly or partially within this State, or bordering this State and within its jurisdiction, and without limiting the generality of the foregoing, includes natural or artificial lakes, rivers, streams, creeks, branches, forks, brooks, ponds (aside from farm ponds, industrial settling basins and pond.There isn't much free oxygen in the solar system, which is important because the Earth needs oxygen to combine with hydrogen. Oxygen is abundant but not in its elemental or gaseous state since it bonds readily with many other elements. Since oxygen did not exist on Earth until around 2 billion years ago and the planet also has a tendency to lose gaseous hydrogen, it seems doubtful that much water was produced in that way.
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What typically happens to the size, shape, and sorting of clasts as they are transported from steep mountains toward more gentle settings?
The clast become more rounded as they are transported from steep mountains toward more gentle settings.
The clasts make up 20-30% of rocks. Tumbles, bumps, and wear during transportation may reduce the size of the clast, increase its roundness, and cause the clast to be sorted by size. As sediments are transported and deposited, they leave evidence of modes of transport and deposition.
For example, when a vehicle slides down a slope, the resulting sediments are generally chaotic and have varying grain sizes. Grain size and the interrelationship between particles gives the resulting sediment texture. Clasts are classified by density based on the energy of the transport medium. High-energy currents can transport larger fragments. As the energy decreases, heavier particles are deposited and lighter debris is transported further.
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A(n) ______________ is a very large lined hole where waste materials are layered with soil for their disposal. Once full, these holes are capped with several feet of soil and may eventually be used for recreational purposes.
A landfill is a very large lined hole where waste materials are layered with soil for their disposal. Once full, these holes are capped with several feet of soil and may eventually be used for recreational purposes. This is further explained below.
What is a landfill?Generally, Digging up and covering up excavated pits with waste material so that they may be reclaimed.
In conclusion, In order to dispose of garbage, it is necessary to dig a huge hole into which the waste is lowered and covered with earth. These holes will be covered with many feet of earth and utilized for recreational purposes after they are fully filled.
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8. In most of the continental US, what fraction of annual precipitation actually moves directly into streams and rivers as surface runoff (without infiltrating into the ground or returning to the atmosphere via evapotranspiration)?
In most of the continental US, only a third of runoff transfers the continental surplus to balance the deficit of the ocean's fraction of annual precipitation.
Water Cycle and Surface RunoffThe physical geology and topography of the ground as well as meteorological conditions all have an impact on surface runoff. Only approximately a third of precipitation that falls on land drains into rivers and streams before being dumped back into the ocean. The remaining two-thirds either evaporate, transpire, or soak into the earth (infiltrate). Humans have the ability to redirect surface runoff for their own purposes.More and more of the natural environment is being replaced by impermeable surfaces, such as roads, homes, parking lots, and buildings, which decrease groundwater infiltration and hasten runoff to ditches and streams as more people inhabit the planet and as development and urbanization increase.To learn more about Surface Runoff refer to:
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why temperature in cities are much higher than in villages?
Buildings and other structures can store more heat during the day than plants; at night, they emit some of that heat, contributing to warmer temperatures when it's dark out. Cities might also have less reflectiveness, which would let them soak up more of the Sun's heat.
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Magmatic assimilation occurs when
O a rising magma body incorporates broken host rock into the melt.
O a rising magma body runs into another rising magma body underground.
a rising magma body runs into the atmosphere and creates a volcano.
O a rising magma body runs into hard rock that it cannot melt.
Magmatic assimilation occurs when a rising magma body incorporates broken host rock into the melt.
Assimilation is the process of incorporating solid or liquid foreign matter into magma. The term does not imply a specific mechanism, the process depends on many factors such as temperature, magma cooling rate, gas pressure and composition of the material being assimilated.
In most cases, the net result will be a shift from the original composition of the source magma to that of the contaminants. This process of wall rocks being incorporated into magma is called assimilation.
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______ data identifies the primary location where data is collected. Multiple choice question. Source Raw Map Single
Raw data identifies the primary location where data is collected. Hence, the answer is option B. Raw. Read below about Raw Data.
What are raw data?Raw data, also known as primary data, are data collected from a source. In the context of examinations, the raw data might be described as a raw score.
Therefore, the correct answer is as given above.
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Who developed the principle of uniformitarianism?
a. Hutton
b. William Smith
c. Darwin
d. Werner
e. Wegener.
Answer:
Hutton
explanation : Hutton developed the principle of uniformitarianism by observing geological changes in his farm.
Placemarks A through F indicate the locations of six different glacial formations. Which answer correctly identifies each of the formations
placemark A: horn peak
placemark B: arête
placemark C: col
placemark D: tarn
placemark E: cirque
placemark F: hanging valley
these correctly identified each of the formations.
As a glacier expands, it crushes, grinds, and washes rocks, bedrock, and other surfaces as the weight of snow and ice accumulate. The resulting erosional landforms include strips, curls, glacier crests, ridges, trim lines, U-shaped valleys, Roches motonnées, overdrafts, and hanging valleys.
Huge glacier lines can form beneath fast-moving ice flows. These topographies are important for telling the direction and dynamics of ice flow beneath former ice sheets.
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Write about any major mining industry accident that may have occurred around the world and how could that be avoided
On April 26, 1942, the Benxihu (Honkeiko) coal mine in Liaoning Province, China, experienced what is regarded as the greatest mining disaster in history, killing over 1,500 people. This incident occurred during World War II.
What is the main cause of death in coal mining?
With 18 and 5 fatal injuries per occurrence, respectively, contact with objects and equipment and transportation incidents were the most common fatal events. In 2008, there were 4.4 nonfatal injuries and illnesses per 100 full-time workers in the coal mining business, which is 13% more than in the entire private sector.
What are hazards of working in a mine?
Accidents, dust (including poisoning by specific ores), high temperatures and humidity, noise and vibration, toxic gases, and various other hazards are among the dangers mentioned.
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What are possible solutions that may be used in the future to address agricultural issues?
MULTIPLE CHOICE!!!
decrease biodiversity
increase organic farming
decrease the use of chemical agents
develop "cleaner" pesticides
increase fertilizer use
decrease pesticide use
The possible solutions that may be used in the future to address agricultural issues
increase organic farmingdecrease the use of chemical agentsdevelop "cleaner" pesticidesdecrease pesticide useThis is further explained below.What is organic farming?Generally, The term "organic farming" refers to a style of agriculture that makes use of biologically based pest treatments and biological fertilizers that are mostly produced from the waste products of plants and animals, in addition to nitrogen-fixing cover crops.
Development of a "cleaner" pesticides
The first step in the production of a pesticide is the production of a PAI, and the second step is the formulation of the actual pesticide. A PAI is produced by the chemical reaction of two or more raw components, often in the presence of catalysts, solvents, and either acidic or basic reagents.
In conclusion, Boost the use of organic agricultural methods.
Reduce the usage of chemical agents, and work to produce "greener" pesticides.
reduce pesticide use
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Ephemeral streams ________. Group of answer choices are limited to rainshadow deserts are a major agent of erosion in areas of ground moraine flow all the time are a major agent of erosion in desert regions
Ephemeral streams are a major agent of erosion in desert regions.
This is further explained below.
What are Ephemeral streams?Generally, A fleeting river or stream In a normal year, an ephemeral stream is one that only has running water during periods of precipitation and for a brief period of time following those periods. The beds of ephemeral streams are always found to be situated above the water table.
In conclusion, Streams that evaporate quickly are the primary cause of soil decomposition in arid climates.
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