In fractional crystallization within a mafic magma composition, the first mineral to crystallize is likely to be olivine, followed by other minerals in the order determined by Bowen's reaction series.
If a body of magma is subjected to fractional crystallization, the first rock that is expected to crystallize from the magma will likely be one that contains olivine if the magma is of mafic composition. The cooling of magma involves a series of reactions and crystallization processes that can be predicted by Bowen's reaction series, which outlines the order in which minerals crystallize. As the magma cools, the earliest minerals to form are those with the highest melting points; in mafic magmas, this typically includes minerals such as olivine, which crystallize at higher temperatures than other minerals.
For fractional crystallization to occur within a magma chamber, there must be a loss of early-forming minerals from the liquid magma, which can happen if these minerals settle to the bottom of the chamber due to gravity. The process leads to the formation of rocks with different compositions, as the removal of the early crystals alters the chemical makeup of the remaining magma, making it more felsic over time.
The apparent visual magnitude of a star is 7.3. this tells us that the star is
This tells us that that star is one of the brightest in the sky.
The apparent visual magnitude of a star is 7.3. This tells us that the star is not apparent to the human eye.
What is Star?Star is referring to luminous objects or celestial body which shines with their own light, unlike other satellites or planets which take light from Sun to shine In the galaxy.
As a result of our atmosphere's light-scattering characteristics, which distribute sunlight throughout the sky during the day, stars are not visible during those times. As our Sun's photon cloud thickens, it gets harder to see a distant star's weak light.
Even while the stars appear to be stationary, they are actually constantly moving and have been imaginatively associated with figures by ancient sky observers. Simply said, they are too far away for the human eye to see them move.
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Two factors which cause global climate change are listed below.
Factor 1: Mountain building.
Factor 2: Changes in the amount of atmospheric gases.
Which of these statements is correct about the two factors which cause global climate change?
A. Factor 2 is a natural factor and Factor 1 is influenced only by human factors.
B. Factor 1 is a natural factor and Factor 2 is influenced only by human factors.
C. Factor 1 is a natural factor and Factor 2 may be influenced by both nature and human factors.
D. Factor 1 is a human induced factor and Factor 2 may be influenced by both nature and human factors.
I believe the answer is D.) Factor 1 is a human induced factor and Factor 2 may be influenced by both nature and human factors.
HOWEVER: I'm not 100% sure. I'm taking the test at this moment. Just keep in mind, this might not be correct. But, is an educated guess.
Ice wedging is a form of chemical weathering.
T or F
Ice wedging is not a form of chemical weathering. It is a process of physical weathering wherein water seeps into rock cracks, freezes, expands, resulting in further cracking. This is a physical, not chemical process.
Explanation:The statement, 'Ice wedging is a form of chemical weathering,' is False. Ice wedging is actually a form of physical weathering. It takes place when water seeps into the cracks of rocks, freezes and expands.
When the ice melts, it creates larger cracks. These processes repeat over time, resulting in the breaking down of rock substances.
This process does not involve any chemical reactions, thus it falls under physical, not chemical weathering.
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You are writing a book about a 3,030-mile bike race across the United States. You wonder about a title, and how many pedal strokes it takes to finish the race. Assuming a pedal stroke is about 16 feet on average, which of the following would be the best book title?
which ecosystem in the far north runs parallel to the artic shoreline?
how many new rice consumers will be added in Asia in the next 10 years
a. 100,000
b. 1 million
c. 1 billion
d. there will be a decrease in rice consumption.
Answer:
1 billion is gonna be your answer
Explanation:
________ is a measurement of displacement on the fault surface.
The pieces of rock that collect at the bottom of steep slopes are known as
As atmospheric gases warm, they will rise up higher in the atmosphere. The opposites is also true...as atmospheric gases cool down, the air will sink. This occurs over and over and air is heated and cooled. Which of these is the main factor that would contribute to this constant movement of the air?
A) density
B) mass
C) matter
D) electricity
Answer:A
Explanation:
Density is the process by which the air is heated and cooled over and over again. Density is the main factor that contributes to the constant movement of the air. Hence, option A is appropriate.
What is Density?Density is the main way of understanding the process of the limitation and also the ideal way of understanding the ways and means by which the air is being loaded in the self for the understanding of the same. The Density is very compact and also forms the most important part of the understanding of the same.
Density is the sole process by which the atmospheric pressure or the amount of air space that is being provided can be understood. There are even two forms of density one is the relative form of density and the other is the relative form of density.
Relative density is the one that has been covered to understand the nature and also the weight of a substance about the one that is usually the water. Hence, option A is correct.
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What determines how fast sea cliffs form? Select all that apply.
the hardness of the rock that makes up the shoreline
the energy of the waves hitting the shore
the frequency and speed of the wind
the presence of a number of sea caves
How does Europe compare in size to the other continents of the world?
A) It is the second smallest continent.
B) It is the largest continent.
C) It is the smallest continent.
D) It is the second largest continent.
Answer:
A
Explanation:
It is the second smallest continent in the world.
A stream in mountain are that is carved from bedrock is called a
Due to its massive size, climbing Mount Elbrus is a long task. However, if climbing by the standard route, it is one of the easiest of the peaks on the continent to climb. Many climbers and skiers still die every year as they take unconventional routes. The mountain is a part of the Caucasus Mountain range, and it has the highest peak in the mountain range.
Answer:
Culebra cut !
Explanation:
How did the countries of the Arabian Peninsula solve the problem of obtaining their scarcest resource?
They built oil wells and oil pipelines.
They built sailing vessels for fishing and trading.
They built homes from sun-dried bricks.
They built industrial plants to remove the salt from seawater to use it for irrigation and drinking.
Answer:
They built industrial plants to remove the salt from seawater to use it for irrigation and drinking.Explanation:gradpoint
There are many ways to get around a city or town. Sometimes, it's best to walk or to drive. Other times, it's easier to take public transportation. What's your favorite form of transportation in your home town? How could you improve this form of transportation in your neighborhood?
Answer:
There are many forms of transportation to get around, although my favorite would have to be by biking or car. Biking is a very efficient and great way to stay active. There is a slight problem when it comes to biking and that is there is hardly any areas around town that offer a space for biking. I have seen a slight change in some areas which have a biking lane although not all areas in the neighborhood offer this. I believe that there should be a biking lane in almost every area that does not have sidewalks. Another way of transportation is by car. This form of transportation should be limited due to the pollution put out. If a car is in use then it should be used wisely, such as a trip to the grocery store or should carry multiple people within the car that are going to the same place. In conclusion, these are just some of the ways that transportation by car and bike could be improved.
Explanation:
My favorite form of transportation is a bike or scooter. It's a comfortable, good means of transport, and we can drive it even on narrow roads and park it anywhere.
What are the means of transport?The means of transport are vehicles from which we can go from one place to another.
Common means of road transport are cars, auto, buses, trains, etc.
The means of air transport are airplanes and the means of water transport are ships and boats.
Thus, My favorite form of transportation is a bike or scooter. It's a comfortable, good means of transport, and we can drive it even on narrow roads and park it anywhere.
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Which type of plate boundary is most closely associated with the formation of new ocean floor? which type of plate boundary is most closely associated with the formation of new ocean floor? hot spot divergent transform convergent?
New york city is the most visited city in the world.
true or false
Answer:
TRUE
Explanation:
New York is one of the most famous cities in the world, the most visited by tourists (13.67 million visitors in 2018) and with the largest number of tourist attractions, as well as being an excellent option for shopping in the United States.
New York is the most populous city in the United States and the third most in America, behind Sao Paulo and Mexico City. In its streets we can hear over 800 different languages.
Which of the following bodies of water lies between Australia and Papua New Guinea?
Question 9 options:
The Southern Ocean
The Coral Sea
The Tasman Sea
The Torres Strait
Approximately how much of earth's surface is covered by water (1 point)
Uranium-238 (U-238) decays into lead-206 (Pb-206). Which of the following is a true statement?
A.Pb-206 is the parent, and U-238 is the daughter.
B.U-238 is the parent, and Pb-206 is the daughter.
C.A rock sample containing a relatively large amount of U-238 is old.
D.A rock sample containing a relatively small amount of Pb-206 is old.
Answer:
A: U-238 is the parent, and Pb-206 is the daughter
D: A rock sample containing a relatively small amount Pb-206 is old.
Explanation:
Which was likely the most significant cause of the great famine in china between 1959 -'s 1961
A rigid rules and schedules ignored local growing conditions
B resentful farmers refused to work their feilds
C most land in china was not owned by the people
D the food produced was inequitably distributed
The answer is c.
The correct answer is - A rigid rules and schedules ignored local growing conditions.
The great Chinese famine is still discussed nowadays, and what were the actual causes for it. It seems that the strict and not very well thought through policies of the government in that period was the main cause because the planing was terrible, measures for protection of the crops were on a minimum, the amounts of certain product were projected for perfect conditions so any little disturbance would immediately cause a problem with starvation. The government blamed it all on the weather conditions, but it was just cover their terrible policies in the agricultural department. The starvation was so terrible that around 30 million people died and 30 million births were postponed.
What advantage did gymnosperms have over more primitive types of plants?
A. Their seeds had a protective outer coating.
B. They were not limited to growing near water and could therefore spread inland.
C. They were hardy, spore-bearing plants.
D. They resembled pineapple plants with fan-shaped leaves similar to ginkgoes today.
Which is it?
Answer: They were not limited to growing near water
Explanation:
The point within earth from which earthquake wave energy radiates is known by which of the following terms?
The point within Earth from which earthquake wave energy radiates is known as the a. 'hypocenter.'
The hypocenter, or focus, is the exact location beneath the Earth's surface where an earthquake begins. This is the point at which the crust or mantle first ruptures, releasing seismic energy that spreads out in all directions. The hypocenter is always located at some depth within the Earth.
The epicenter is directly related to the hypocenter. It is the point on the Earth's surface that lies vertically above the hypocenter. While the earthquake originates at the hypocenter, the epicenter is often the location where the effects of the earthquake are most strongly felt because it is closest to the source of the seismic energy.
Earthquakes often occur due to the movement along faults in the Earth's crust. According to the elastic rebound theory, stress builds up in rocks on either side of a fault until they eventually snap and release energy, causing an earthquake. This rupture starts at the hypocenter.
Seismology is the study of earthquakes and seismic waves. Seismologists use instruments called seismographs to measure the waves and determine the location of both the hypocenter and epicenter.
Complete Question:
The point within Earth from which earthquake wave energy radiates is known by which of the following terms?
Hypocenter
Epicenter
Elastic Rebound
Fault
Seismology
Cite riscos que o acesso cada vez mais amplo das informações pode trazer às nações.
Geographers studying the effects of climate change might look at the issue on a small __________ by studying how it affects the brush fires in Australia, shown in the image above. A. frequency B. elevation C. scale D. perspective
Answer:
C. Scale
Explanation:
Scientists studying the effect of climate change can make use of wildfires as a simple case study.
Climate change is a global phenomenon because climate have predictable global patterns. Climate is highly affected by the global circulation and movement of air masses from one place to another.
If an activity in America such as burning fossil fuels is on the rise, the effect would not only be localized to that part of the world alone, agents of climates will randomly disperse the burden through a world wide global circulation pattern. This can be felt on a small scale by increasing wildfires in Australia.
Answer:
scale :)
Explanation:
Which two natural resources are available in abundance in the United States? petroleum diesel natural gas gold timber
Rural areas are any areas that aren’t considered “urban.” Please select the best answer from the choices provided. T F
The correct answer is True. Rural areas are indeed defined as any areas that are not considered urban.
Urban areas typically have a high population density and large built-up areas, whereas rural areas have lower population densities and are often characterized by open spaces, agricultural landscapes, and small towns or villages.
The definition of what constitutes an urban or rural area can vary by country and the criteria used by statistical agencies, but the general distinction holds that rural areas are those outside of the urban context.
How does the environment affect genetic factors and gene expression?
The gene expression of the organism may be affected by the environment. This includes the outside ecosphere where the entire creature and organism are situated or progresses, and also as the organism's interior ecosphere, these consist of the aspects of metabolism and hormones. Even though the structure of genes is unaffected by the environment, the gene expression (how the genes work) will be affected. Factors in the environment like drugs, foods, and toxins may result in some epigenetic changes by changing how the DNA bind by the molecules and the structure change of the proteins that the DNA wraps.
Answer:
enviromental conditions can affect gene expression and influence traits
Explanation:
Study island :)
While A-------- is an imagined community of the people who believe themselves to share common culture characteristics, A-_- is a political organized territory with an independent government
An earthquake that occurs within the depth of the earth's crust is called
The geographic grid line 180 degrees of longitude from the prime meridian is the ________.
The geographic grid line 180 degrees of longitude from the prime meridian is the International Date Line.
The geographic grid line 180 degrees of longitude from the prime meridian is the International Date Line. It is directly opposite the prime meridian on the globe and marks where one day transitions to the next. Both lines play crucial roles in the global geographic coordinate system.The geographic grid line 180 degrees of longitude from the prime meridian is the International Date Line. The prime meridian sits at 0 degrees longitude and divides the Earth into the Eastern and Western Hemispheres. The International Date Line is located halfway around the globe at 180 degrees longitude and represents the boundary where one day changes to the next.