What composition of magma is basalt made from primarily? Ultramafic Mafic Intermediate Felsic Question 28 When magma cools, it is generally the silicon and carbon that link together first. True False

Based on the given statements and questions, here are the correct answers:

What would the detection of both transverse S-waves and longitudinal P-waves from "Europa-quakes" tell us about Europa?

Europa has a molten core.

Why do strato-volcanoes have steep sides?

Their magma comes from melted crust that is high in silica.

Why is Mercury's uncompressed density much greater than Earth's uncompressed density?

Mercury's iron core is a much higher percentage of its total mass compared to Earth.

Why does the Lunar Maria have fewer craters than the Highlands?

The lava that created the Maria covered up the older impact craters.

Why are the astronauts in the International Space Station (ISS) weightless?

The astronauts and the ISS are falling around the Earth.

If it takes Mars 3 billion years to cool down and become geologically inactive, how long would it take the Earth?

6 billion years.

Please note that these answers are based on the information provided in the statements and questions.

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The Central Zone of the Limpopo Belt in southern Africa has a complicated geological past and has experienced changes in its rocks through heat and pressure.

The Limpopo Belt is an important line that separates old and ancient land from more recent land  in the area. The Central Zone was formed by several changes and produced different types of rocks in the belt.

Greenstone Belts: The Limpopo Belt has a few groups of rocks called greenstone belts. These rocks are made up of both volcanic and sedimentary types and went through a change due to heat and pressure, but not too severe.

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Iceland is located on the Mid-Atlantic Ridge, which is a divergent plate boundary where the North American and Eurasian tectonic plates are moving apart.

This makes Iceland unique because it is essentially a manifestation of a mid-ocean ridge that is exposed on land. The volcanic activity in Iceland is associated with the spreading of the tectonic plates, resulting in the formation of new crust.

In addition to the divergent boundary, Iceland also experiences the effects of a transform boundary, where the plates slide horizontally past each other. This is evident in the presence of numerous active faults and fractures across the island.

Furthermore, Iceland is influenced by the subduction zone boundary, where the Eurasian plate is subducting beneath the North American plate in the northern part of the country. This subduction process is responsible for the formation of volcanic arcs and stratovolcanoes.

The combination of these three plate boundaries within a relatively small geographic region makes the plate tectonic setting of Iceland unique and gives rise to its distinctive volcanic activity and geothermal features.

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17. According Hudson, to the present-day outline of the Great Lakes was formed roughly 9,000 years ago. Option A is the correct option.

23. According to Hudson ( Chapter 14), True, Basic Oxygen Process mixes molten pig iron with scrap steel in a furnace which pure oxygen is blown into under low pressure.

The Great Lakes are a group of five connected freshwater lakes in border between the United States and Canada: Lake Superior, Lake Michigan, Lake Huron, Lake Erie, and Lake Ontario. The Great Lakes play a crucial role in the economy, ecology, and recreation of the surrounding regions, including, fishing, and waterfront tourism.

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The correct statements among the options provided are:

1. The tilt of the Earth's axis of rotation varies from 23.5 to 0 in such a way as to bring more heating per hour in the summer than in the winter.

2. The tilt of the Earth's axis sometimes causes one hemisphere to receive longer hours of sunlight per day compared to the other hemisphere.

These two factors are the primary reasons for the occurrence of different seasons on Earth:

1. The tilt of the Earth's axis: The Earth's axis is tilted at an angle of approximately 23.5 degrees relative to its orbit around the Sun. This tilt results in varying exposure to sunlight as the Earth orbits the Sun. When one hemisphere is tilted toward the Sun, it receives more direct sunlight and experiences longer daylight hours, leading to warmer temperatures and

2. The Earth's orbit: The Earth's orbit around the Sun is not perfectly circular but slightly elliptical. However, the distance between the Earth and the Sun during different seasons is not the primary cause of the seasonal variations. The tilt of the Earth's axis is the dominant factor responsible for the seasons.

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1. The main difference between magma and lava is their location. Magma is molten rock beneath the Earth's surface, while lava is magma that reaches the Earth's surface during a volcanic eruption.

2. The dominant difference between felsic and mafic rocks is their mineral composition. Felsic rocks have a higher percentage of silica (SiO2) and aluminum (Al2O3), while mafic rocks have higher levels of iron (Fe) and magnesium (Mg).

3. Gabbro and diorite are both intrusive igneous rocks. Gabbro is composed mainly of dark-colored minerals like pyroxene and plagioclase feldspar, while diorite consists of a combination of dark and light minerals such as amphibole and plagioclase feldspar. The main difference is in their mineral composition.

4. Geologists classify igneous rocks based on their mineral composition, texture (grain size and arrangement), and origin (intrusive or extrusive). This classification helps in understanding the rock's formation processes and provides insights into the Earth's history and geologic activity.

5. The Bowen Reaction Series is a sequence of mineral crystallization in cooling magma or lava. It shows the order of minerals that form as the magma/lava cools and their respective temperatures of crystallization. The series demonstrates how minerals with higher melting points solidify first, followed by those with lower melting points, providing insights into the formation of different igneous rock types.

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The given question is not properly written. Hence, the proper question is:

"Answer the following Questions Clearly.

1. What is the difference between magma and lava?

2. What is the dominant difference between felsic and mafic rocks?

3. What are Gabbro and Diorite? How do they differ?

4. How do geologists classify igneous rocks?

5. What is Bowen Reaction Series?"

The three natural disasters that cause the most deaths in the U.S. since 1986: Tornados, Storm Surge, and Floods. Thus. option A is appropriate.

Any disaster with ties to natural risks is considered a natural disaster. A natural disaster can result in human casualties or property destruction, and it frequently leaves behind economic losses. The extent of the destruction depends on the population's fortitude and the infrastructure's condition.

All forms of severe weather, that have the potential to pose a serious threat to property, vital infrastructure, and homeland security, are considered natural disasters.

A natural disaster is an unplanned incident that hurts society. Natural catastrophes frequently cause damage to both the environment and the population.

Thus, option A is correct.

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Data mining is the process of discovering patterns and trends in large datasets. The data is often collected from a variety of sources and is used to uncover hidden relationships, anomalies, and other insights that can be used to make better decisions.

One real-life example of data mining is Amazon's recommendation system. When a customer makes a purchase on Amazon, the website collects data about the product, such as the product name, category, and price. It then uses this data to make personalized product recommendations to the customer. The system analyzes the customer's purchase history and behavior, such as the pages they've viewed and the products they've added to their cart, to determine what products they're most likely to be interested in. This process is done using data mining techniques to uncover patterns and trends in the data that can be used to make better product recommendations.

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If all the Ice in the Greenland and Antarctica ice sheets melted, by approximately 77m the global sea level would rise around the world. The correct option is c.

If all of the ice in the Greenland and Antarctic ice sheets melted, global sea level would increase by around 77 meters. The fundamental cause of the increase in melting of ice sheets in Antarctica, Greenland, and glaciers is global warming and climate change, which is mostly caused by increased greenhouse gas emissions from unsustainable human activities.

If glaciers melt, sea level rise will be uneven and may vary from place to place. Though not as soon as possible, if all of Greenland's ice melts, global sea level will increase by around 7 meters around the planet. If all of the Antarctic ice melts, global sea level will rise by around 70 meters.

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Key global factors or trends that have hindered progress in achieving global drinking water coverage include population growth, urbanization and contamination.

The global population has been steadily increasing, leading to greater demands for water resources. This puts pressure on existing water sources, making it difficult to meet the increasing demand for drinking water. The lack of proper planning and investment in water supply systems for urban areas has hindered progress in providing access to safe drinking water for urban populations.

Many regions across the globe are experiencing water scarcity due to various factors such as climate change, droughts, and overexploitation of water resources. Water pollution from industrial activities, inadequate wastewater treatment, agricultural runoff, and improper disposal of waste can contaminate water sources, making them unsafe for drinking.

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The igneous intrusion K intruded into sedimentary layers A and B before the tilt of the sedimentary layers A-H.

This can be inferred based on the principle of cross-cutting relationships in geology. According to this principle, a rock unit (in this case, the igneous intrusion K) that cuts across or intrudes into another rock unit (sedimentary layers A and B) is younger than the rocks it intrudes.

In this scenario, the sedimentary layers A and B were already in place when the igneous intrusion K occurred. After the intrusion of K, there was a subsequent event that caused the tilt of the sedimentary layers A-H. Therefore, the intrusion of K happened before the tilting event, as it cross-cuts the sedimentary layers A and B but does not show any evidence of being affected by the tilting process.

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In crowded conditions, trees tend to allocate more energy to lateral growth and branching, resulting in a shorter overall height than trees in open areas.

The correct statement about the spatial distribution of biomass is: "Compared to open stands, plants in crowded conditions tend to grow shorter."

In crowded conditions, plants often face competition for resources such as light and nutrients. They, therefore, allocate more energy to vertical growth to gain available light, resulting in taller plants in open supports. In contrast, in crowded conditions, where trees are surrounded by other individuals, they tend to invest more in lateral growth and branching, which reduces overall height. 

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The stability of the environment in the environmental temperature profile

below from 0-5km? Assume the parcel at the surface is unsaturated is b. Unstable

The stability of the environment is determined by the environmental lapse rate, which is the rate at which the temperature of the atmosphere decreases with altitude. If the environmental lapse rate is less than the dry adiabatic lapse rate, then the environment is unstable.

This means that an unsaturated air parcel that is lifted will cool at a slower rate than the surrounding air, causing it to become buoyant and rise further.

In the environmental temperature profile given in the question, the temperature decreases from 20°C at the surface to 16°C at 5 km.

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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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The Central Zone of the Limpopo Belt, located in southern Africa, is a region known for its complex geological history and the formation of a variety of rock types through metamorphism.

The Limpopo Belt is part of the larger Pan-African orogenic system, which represents a series of mountain-building events that occurred during the assembly of the supercontinent Gondwana around 1 billion years ago.

The metamorphic evolution of the Central Zone of the Limpopo Belt can be attributed to the collision and subsequent interaction of several continental blocks. The main rock types found in the belt include gneisses, granites, migmatites, amphibolites, and various types of metamorphic rocks.

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The rock cycle is a continuous process in which rocks are transformed from one type to another through processes such as melting, cooling, weathering, erosion, sedimentation, and metamorphism.

The rock cycle is a continuous process that describes the transformation of rocks from one type to another through various geological processes. It involves three main rock types: igneous, sedimentary, and metamorphic.

The cycle begins with igneous rocks, which are formed from the cooling and solidification of molten magma or lava. When magma cools and solidifies underground, it forms intrusive igneous rocks with coarse-grained textures. When lava erupts onto the Earth's surface and cools quickly, it forms extrusive igneous rocks with fine-grained textures.

Weathering and erosion break down rocks on the Earth's surface, producing sediments. These sediments are transported by wind, water, or ice and eventually deposited. Through the process of lithification, these sediments become compacted and cemented together, forming sedimentary rocks.

When existing rocks are subjected to high temperatures and pressures deep within the Earth's crust, they undergo metamorphism. This process causes changes in the mineral composition and texture of the rocks, resulting in the formation of metamorphic rocks.

If metamorphic rocks are subjected to extreme heat, they may undergo melting and become magma, restarting the cycle. This melting can occur due to the increase in temperature at depth or the introduction of heat from nearby magma bodies. The magma can then cool and solidify to form igneous rocks, completing the cycle.

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1) Phyllite: Phyllite exhibits a preferred orientation of mineral grains.

2) Slate: Slate shows a preferred orientation of mineral grains.

3) Schist: Schist displays a preferred orientation of mineral grains.

4) Gneiss: Gneiss exhibits a preferred orientation of mineral grains.

1)  Phyllite is a low-grade metamorphic rock that displays a preferred orientation of fine-grained minerals, such as mica and chlorite. This alignment of minerals creates a characteristic foliation or layering within the rock.

2) Slate is a fine-grained metamorphic rock that also exhibits a preferred orientation of mineral grains. This orientation gives rise to a property known as "slaty cleavage," which allows slate to be easily split into thin, flat sheets.

3)  Schist is a medium- to high-grade metamorphic rock that has a well-developed foliation resulting from the alignment of larger mineral grains. This alignment gives schist its characteristic rough texture and planar foliation known as schistosity.

4) Gneiss is a high-grade metamorphic rock that displays distinct bands or layers of different minerals. These bands result from the preferred orientation of mineral grains within the rock, creating a banded appearance known as gneissic foliation.

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The complete question is:

The TA hands out 4 metamorphic rocks that show a preferred orientation of the mineral grains. 1.) phyllite 2.) slate , 3.) schist 4 )Gneiss

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.

In 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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Three natural disasters that cause the most deaths in the U.S. since 1986 are Tornados, Storm surges, and Floods.

Any disaster with ties to natural risks is considered a natural disaster. A natural disaster can result in human casualties or property destruction, and it frequently leaves behind economic losses. The extent of the destruction depends on the population's fortitude and the infrastructure's condition.

All forms of severe weather, that have the potential to pose a serious threat to property, vital infrastructure, and homeland security, are considered natural disasters.

A natural disaster is an unplanned incident that hurts society. Natural catastrophes frequently cause damage to both the environment and the population.

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The country found at 30 N latitude and 90 W longitude is Mexico while

The state found at 40 N latitude and 110 W longitude is Utah.

Geography of Mexico

Mexico is located in the southern part of North America, and it has a total area of approximately 1.97 million square kilometers. United States , Belize and Guatemala are the countries it share borders with.

The geography of Mexico is very diverse with rugged mountains, high plateaus, coastal plains, and deserts.

The climate is also diverse ranging from tropical in the south to arid and temperate in the central and northern regions.

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Directed pressure is required for the formation of foliations. Foliations are planar structures in metamorphic rocks that are formed by the alignment of minerals under directed pressure.

Shale is the genetic category of rocks that is most susceptible to metamorphism. Shale is a fine-grained sedimentary rock that is composed of clay minerals.

Garnet is a red colored mineral that is an index of intermediate grade metamorphism. Garnet is a relatively high-temperature mineral that forms when shale is metamorphosed at temperatures of 400-600 degrees Celsius.

Gneiss is the foliated metamorphic rock that represents the highest grade of metamorphism. Gneiss is characterized by coarse-grained minerals that are arranged in alternating bands of light and dark colors. These bands are formed by the segregation of minerals during metamorphism.

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The worlds with atmospheres among the options provided are:

A. Jupiter

B. Titan

C. Triton

E. Neptune

H. Venus

Jupiter: Jupiter is a vapor giant and the best globe in our earth. It has a dense air calm primarily of hydrogen and helium, in addition to trace amounts of added vapor to a degree poison gas, liquid, and water mist.

Titan is the best moon of Saturn and is popular for bearing a thick air. It has a nitrogen-rich air related to Earth's, in addition to meaningful amounts of poison gas. Titan's air is of excellent interest to physicists on account of allure correspondences to early Earth's air and allure potential for accommodating organic particles and potential for all time

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According to the nebular hypothesis of planet formation the Earth and the Sun formed from the same cloud of dust and gas.

Hence, the correct answer is option b.

The nebular hypothesis is a theory that explains the formation of our solar system. According to this hypothesis, the solar system originated from a giant rotating cloud of gas and dust known as a nebula. The nebula began to collapse under its own gravity, causing it to flatten into a spinning disk. The central region of the disk, known as the protosun, grew hotter and denser, eventually igniting as the Sun.

Meanwhile, the material in the disk began to accrete and collide, forming planetesimals and protoplanets. These objects continued to grow through a process called accretion, eventually becoming the planets, moons, asteroids, and comets that populate our solar system.

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The given question is not properly written. Hence, the proper question is:

According to the nebular hypothesis of planet formation_______,

a. Earth is older than the Sun and was captured by the Sun's gravity

b. Earth and Sun formed from the same cloud of dust and gas.

c. A meteorite struck the Sun and ejected material that coalesced to form the Earth

d. Pluto should be a planet

The perception of witches as serving "positive" or "negative" social purposes is varied like healing, and fear respectively. We can draw analogies with modern US society across cultures, history, and so on.

Witches were often associated with practices that deviated from established societal norms and religious beliefs in the earlier days. In this sense, they were seen as a threat to social order and religion leading to negative perceptions about them.

Witches in those days were often accused of engaging in harmful magic, causing illness, misfortune, or even death. These negative associations are coming from fear, superstition, and the desire to control or eliminate practices considered outside the societal norm by the people.

In some cultural and historical contexts, witches were also revered as healers and midwives. They were believed to possess knowledge of herbal remedies, divination, and other practices that could benefit individuals or communities.

They also served as spiritual practitioners and did spiritual guidance. They do divinations, rituals etc. In these cases, witches were seen as positive contributors to society, providing services and guidance to people to help them.

Perceptions of witches as positive or negative vary across cultures. Some cultures revere witches as spiritual leaders or wise women, while others demonize them as harmful entities. This cultural variation reflects different belief systems and societal values, which also exist in modern US society, where different perspectives shape perceptions of various practices and beliefs of people.

The perception of witches has changed over time. In some historical periods, witches were regarded as threats and persecuted, while in others, they were respected as valuable community members. The reception of witches as serving "positive" or "negative" social purposes is complex and varies across cultures and historical periods.

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The perception of witches serving "positive" or "negative" social purposes varies across cultures and historical contexts.

Positive Social Purposes:

1. Healing and Herbalism: Throughout history, some witches have been associated with healing practices and knowledge of herbal remedies. They were often sought out for their abilities to provide natural remedies for ailments and promote well-being.

2. Community Support: Witches have sometimes been seen as providers of community support. They may offer advice, guidance, and spiritual assistance to individuals facing personal challenges or difficult life situations.

3. Knowledge and Wisdom: Witches have been depicted as possessors of esoteric knowledge and wisdom. In some societies, they were revered for their insights into nature, spirituality, and the mysteries of life.

Negative Manifestations:

1. Persecution and Witch Hunts: Witches have historically been subject to persecution and witch hunts, especially during periods like the European witch trials.

2. Dark Magic and Harm: The portrayal of witches engaging in malevolent activities, such as casting spells, cursing, or causing harm to others, has been prevalent in folklore and literature.

3. Social Outcasts and Marginalization: Witches have often been marginalized and stigmatized in societies due to their perceived association with the occult, non-conformity, or unconventional beliefs. This marginalization can lead to discrimination, ostracism, and exclusion from mainstream communities.

Drawing an analogy with aspects of modern US society, one could argue that the perception of witches shares some similarities with how certain marginalized groups or individuals are treated.

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The factors that regulate the amount of O2 available for organisms and roots in the soil are soil moisture content, soil structure and soil temperature.

Soil moisture talks about the amount of water present in the soil and this is affected by the level of precipitation. The more the soil moiture in the soil, the lower the available oxygen available for the organism.

Also, the soil structure which talks about soil arrangement affects oxygen availability because a soil with large more pore spaces will have more oxygen present in it.

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The sufficiency of caloric intake in Tanzania is approximately 200.7%, indicating that the total grain and tuber yield surpasses the daily caloric requirement of the population.

To calculate the answers, let's break down the given information and perform the necessary calculations:

Total grain yield: The average annual agricultural yield in Tanzania is 8,670 kg/ha. Considering a population of 50.3 million, we need to convert hectares to the total area required. Assuming one person requires 1 kg of grain (3,000 kcal), the total grain yield would be:

Total grain yield = Population × Grain yield per person

Total grain yield = 50.3 million × (1 kg/person) = 50.3 million kg

Total tuber yield: The average annual agricultural yield includes both grains and tubers, with a growth rate of 1.5% per year. We can calculate the total tuber yield similarly to the grain yield, considering one person requires 1 kg of tubers (1,000 kcal):

Total tuber yield = Population × Tuber yield per person

Total tuber yield = 50.3 million × (1 kg/person) = 50.3 million kg

Total caloric intake: To determine if the caloric intake meets the daily requirement, we need to convert the total grain and tuber yield into kilocalories (kcal) and compare it to the population's needs:

Total caloric intake = (Total grain yield × Grain kcal) + (Total tuber yield × Tuber kcal)

Total caloric intake = (50.3 million kg × 3,000 kcal/kg) + (50.3 million kg × 1,000 kcal/kg)

Total caloric intake = 151.5 billion kcal + 50.3 billion kcal

Total caloric intake = 201.8 billion kcal

Daily caloric requirement: The daily caloric requirement for the population can be calculated as follows:

Daily caloric requirement = Population × Daily caloric intake per person

Daily caloric requirement = 50.3 million × 2,000 kcal/person = 100.6 billion kcal

Sufficiency of caloric intake: To determine if the caloric intake meets the daily requirement, we compare the total caloric intake to the daily caloric requirement:

Sufficiency of caloric intake = (Total caloric intake / Daily caloric requirement) × 100

Sufficiency of caloric intake = (201.8 billion kcal / 100.6 billion kcal) × 100

Sufficiency of caloric intake ≈ 200.7%

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Astronomers use a variety of methods to locate exoplanets, which are planets that orbit stars outside our solar system.

Astronomers use a variety of methods to find exoplanets. The following are the methods used to search for exoplanets:

A. Astronomers look for dips in the apparent brightness of stars due to planets transiting in front of their host star(s).

B. Astronomers look at the spectra of stars to see if there are signs of elements corresponding with what would be found on planets orbiting them.

C. Astronomers look for light reflected by planets from their host star(s).

D. Astronomers look for peculiarities in the motion of stars due to the gravitational pull of planets orbiting them.

E. Astronomers look for variability in apparent brightness of planets orbiting planets as they pass through phases, similar to the phases of Venus and our moon.

The Kepler space telescope, which was launched in 2009, has been particularly successful in detecting exoplanets. Kepler is an example of a transit photometry instrument that uses the first method above (A) to detect exoplanets.

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If the rocks on either side of an earthquake-prone fault become stronger, the TRUE statement is: The fault can now hold a larger amount of stress before it slips in an earthquake. Therefore, option C is correct.

In the context of earthquakes, a fault is a zone of weakness where seismic activity occurs. The strength of the rocks on either side of the fault is crucial in determining the behavior of the fault during an earthquake.

If the rocks become stronger, it means they have a higher resistance to stress and can withstand a larger amount of stress before slipping and causing an earthquake.

This increased strength of the rocks can impact the overall seismic activity and the potential size or magnitude of earthquakes along the fault line.

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Most probably, your complete question is here:

Which of the following statements is TRUE if the rocks on either side of an earthquake-prone fault become stronger?

A. nothing changes.

B. The next time an earthquake happens, it will have a smaller moment magnitude.

C. The fault can now hold a smaller amount of stress before it slips in an earthquake.

D. The fault can now hold a larger amount of stress before it slips in an earthquake.

When crops are watered daily, the increased humidity increases evaporation, resulting in a greater contribution from latent heat flux and a lower Bowen ratio than when the crop is dry.

The Bowen ratio is a measure of the ratio between the sensible heat flux (heat transfer by conduction and convection) to the latent heat flux (heat transfer by evaporation) over the Earth's surface. A higher Bowen ratio indicates the dominance of the sensible heat flux, while a lower ratio indicates the dominance of latent heat flux.

The following table shows Bowen's ratios for different soil surfaces:

Water: Low Bowen Rate

Stone: High Bowen Rate

Tropical forest: Low Bowen Rate

Meadow: Intermediate Bowen Ratio

Crops: Intermediate Bowen Ratio

Desert: High Bowen Rate

Tundra: High Bowen Rate

If an area with crops is divided into two halves, with one half irrigated daily and the other half allowed to dry, the Bowen ratio of the crops watered daily is reduced compared to when they are dry. An increase in humidity due to daily watering will increase evaporation, resulting in a greater contribution of latent heat flux and a lower Bowen ratio. 

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