Using the theories of stars, we got that dense, dusty gas clouds are more likely to find within (or on the edges of) spiral arms of a spiral galaxy than in between these arms.
The spiral arms of the galaxies are the the main production centres of young stars. The more gas and the dust available, the greater the fraction of the galaxy that can be involved in the star formation. These high-production galaxies actually tend to be dominated by their spiral arms and have relatively small central bulges. Their arms contain actually more clusters of very luminous stars and the more luminous nebulae (HII regions).
Hence, the biomass which are more likely to find within (or on the edges of) spiral arms of a spiral galaxy than in between these arms is dense, dusty gas clouds.
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how dark is the ocean at night
Are you referring to above the surface of the ocean or below the surface of the ocean? But either way it is completely dark at night in the ocean, and without any source of light or any glow from the moonlight, it would be near pitch black above or below the surface of the ocean.
The surface of the ocean may reflect light radiating from the moon, and therefore illuminating the surface of the ocean providing visibility depending on the phase of the moon, brightest during the full moon.
But during the day, the glow of light from the sun may travel as far as 1000 meters deep into the ocean, although light still travels beyond 200 meters and up to 1000 meters but its intensity is greatly reduced making it nearly invisible to the eye.
Euphotic (sunlight zone) 0 - 200 meters deep is penetrable by light.
Dysphotic (twilight zone) 200 - 1000 meters is barely penetrable by light making it darker as the depth increases.
Bathypelagic (midnight zone) 1000 meters below is impenetrable by light causing this zone to be pitch black.
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The fact that sunlight barely reaches deeper than a few hundred meters in the water is one reason for emitting light. It is entirely dark below that. Light is an excellent means for animals to communicate since throughout the night, everything is dark, even the ocean surface, but for the faint glow from the moonlight.
Light, what is it?
The ocean's surface may reflect moonlight, brightening it and improving vision, depending on the moon's phase. The full moon is when this is the brightest.
During the day, light can travel up to 1000 meters and beyond 200 meters, but it is much less strong and is essentially imperceptible to the human eye. The sun's light can reach sea depths of up to 1000 meters.
Since light cannot reach the 1000 meter-deep bathypelagic (midnight zone), it is absolutely dark.
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Spanish conquistadors were able to
enslave Native Americans because
of what resource?
A. gunpowder
B. coffee
C. corn
Answer:
A
Explanation:
The mediterranean polyculture is grown in a region most like which agricultural region of the united states? question 14 options: the southeast new england california the southwest
Mediterranean polyculture is grown in a region most similar to California. Dairy farming takes up a considerable area to the north of the Mediterranean.
Mixed plantings are two or more useful plants that grow at the same time, usually in the same place. From an ecological point of view, they try to mimic nature's cycles.
As with natural systems, it offers benefits such as less pest damage, soil preservation, and increased yield per unit area compared to monoculture. In agriculture, polyculture is the practice of growing more than one crop in the same space at the same time. At the same time, multiculturalism seeks to emulate the diversity of natural ecosystems. Polyculture is the opposite of monoculture, in which only one plant or animal is grown together.Learn more about polyculture here: https://brainly.com/question/22140345
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What are 2 benefits of
British rule?
What were 2 deficits of
British Rule?
Answer:
Improvement of government in the native states. Security of life and property. Services of educated administrators, who have achieved these results. Materially: Loans for railways and irrigation. Development of a few valuable products, such as indigo, tea, coffee, silk, etc
Explanation:
In what country is the center of the Prime Meridian?
what is the important points about crowding.
Important points about crowding would include feeling of discomfort, feeling that privacy is being threatened and gives negative view of a space.
Crowding serves as an example of how the physical environment can impact behaviour. Psychologists make a distinction between physical indicators of physical space like density and crowding, a psychological concept in which the quantity of space available is less than desired.
What counts most is the closer, more direct sense of someone else's intimate presence, especially in living and working environments. A high-density social gathering is enjoyable, but a high-density living or working environment might be unpleasant.
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What are Earth's natural defenses against solar storms?
Even though there may be a small amount of particulate radiation that reaches the Earth's surface, the magnetosphere and Earth's atmosphere continue to shield our planet from cosmic rays and charged solar particles.
Plasma, mostly electrons, and protons, which are highly charged particles, make up the magnetosphere. Differing parts of the magnetosphere have different concentrations of these charged particles.
Most of the solar material that is being swept towards us at 1 million mph or more by our star is deflected by it. The unrelenting activity of these solar particles, which screen humans from the Sun's UV radiation, might deplete the Earth of its protective layers if the magnetosphere weren't present.
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Which adaptation was the most important in enabling the first terrestrial animals to eliminate their dependence on aquatic habitats?.
The amniotic egg was the most important in enabling the first terrestrial animals to eliminate their dependence on aquatic habitats.
The primary evolutionary strategy used by terrestrial animals to bring the "pond" inland and lessen their reliance on water for reproduction was the amniotic egg.
The definition of adaptation refers to how a species modifies its physical features and behavioural patterns to better fit its natural surroundings. On earth today, 8.7 million different species are thought to exist. They can be found in a broad variety of environmental settings, from the scorching sands of the Sahara to the freezing and lonely Arctic.
The earth's natural environment is a dynamic aspect of the globe. The ability to adapt ensures that the species with the greatest capacity for adaption will prevail.
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Summarize what occurs at Convergent boundaries between two continental plates. be Specific in using the terms that apply.
The natural occurences that occurs at the convergent boundaries includes:
earthquakesvolcanoesformation of mountainsother geological events.But, the natural occurences that occurs at the convergent boundaries between two continental plates is that new continental crust is created and oceanic crust is destroyed.
What is a convergent boundaries?The boundary is an area on Earth where two or more lithospheric plates collide, where one plate eventually slides beneath the other with a process known as subduction.
The subduction zone is where many earthquakes occur and collisions happen on scales of millions to tens of millions of years and can lead to volcanism, earthquakes, orogenesis, destruction of lithosphere, and deformation.
In conclusion, the convergent boundaries occurs between oceanic-oceanic lithosphere, oceanic-continental lithosphere, and continental-continental lithosphere.
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Jupiter has three moons for which there is evidence of a global, subsurface ocean of liquid water, with the strongest evidence favoring an ocean on _____
Jupiter has three moons for which there is evidence of a global, subsurface ocean of liquid water, with the strongest evidence favoring an ocean on Europa.
The Galilean satellites are a group of Jupiter's four sizable moons. Europa is the smallest and second-closest to Jupiter of these four. Its 1560 kilometre radius makes it significantly smaller than the Moon. This size of object is anticipated to dissipate its interior heat in a relatively short amount of time. For comparison, the majority of lunar volcanism ended more than 3 billion years ago, while the final eruptions took place about a billion years ago. Therefore, we can naively assume that Europa is geologically extinct.
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which of the following are true of the movement of sediment on a beach under normal (nonstormy) conditions?
Fine, dry sediment may be carried long distances by the wind are true of the movement of sediment on a beach under normal (non stormy) conditions.
What is sediment ?Common sedimentary rocks are sandstone, limestone, and shale. These rocks often begin as sediments that are carried by rivers and deposited in beach and oceans. Upon burial, the sediment loses moisture and is cemented into rock.Rocks larger than small particles of clay are called sediments and are moved by water. Fast-moving water can pick up, suspend, and displace larger particles than slow-moving water. High concentrations of suspended sediment can displace vegetation, invertebrates and insects in riverbeds. This can affect the fish's food sources, resulting in smaller and fewer fish. Sediment can bury and suffocate fish eggs. Sediment particles can contain toxic agricultural and industrial compounds.Nutrients carried by the sediment can activate blue-green algae that can release toxins and make swimmers sick. Sediment buildup in rivers can alter water flow and reduce water depth, making navigation and recreational use more difficult.To learn more about sediment from the given link:
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What Natural vegetation region is best for agriculture
The natural vegetation region that is best for agriculture is the Grassland vegetation region.
What vegetation regions are good for agriculture?There are five main vegetation regions which are forests, deserts, tundra, grassland, and the places covered with ice sheets. Of these five, only 2 are suitable for agriculture and they are the grassland vegetation region, and the forest vegetation region.
The grassland vegetation region is most often used for agriculture because it is found more abundantly than the forest vegetation. There is also the fact that it is easy to harvest and easy to plant on because it doesn't have as many trees as the forest vegetation region.
Using a grassland vegetation region is also more environmentally friendly because less trees are cut as would have been done in the forest region. Overall, the grassland vegetation region is best for agriculture and the environment.
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A rapid temperature increase about 55 mya created tropical conditions around the world. What did these conditions cause?.
A rapid temperature increases about 55 mya created tropical conditions around the world causes adaptive radiation of Euprimates.
Previously known as the "Initial Eocene" or "Late Paleocene thermal maximum" the Paleocene-Eocene thermal maximum (PETM), also known as "Eocene thermal maximum 1" (ETM1), was a period of time when the global average temperature rose by more than 5-8° C throughout the event.
It has been calculated that the related period of significant carbon emission into the atmosphere lasted between 20,000 and 50,000 years. it took the entire warm era almost 200,000 years to complete. the earth's temperature rose by 5-8 °C.
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A rapid temperature increases about 55 mya created tropical conditions around the world causes adaptive radiation of Euprimates.
Previously known as the "Initial Eocene" or "Late Paleocene thermal maximum" the Paleocene-Eocene thermal maximum (PETM), also known as "Eocene thermal maximum 1" (ETM1), was a period of time when the global average temperature rose by more than 5-8° C throughout the event.
It has been calculated that the related period of significant carbon emission into the atmosphere lasted between 20,000 and 50,000 years. it took the entire warm era almost 200,000 years to complete. the earth's temperature rose by 5-8 °C.
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The national park service has asked the public to stop doing what to sonoran desert toads?.
The national park carrier has provided a service where the general public to prevent doing/hold your tongues off the toads and now no longer to lick the Sonoran desolate tract toads.
National parks evoke reminiscences of summer time season avenue trips, trekking adventures and non violent communions with nature. But each so regularly, testimonies of traveler misbehavior shake that idyllic image: vandals leaving graffiti alongside a trail, parkgoers getting dangerously near bison, a character launching a golfing ball into the Grand Canyon. These are a number of the moves park officers are asking traffic to avoid.
“It could make you unwell in case you cope with the frog or get the poison on your mouth,” the park carrier stated in social media posts. Bad conduct on the country’s sixty three countrywide parks — now no longer to say loads of different anciental sites, memorials, monuments, rivers, beaches and different areas — regularly make headlines. These are a number of the moves park officers are asking traffic to avoid. “It could make you unwell in case you cope with the frog or get the poison on your mouth,” the park carrier stated in social media posts.
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what is meant by geothermal energy? list some examples of how and where it is tapped. why are all geothermal resources not used to generate electricity? what are some environmental issues associated with geothermal energy?
Answer:
Question 1: Magma heats nearby rocks and underground aquifers. Hot water can be released through geysers, hot springs, steam vents, underwater hydrothermal vents, and mud pots. These are all sources of geothermal energy. Their heat can be captured and used directly for heat, or their steam can be used to generate electricity.
Question 2: A geothermal resource requires fluid, heat and permeability in order to generate electricity: Fluid, Sufficient fluid must exist naturally or be pumped into the reservoir. Heat, The earth's temperature naturally increases with depth and varies based on geographic location.
Question 3: The environmental effects of geothermal development and power generation include the changes in land use associated with exploration and plant construction, noise and sight pollution, the discharge of water and gases, the production of foul odours, and soil subsidence.
Explanation:
Please give the brainliest.
based on the theory of plate tectonics, you would expect to find heat flow at the mid-ocean ridge and heat flow at subduction zones when compared to other parts of the crust group of answer choices decreased; increased increased; decreased increased; increased decreased; decreased
Based on the theory of plate tectonics, we would expect to find decreased heat flow at the mid-ocean ridge and increased heat flow at subduction zones when compared to other parts of the crust. The Option A is correct.
What are mid-ocean ridge?This means the seafloor mountain system formed by plate tectonics wich has a depth of about 2,600 meters and rises about 2,000 meters above the deepest portion of an ocean basin. It is where seafloor spreading takes place along a divergent plate boundary
What are subduction zones?These are where Earth's tectonic plates dive back into the mantle, at rates of a few to several centimeters per year.
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Match the process with its description of how it affects shorelines.
a. Waves
b. Rivers
c. Winds
d. Faulting/tectonic activities
e. Currents
1. They may move either shallow or deeper-level water, and they transport sediment
2. Mostly generated by wind, they erode rock and move and deposit sediment.along a coast.
3. They are an important contributor of sediment from the land side and may deposit sediment in the form of a delta.
4. They move fine material on a beach, and transported sediment may form dunes.
5. Over time, they may raise or lower parts of a coast relative to sea level, causing either emergence or submergence of the coast.
Waves - Mostly generated by wind, they erode rock and move and deposit sediment.
Rivers - They are an important contributor of sediment from the land side and may deposit sediment in the form of a delta.Winds - They move fine material on a beach, and transported sediment may form dunes.Faulting/tectonic activities - Over time, they may raise or lower parts of a coast relative to sea level, causing either emergence or submergence of the coast.Currents - They may move either shallow or deeper-level water, and they transport sediment along a coast.In fluid dynamics, wind waves, waves on water, or wind-generated waves on the water are surface waves that arise on the free surface of a body of water as a result of wind blowing on the surface of the water. The contact distance in the wind direction is called the haul.
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geologists can investigate the interior of earth by ______.
Answer:
To study Earth's interior, geologists also use an indirect method. But instead of knocking on walls, they use seismic waves. When earthquakes occur they produce seismic waves. Geologists record the seismic waves and study how they travel through Earth.
Explanation:
Geologists also employ an indirect approach to research the innards of the Earth. But they employ seismic waves rather than banging on walls. Seismic waves are created by earthquakes. Geologists observe and record seismic waves as they move through the Earth.
What is Geologists?an expert in the examination and study of geology. Geologists and geophysicists study the composition, structure, and other physical features of the earth. As a geologist or geophysicist, you might work on initiatives to identify and offer guidance on the extraction of minerals, petroleum, and ground water.
Geologists are researchers who focus on the composition, history, and dynamics of the Earth. Geologists come in a wide variety of specialties; two examples are environmental geologists, who study how people interact with the environment, and economic geologists, who look for and use the planet's natural resources.
This includes almost all earthly features, including volcanoes, earthquakes, rocks, mountains, and oceans. The discipline of historical geology focuses on the past of the planet.
Thus, it is an indirect approach.
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How is each subregion divided into smaller areas
These subregions are further divided into smaller geographic regions or areas: Low island ,Continental islands, High islands.
How numerous sub regions are there?These regions are beyond divided into 21 geographic subregions. Geographic zones countries and areas are also categorized geographically into six significant areas designated as Africa; Asia; Europe; Latin America and the Caribbean; Northern America, and Oceania.
How can the place be dissociated into regions?A region can be defined by natural or artificial features. Language, jurisdiction, or religion can define a region, as can woods, wildlife, or climate. Regions, large or small, are the primary units of terrain.
Why is Asia divided into subregions?Given its large size, Asia has been subdivided on the base of numerous factors including artistic, political, etc. Physiographically, there are five major regions of Asia. These are Central Asia, East Asia, South Asia, Southeast Asia, and Western Asia
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A football match between Senegal (18°W) and Japan (140°E) was played in Senegal on Saturday, the 22nd of September, 2015 at 6pm. Calculate the: (1) (ii) Time Day to listen to the commentary of the match by the Japanese.
Answer:
23rd of September, 2015 at 3am
Explanation:
Japan is 9 hours ahead of Senegal so, you add 9 hours onto Senegal's time and you get 3am the next day.
igneous rock composition however is dictated by the amount of silica present in the rock. high silica content will result in a __________________________ composition.
Igneous rock composition however is dictated by the amount of silica present in the rock. high silica content will result in a Felsic composition.
A silicate mineral, magma, or rock that is abundant in lighter elements including silicon, oxygen, aluminum, sodium, and potassium is referred to as felsic. In comparison to mafic magma/lava, felsic material has a greater viscosity.
The term "felsic" in geology refers to igneous rocks that are highly abundant in the components that go into making feldspar and quartz. Felsic rocks often have light colors and specific gravities under 3. Granite is the most typical felsic rock. Rocks classified as felsic have a silica concentration greater than 65 percent according to a frequently used categorization system. Rhyolite and granite are felsic rocks, having an average silica concentration of roughly 72%, according to compilations of several rock studies.
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the expansion of deeply buried rocks after they are exposed by erosion causes the formation of?
Using the concepts of rocks, we got that the expansion of deeply buried rocks after they are exposed by erosion causes the formation of Fractures.
Fractures along which the rock has slipped relative to the other side are called faults, whereas fractures that are the simple cracks where the rock has pulled apart by the small amount are joints. Any fracture or system of fractures along which the Earth moves is known as a fault. Faults allow the blocks to move relative to each other which actually results to an earthquake.
When deeply buried rocks are uncovered by the erosion, the removal of weight allows them to relax and expand. Produces fractures and it increases in porosity. This stress-relaxation process actually reduces the strength of rocks, opening up passageways/storage places for the water to attack and further weaken the rocks.
Hence, the expansion of deeply buried rocks after they are exposed by erosion causes the formation of Fractures which reduce the strength of the rock.
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What happened to American Indians as a result of the Spanish conquest of the Americas?
What happened to American Indians as a result of the Spanish conquest of the Americas?
A. Many migrated north to escape Spanish rule.
B. Those who converted to Christianity were given freedom.
C. They learned new ways to farm their land.
D. Many died from disease and mistreatment.
freshwater supplies (resources) can be increased by
Freshwater supplies (resources) can be increased by using the groundwater which is used to supply cities and grow food is being pumped from the aquifers in some areas faster than it is renewed by precipitation.
So, from another way in which freshwater supplies can be increased in a water stressed area is through the use of aqueducts, tunnels, and underground pipes in order to transfer stream runoff collected by dams and reservoirs in water-rich areas. So, in some areas it is renewed by precipitation.
The freshwater supplies can also be increased by large dam-and-reservoir systems and water transfer projects which thus have greatly expanded water supplies in some areas, but this has also a negative impact, as it have also disrupted ecosystems and displaced people.
Hence, such water transfers have benefits, while they also create environmental problems.
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What is the Carboniferous period also known as?
Answer:
The period is sometimes called the Age of Amphibians, during which amphibians became dominant land vertebrates and diversified into many forms including lizard-like, snake-like, and crocodile-like.
Explanation:
The "Carboniferous Period" is sometimes referred to as the "Age Of Amphibians".
Describe amphibians.Amphibians are a group of small animals that need water or a damp environment to survive.
These species include frogs, toads, salamanders, and newts. Each creature has incredibly thin skin that enables breathing and water absorption.
Furthermore, amphibians have special skin glands that produce useful proteins. Some allow the animal to take in or release gases like carbon dioxide, oxygen, and water. Others fight off fungal or bacterial infections. Each species also employs one or more for defense.
To warn potential predators, the most deadly frogs are also the most colorful. Curare, for instance, is found in the skin of colorful poison dart frogs. Another distinctive characteristic of most amphibians is their life cycle of egg-larva-adult.
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what fossil evidence suggests that australopithecines lived in polygynous social groups?
Scientists found small "families" of bones together is the evidence suggests that australopithecines lived in polygynous social groups.
Whilst you visit court, you will provide statistics (referred to as “proof”) to a decide who will decide your case. This proof can also consist of statistics you or a person else tells to the decide (“testimony”) in addition to items like email and textual content messages, files, snap shots, and items (“well-knownshows”).
Evidence is something this is used to guide a controversy. It gives examples of why some thing is actual. for instance, if a person come upon a cup of spilled milk, that character ought to search for proof as to how the milk became spilled.
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Find the measures for:
x =
P =
Q =
R =
The measures of the angles in the triangle are:
the measures for:
x = 35°
P = 22°
Q = 123°
R = 35°
How to calculate the angles?It is important to note that the sum of the angles in a triangle is 180° and that the triangle has three sides.
In this case, the sides are given as x, x - 13 and 2x + 53.
This will be illustrated as:
x + x - 13 + 2x + 53 = 180
4x + 40 = 180
Collect like terms
4x = 180 - 40
4x = 140
Divide
x = 140 / 4
x = 35
P = x - 13
P = 35 - 13
P = 22°
Q = 2x + 53
Q = 2(35) + 53
Q = 70 + 53
Q = 123°
R = x
R = 35°
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which one of the following is true? a) sierra nevada mountain is created by seismic fault. b) lewis overthrust in glacier national park in montana is created by folding. c) both a and b are correct. d) none of the above is correct.
The correct option is option (c), i.e, both (a) and (b) are correct. Sierra Nevada mountain is created by seismic fault and Lewis overthrust in glacier national park in Montana is created by folding.
The Sierra Nevada Fault, an active seismic fault in California's Sierra Nevada mountain massif, runs along its eastern boundary. It extends around 600 km (370 mi) from just north of the Garlock Fault to the Cascade Range, forming the eastern escarpment of the Sierra Nevada.
The Lewis Overthrust is a Rocky Mountain thrust fault structure that can be found in the bordering national parks of Waterton Lakes in Alberta, Canada, and Glacier in Montana, the United States. The structure was created when two tectonic plates collided about 170 million years ago, pushing a wedge of rock up to several miles thick 50 miles (80 kilometres) eastward, where it now lies on top of the softer rock from the Cretaceous period, which is 400–500 million years younger.
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The opposite of an urban area is a (fill in the blank) area.
which of the following statements correctly describe the role of ocean currents and continental positions on glaciations and global climate?
a. Some sediment is brought to glaciers by streams
b. Sediment that is carried and deposited by a glacier is a moraine
c. The sides and base of glaciers have the most abundant sediment
d. Sediment is largely unsorted and angular
By releasing less moisture into the sky, cold ocean currents can stop the formation of glaciers, and stronger ocean currents can bring colder water to the surface, which cools the land. The impact of continental drift on glaciers, ocean currents, and the overall climate is accurately described by this phrase.
Due to the fact that melting glaciers hold their water on land, runoff significantly increases the amount of water in the ocean, raising the sea level.
When the climate changes, glaciers, and ice caps react to the changes in the atmosphere and the ocean, which also clearly indicates that the climate is changing globally. Important information about the past temperature of the planet may also be found in glaciers, especially the vast inland ice caps.
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