Astronomers originally found the existence of spiral arms in galaxies difficult to account for because they couldn't explain how these long, curving structures could maintain their shape over such vast distances and over such long periods of time.
However, with the development of better telescopes and new techniques for studying galaxies, scientists have been able to observe the motions of stars and gas within these structures, which has helped them to better understand how they form and evolve over time. Today, we know that spiral arms are caused by a combination of gravitational forces and the rotation of the galaxy itself, and they play an important role in shaping the overall structure and dynamics of galaxies.
Learn more about galaxies here:
https://brainly.com/question/2905713
#SPJ11
The Unites States currently consumes roughly what percent of the world's oil?
a) 5%
b) 10%
c) 20%
d) 25%
e) 50%
The United States currently consumes roughly what percent of the world's oil is 50%. Therefore, the correct answer is (c) 20%.
The United States is the world's top user of oil as of 2021, although it does not consume half of the world's oil.
The percentage of oil consumption by any country can fluctuate depending on a variety of factors
The United States utilised the roughly 18.12 million barrels per day (mb/d) of petroleum and the other liquids in 2020, according to the Energy Information Administration (EIA).
According to the same source, this accounts for the around 18% of total global consumption of petroleum and other liquids. Therefore, the correct answer is (c) 20%.
For such more question on United States:
https://brainly.com/question/10497633
#SPJ11
A tectonic terrane can be defined as
Answer:
a crust fragment formed on a tectonic plate (or broken off from it) and accreted or "sutured" to crust lying on another plate.
Explanation:
order the steps in the formation of an angular unconformity
The formation of an angular unconformity involves several steps, which can be listed in the following order:
Deposition of horizontal sedimentary layers over an older, tilted rock layer.Uplift and exposure of the layered rocks due to tectonic activity or erosion.Erosion of the exposed rock layer, removing some of the overlying horizontal sedimentary layers and creating a flat, eroded surface.There are multiple steps involved in the creation of an angular unconformity, which might be enumerated in the following order:
Horizontal sedimentary layers are deposited over an older, inclined rock layer.Tectonic activity or erosion causes uplift and exposing of stratified rocks.Erosion of the exposed rock layer, resulting in the removal of some of the overlying horizontal sedimentary layers and the formation of a flat, eroded surface.Subsidence and fresh sedimentary layer deposition over the degraded surface result in a new set of horizontal layers that are parallel to each other but not to the older, tilted layer below.The contact between the older, inclined layer and the overlying horizontal layers results in an angular unconformity with evident angular discordance between the two sets of strata.For such more question on sedimentary:
https://brainly.com/question/1389409
#SPJ11
Which Region contains Dalton the "The Carpet Capital of the World"
Dalton the "The Carpet Capital of the World" is situated in the Valley region of Georgia.
The long, parallel ridges and valleys that make up the Slope and Valley place gave it that name. The region is well known for producing carpet and other products related to textiles. It is located in northwest Georgia and shares its border with Tennessee.
The topography and geology of the area have also had an impact on the development of the mining and manufacturing sectors. Georgia Valley and Ridge is located between the Appalachian Plateau and the Blue Ridge Mountains, north of the Piedmont.
Learn more about Georgia Valley at:
brainly.com/question/13140742
#SPJ4
suppose a stream flows from its headwaters, through a reservoir to its mouth in the gulf of mexico. where is ultimate base level?
The ultimate base level in this scenario is the Gulf of Mexico. It represents the lowest point to which a stream can erode its channel.
The ultimate base level is the point where a river or stream enters the ocean or sea. In the given scenario, the stream flows from its headwaters, through a reservoir, and finally to its mouth in the Gulf of Mexico. Therefore, the ultimate base level for this stream is the Gulf of Mexico. The stream's erosion and sediment transport processes are influenced by the gradient of the stream and the ultimate base level, with the ultimate base level determining the maximum depth to which the stream can erode. Over time, streams can erode their channels and modify the landscape, responding to changes in the ultimate base level or to variations in their flow volume and sediment load.
Learn more about sediment :
https://brainly.com/question/31539857
#SPJ11
A rock's type (igneous, metamorphic, or sedimentary) tells us a) its ageb) its chemical compositionc) how it was made
The type of rock provides information about how it was made, rather than its age or chemical composition.
Answer: c) how it was made
Igneous rocks are formed from the solidification of molten material (magma or lava) from within the Earth. They can have different chemical compositions depending on the type of magma or lava that formed them.
Metamorphic rocks are formed from the alteration of existing rocks through heat, pressure, or chemical processes. They can have different mineral compositions and textures depending on the specific conditions of metamorphism.
Sedimentary rocks are formed from the accumulation and cementation of sediments, which can include mineral and organic particles, as well as other rock fragments. They can provide clues about the environmental conditions and processes that occurred during their formation.
Learn more about “ type of rock “ visit here;
https://brainly.com/question/31142787
#SPJ4
Complete Question
A rock's type (igneous, metamorphic, or sedimentary) tells us:
a) its age
b) its chemical composition
c) how it was made
The Himalayas act as natural border between which two areas of the Asian continent
Help me pls
Answer:
east and south
Explanation:
searched it up
china, with its large population, has the highest per capita energy consumption in the world. T/F
about what fraction of brazils land is covered in rainforest
Which cloud type forms in an unstable environment?
nimbostratus
cirrus
stratus
cumulonimbus
altostratus
Cumulonimbus clouds are associated with thunderstorms and are often formed in an unstable atmosphere. The correct answer is: cumulonimbus.
An unstable environment is characterized by warm, moist air near the surface that is rising rapidly, leading to the rapid vertical development of clouds. Cumulonimbus clouds are characterized by their tall, vertical structure and can extend from low to high altitudes. They often have a flat anvil-shaped top and are associated with heavy rainfall, thunder, lightning, and sometimes hail.
Nimbostratus, stratus, and altostratus clouds, on the other hand, are generally associated with more stable atmospheric conditions.
Learn more about “thunderstorms “ visit here;
https://brainly.com/question/31459164
#SPJ4
do you believe that human activity can substantially affect earth's atmosphere
The burning of fossil fuels, deforestation, industrial processes, and other human activities release large amounts of greenhouse gases (such as carbon dioxide, methane, and nitrous oxide) into the atmosphere. So yes I believe that human activity can affect the atmosphere.
Furthermore, human activity can cause other changes in the atmosphere, such as ozone layer depletion due to the release of certain chemicals (such as chlorofluorocarbons) into the atmosphere, and increased concentrations of air pollutants, both of which can be harmful to human health and the environment.
Overall, there is solid scientific evidence to support the premise that human activity has a significant impact on the Earth's atmosphere, and it is critical to take actions to limit our environmental impact and mitigate the effects of climate change.
For such more question on atmosphere:
https://brainly.com/question/24925283
#SPJ11
The flow of energy shown in Figures 3 and 4 is the source of the natural atmospheric greenhouse effect. Visible light penetrates the atmosphere and is absorbed by the surface. The heated surface gives off infrared light that is then absorbed by the atmosphere. The heated atmosphere gives off infrared light out to space and also back down to Earth's surface, making the surface temperature warmer than it would be without a greenhouse effect. The amount of energy entering and leaving the Earth system can be balanced, but Earth's surface temperature is warmer because the surface is heated both by visible light from the Sun and infrared light sent back from the atmosphere.
17) Consider the following debate between two students regarding the greenhouse effect
Student 1: So the greenhouse effect is caused by infrared light being trapped in Earth's atmosphere. Visible light from the Sun heats the ground, but the Infrared light given off by the ground gets permanently trapped in the atmosphere and can never escape
Student 2: think that's close. But based on Figure 3, all of the arrows balance and just as much energy leaves Earth as comes in. I think the greenhouse effect makes the surface hotter than it would be without greenhouse gases because the ground gets visible light from the Sun AND infrared light given off by the atmosphere that is sent back to the surface.
Do you agree or disagree with either or both of the students? Explain your reasoning.
I agree with Student 2. The greenhouse effect does not permanently trap infrared light in Earth's atmosphere.
The quantity of energy entering and leaving the Earth system can be balanced, which means that the same amount of energy enters and departs the system.
The greenhouse effect, on the other hand, causes the surface temperature to be warmer than it would be without greenhouse gases, since greenhouse gases in the atmosphere absorb and re-radiate infrared radiation back to the surface, in addition to visible light from the Sun, which heats the surface.
This re-radiated infrared radiation warms the surface, which would be cooler without it.
As a result, the greenhouse effect is not about permanently trapping energy in the atmosphere, but rather about changing the balance of incoming and departing energy to raise the temperature of the earth's surface.
For such more question on atmosphere:
https://brainly.com/question/24925283
#SPJ11
not hard but still help
Answer:
D - Condensation
H - Groundwater
G - Infiltration
B - Evaporation
A - Solar Radiation
C - Transpiration
E - Precipitation
F - Runoff
Explanation:
Of the 5 known mass extinctions, which is thought to have caused the largest loss of of life on earth?.
Out of 5 known mass extinctions, the Permian-Triassic extinction event, is considered to be the largest mass extinction ever.
Mass Extinctions:A mass extinction is an event in which a significant proportion of the Earth's biodiversity is lost in a relatively short period of time. Mass extinctions are usually defined as events in which atleast 75% of species on Earth become extinct.
The five known mass extinctions are:
Ordovician-Silurian extinction event - ~443 million years agoLate Devonian extinction event - ~359 million years agoPermian-Triassic extinction event - ~252 million years agoTriassic-Jurassic extinction event - ~201 million years agoCretaceous-Paleogene extinction event - ~66 million years agoLearn more about Mass Extinction here:
https://brainly.com/question/29774925
#SPJ4
The term Paleozoic describes the era of ancient life forms.A. True
B. False
The given statement, "The term Paleozoic describes the era of ancient life forms" is true as the narrative of the oldest creatures in the Paleozoic is one of marine existence.
Simple fungus and similar species are probably present in watery habitats, although there is no proof of this in the fossil record. Early Paleozoic Era terrestrial environments lacked even the most basic living forms.
The Paleozoic Era, also spelled Palaeozoic, is a significant period of geologic time that started 541 million years ago with the Cambrian explosion, which led to an extraordinary diversification of marine life, and ended about 252 million years ago with the end-Permian extinction, the biggest mass extinction in Earth history. From oldest to youngest, the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian eras make up the major divisions of the Paleozoic Era.
Learn more about Paleozoic Era here:
https://brainly.com/question/1972972
#SPJ4
True.The term Paleozoic describes the era of ancient life forms
The term Paleozoic refers to an era in Earth's history that lasted from about 541 to 252 million years ago. It is often called the era of ancient life because it was during this time that many of the major groups of animals and plants that we know today first appeared. The Paleozoic era is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.The Paleozoic era is a geological era that lasted from approximately 541 million years ago to 252 million years ago. It is sometimes referred to as the "Age of Invertebrates" due to the proliferation of marine invertebrates during this time, including trilobites, brachiopods, and crinoids.
The Paleozoic era is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. During this time, there were major geological and biological events, including the diversification and expansion of life on land, the formation of the supercontinent Pangaea, and several mass extinction events, including the end-Permian extinction, which wiped out more than 90% of marine species.
Learn more about Paleozoic here:
https://brainly.com/question/29244390
#SPJ11
What are common uses for the material quartz
Quartz is used for various purposes on earth. These are discussed below
What are common uses for the material quartzQuartz is an extremely useful mineral that has multiple uses; some of which include:
Construction: Quartz is used in multiple items of the construction industry, like cement, ceramic, and glass. It often serves as a filler material in construction products and likewise is a key part of the manufacture of glass and ceramics.
Electronics: Quartz crystals are used in different electronic devices, such as radios, watches, and televisions. These are invaluable oscillators and filters in electrical circuits due to the crystal's precise vibration frequency.
Jewelry: Quartz is highly popular when it comes to jewelry-making. It is supplied in various shades, consisting of rose, clear, purple, and smoky, and is frequently chosen instead of more expensive stones.
Energy: Quartz is essential for producing solar panels and can be utilized during the generation of silicon cells, which transfer sunlight into electricity.
Read more on quartz herehttps://brainly.com/question/999986
#spj1
in what part of a subduction margin might you find rocks deposited on the abyssal plain, far from land?
In a subduction margin, you might find rocks deposited on the abyssal plain, far from land, at the outer edges of the margin, where oceanic sediments accumulate before being subducted.
In a subduction margin, rocks may be deposited on the abyssal plain far from land due to the process of subduction. When an oceanic plate is forced beneath a continental plate, it sinks into the mantle and melts, creating magma that rises to the surface and forms volcanic arcs on the continental margin. As the volcanic material erodes, it is carried out to the abyssal plain by underwater currents and deposited there. Therefore, rocks deposited on the abyssal plain, far from land, can be found in the vicinity of a subduction zone. In a subduction margin, you might find rocks deposited on the abyssal plain, far from land, at the outer edges of the margin, where oceanic sediments accumulate before being subducted. These sediments are typically deposited by underwater currents and other marine processes.
Learn more about sediments :
https://brainly.com/question/31539857
#SPJ11
Hurricanes begin over oceans. Which location below most likely produced the most violent
storms? Circle your answer choice in the map and explain your answer below.
In 2007 in the United States there were approximately 480 cars for every 1,000 people. The total number of cars in the United States in 2007 was closest to
A
150,000
B
30,000,000
C
150,000,000
D
300,000,000
E
3,000,000,000
In 2007 in the United States there were approximately 480 cars for every 1,000 people. The total number of cars in the United States in 2007 was closest to 150,000,000. Option C is the correct answer.
301.2 million people called the United States home in 2007. There were 48% of persons who owned cars. Multiplying 301.2 million by 48% results in 301,200,000 multiply 48/100, which equals 144,576,000. it equates to 150,000,000. Option C is the correct answer.
Huge power plants and sputtering smokestacks, two of the most typical representations of climate change, would benefit from a minor modification. For the first time in more than 40 years, transportation—including automobiles, trucks, aircraft, trains, and ships—instead of power production is the United States biggest source of greenhouse gas pollution. Our well-being is impacted by pollution from cars, which also contain climate change-causing gases called greenhouse gases. The most prevalent greenhouse gas created by humans, carbon dioxide, is also released by cars. Option C is the correct answer.
Learn more about United States here:
https://brainly.com/question/28806805
#SPJ4
Question 25
Compactibility of soil in landfills depends primarily on:
a. the point at which refuse is discharged on the fill
b. the type of refuse to be compacted
c. the moisture content of the soil
d. the gradient of the particle size of the soil
The compatibility of soil in landfills primarily depends on the moisture content of the soil. Therefore the correct option is option C.
The gradient of the particle size distribution influences the soil's capacity to compress, with soils having a more uniform particle size distribution being more easily compacted than those with a wide range of particle sizes.
Other elements, such as soil moisture content and the type of garbage being compacted, can also have an impact on compatibility.
However, particle size distribution is widely regarded as the most critical component in determining soil compactibility in landfills. Therefore the correct option is option C.
For such more question on landfills:
https://brainly.com/question/30358534
#SPJ11
(T/F) term "deviant" refers to a moral, not a social judgement
Which factor is most significant in the formation of clouds in the atmosphere?
-moisture in the atmosphere
-ascent of air
-dry adiabatic rate
-descent of air
-lateral movement of air
The ascent of air is the most significant factor in the formation of clouds in the atmosphere, as it cools and condenses moisture into visible droplets.
The ascent of air is the main contributor to cloud formation in the atmosphere. When the temperature hits the dew point, moisture in the atmosphere condenses into observable droplets, producing clouds. As air rises, it cools owing to expansion. Although important for cloud formation, atmospheric moisture is not the main component.
Less significantly, the dry adiabatic rate, air descent, and lateral air movement may all have an impact on cloud formation. In general, air ascent, followed by cooling and moisture condensation, is essential for the development of clouds.
Learn more about the atmosphere:
https://brainly.com/question/28124272
#SPJ4
if the moon is at its closest distance to earth, is its angular size sufficiently large to block the sun's surface completely from view to someone standing on earth?
No, the moon's angular size is not sufficiently large to completely block the sun's surface from view to someone standing on Earth, even when it is at its closest distance to Earth.
The reason for this is that the moon's angular size is only about 1/2 degree, while the sun's angular size is about 0.5 degrees. This means that the moon is not large enough to cover the entire face of the sun, and there will always be a ring of sunlight around the edge of the moon during a solar eclipse.
However, during a total solar eclipse, the moon does block the sun's surface completely from view, but this is only visible from a specific path on Earth, which is typically only a few dozen to a few hundred miles wide. Outside of this path, observers will see a partial eclipse, where only a portion of the sun is blocked by the moon.
Learn more about distance here:
https://brainly.com/question/26711747
#SPJ11
True or False: Freezing rain falls as a liquid and freezes once its on the ground.
Freezing rain, also known as sleet or glaze, falls as liquid raindrops from the clouds but freezes on contact with objects at or near the surface that are at or below freezing temperatures. The correct statement is False.
This is different from regular rain, which falls as liquid water and does not freeze upon contact with the ground or other objects.
Freezing rain occurs when a layer of warm air lies above the surface, causing raindrops to form in the warmer air. These raindrops then fall through a layer of sub-freezing air near the ground, which causes them to freeze upon contact with cold surfaces, such as roads, trees, power lines, and other objects. This can result in the formation of a glaze of ice on surfaces, which can be hazardous and cause slippery conditions.
Learn more about “Freezing rain, “ visit here;
https://brainly.com/question/17889881
#SPJ4
The atmosphere is absolutely unstable when...
-The ELR is less than the DALR and the MALR
-The ELR is greater than the DALR and the MALR
-The ELR is between the DALR and the MALR
Atmospheric stability refers to the tendency of air parcels to either rise or sink in the atmosphere.
The ELR is greater than the DALR and the MALR. The correct answer is b)
The Dry Adiabatic Lapse Rate (DALR) and the Moist Adiabatic Lapse Rate (MALR) are rates at which the temperature changes with altitude for dry and moist air parcels, respectively.
If the Environmental Lapse Rate (ELR), which is the actual rate at which the temperature changes with altitude in the atmosphere, is greater than both the DALR and the MALR, then the atmosphere is considered to be absolutely unstable. This means that air parcels will continue to rise and accelerate without any external lifting mechanism, leading to vertical instability and potential convective activity, such as thunderstorms or severe weather.
Learn more about “ Atmospheric stability “ visit here;
https://brainly.com/question/29456089
#SPJ4
what are the two greenhouse gases most responsible for absorbing infrared light in earth's atmosphere
The two greenhouse gases most responsible for absorbing infrared (IR) light in Earth's atmosphere are carbon dioxide (CO2) and water vapor (H2O).
Both of these gases have molecules with bonds that may vibrate at infrared wavelengths, allowing them to absorb and re-emit infrared radiation released by the Earth's surface.
This mechanism captures part of the heat that would otherwise be emitted back into space, causing the temperature of the Earth's atmosphere to rise.
While other greenhouse gases, such as methane and nitrous oxide, exist, CO2 and H2O are the most prevalent and have the largest impact on global warming.
For such more question on atmosphere:
https://brainly.com/question/24925283
#SPJ11
A convergence of winds near the surface is associated with cloud production because it:
-increases the wind speed.
-forces the air to rise.
-increases the dew point.
-creates a vortex or spiral pattern.
-increases the lapse rate.
A convergence of winds near the surface is associated with cloud production because it forces the air to rise. Therefore the correct option is option B.
When winds converge, air is forced to pile up, causing it to rise. As the air rises, it cools and its moisture content might achieve saturation, resulting in cloud formation.
When winds diverge, air is forced to flow away from a location, causing sinking motion and drying out of the air, which suppresses cloud formation.
In conclusion, the convergence of winds at the surface is associated with cloud formation because it causes the air to rise, which can result in the formation of clouds. Therefore the correct option is option B.
For such more question on convergence:
https://brainly.com/question/12646299
#SPJ11
what gas molecules are primarily responsible fore the absorption of each of the following types of light in our atmosphere
The primary gas molecules responsible for the absorption of various types of light in our atmosphere are as follows: Ultraviolet (UV) radiation, Visible light, Infrared (IR) radiation and Radio waves.
The following are the principal gas molecules responsible for the absorption of various forms of light in our atmosphere:
UV radiation: Ozone molecules (O3), which are mostly located in the stratosphere, are the primary absorbers of UV light in the atmosphere.
Visible light interacts weakly with gas molecules in the atmosphere and is not greatly absorbed, but some of it can be scattered by air molecules, dust, and other particles.
Radio waves can flow through the atmosphere largely unaltered, but they can be absorbed by specific gases, such as water vapour, which can degrade radio transmission quality.
For such more question on Ultraviolet:
https://brainly.com/question/14504556
#SPJ11
: 130) The era known as the "age of mammals" is the ________. A) Precambrian B) Paleozoic C) Mesozoic D) Cenozoic
Answer: D The Cenozoic
Explanation:
The Cenozoic Era, from 65 million years ago to today, is the age of mammals and flowering plants and is marked by global cooling. The extinction of the dinosaurs allowed mammals to diversify and grow in size during the Cenozoic.
if this help you please give me a crown
Which best describes mount killmanjaro
Answer:
killManjaro is the worlds second largest mountain and is has a Colder temperature as you head to the top.it is a beautiful mountain