Most of the mass of the Milky Way seems to exist in the form of dark matter out in the halo.
Where are most of the Milky Way's mass?Infrared observations revealed that the stars at the galaxy's core orbit a dark object estimated to be 4 million solar masses in size, further supporting the existence of a black hole, according to Broderick. Dark matter, an unidentified and invisible form of matter that interacts gravitationally with ordinary matter, is thought to account for a large portion of the Milky Way's mass.
As it turns out, only 10% of the galaxy's total mass can be attributed to objects that we can directly measure, such as stars, dust, gas, planets, etc. About 90% of the galaxy's mass appears to be in the form of dark matter.
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1. Describe two ways that individuals can direct business to better environmental practices. 2. Summarize the work of Howard Hu from our Annenberg unit. 3. Identify three examples of external environmental costs. 4. Describe how the earth can "self adjust" its temperature despite solar fluctuations. 5. What is the scientific method and what processes does it involve?
Recycle What You Can and Use environmentally friendly goods are two ways that people can encourage businesses to adopt good environmental policies.
How does environment collaborate?1. the whole of the surrounding, events, or effects; milieu. 2. The environment that an animal is in at any particular time, such as the air, water, mineral, creatures, and any other external factors.
Briefing:
Several variables, particularly your current environmental consciousness, will affect the options that are open to you.
The type of work you do or whether you own the space or rent it will both have a massive effect on some things.
The price of discarding of the item after its service life is one of the three instances of external environmental consequences. environmental damage brought on by production-related pollutants, toxins, and waste
The scientific process is a condensed version of the process that researchers use to discover new facts.
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changes in sea level alternately flood and expose the edges of continents. what is the primary control on sea-level changes
The primary control in sea level changes in changes in ice sheet volume. The sea levels are rising on a yearly basis due to the warming of the Earth's surface majorly since the past 2 centuries. More specifically, it has been at an all time high since the beginning of the Industrial Revolution.
Gases like carbon dioxide, nitrogen dioxide and various other greenhouse gases have raised temperatures and unfortunately more so in the poles and therefore the melting of the glaciers has led to an increase in the rise of water levels.
The best estimate of the global glacier ice volume as calculated by scientists is 170 x 103 ± 21 x 103 km3. This is the volume outside Greenland and Antarctica.
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the dead sea, which lies between jordan and israel, is one of the saltiest lakes on earth. suppose you are a geologist exploring the area. what geological factors would you expect to see that might explain this salinity?i. high concentrations of uranium in or around the dead sea
As a geologist I will try to see : Lack of outlets for water to escape and relatively impermeable soil at the bottom of the lake
The Red Sea is a seawater inlet of the Indian Ocean, lying between Africa and Asia. It has a southern connection to the ocean via the Bab el Mandeb strait and the Gulf of Aden. The Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez lie to its north.
It is one-of-a-kind enchanting Diving spots. It is the major spot for scuba diving and snorkeling which many tourists prefer to enjoy during their Egypt tours. It has more than 1200 fish species that including 44 sharks, which makes it the best place to get into marine life
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How many different colors are used to mark curbs?
Five colors; green, yellow, red, white and blue are used to color-mark curbs.
What are curbs?The edge where a raised sidewalk, road median, or central reservation meets a street or other roadway is known as a curb or kerb.
Barrier curbs also known as straight curbs, resemble the stone slabs used originally for curbs. They also provide abrupt barriers that prevent automobiles from leaving pavement. Vehicles can encroach on roll curbs or mountable curbs without causing tire damage because of their sloping faces.
The curb paint color denotes:
White (or no color): Parking allowed, unless restricted or limited by signs.Blue designates a disabled-only parking space.Green: A brief period of parking is permitted.Yellow: Only halt to load or unload passengers.Parking is prohibited when the light is red.To know more about curbs, visit:
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what type of life forms today are thought to most closely resemble earliest forms of life on the earth?
Answer: tubeworms or extremophiles
Explanation:
The "zebra stripes" on the ocean's floor prove that?
Answer:
The "Zebra Stripes" on the bottom of the ocean are sediment bands. The differant amount of sediment allows for scientists to prove the therie of techtonic movment.
what strategy would increase the threat of climate change? group of answer choices shift from fossil fuels to a mix of carbon-free energy resources improve energy efficiency stop cutting down tropical forests capture and store as much carbon dioxide as possible continue with current practices
Responding to climate change involves two possible approaches: reducing and stabilizing the levels of greenhouse gases (“mitigation”) and adapting to the climate change already in the pipeline (“adaptation”).
One of the most challenging concerns we face today is climate change. It has numerous facets, including science, economics, society, politics, and moral and ethical issues. It is a worldwide issue that will persist for many millennia. The globe (and notably the ocean) takes a while to adapt to warming because carbon dioxide, the heat-trapping greenhouse gas that is the main cause of modern global warming, persists in the atmosphere for many thousands of years. Therefore, even if we completely ceased generating greenhouse gases today, future generations would still be impacted by global warming and climate change. Humanity has thereby "committed" itself to some degree of climatic change.
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What would happen if plastic got into the ocean?
Answer: the plastic would very slowly decompose this will inevitably lead to pollution in such places.
Explanation: brainliest please
Answer: Once the plastic is in the ocean, it decomposes very slowly, breaking into tiny pieces known as microplastics, which can enter the marine food chain and become incredibly damaging to sea life. The main source of ocean plastic pollution is land-based—80% of plastic in the ocean originates on land.
Explanation:
What is the measure of Angle4?
mAngle4 = 40°
mAngle4 = 48°
mAngle4 = 132°
mAngle4 = 140°
The measure of Angle 4 in the given problem is; m∠4 = 40°.
Define angle.An angle is a figure in plane geometry that is created by two rays or lines that have a shared endpoint. The shared terminus of two rays is known as the vertex, and the two rays are referred to as sides of an angle.
Angles 6 and 7 are vertical angles that are opposite to each other. As vertical angles are congruent:
11x + 8 = 12x - 4
11x - 12x = -4 - 8
-x = -12
Therefore, x = 12
Now,
m angle 6 = (11 * 12 + 8)° =140°
m angle 7= (12 * 12 - 4)° = 140°
Angles 6 and 8 are supplementary angles that add up to 180°
Therefore,
m angle 8= 180° - 140° = 40°
Angles 8 and 4 are corresponding angles, As corresponding angles are congruent:
m angle 4= 40°
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The axis on which Earth now rotates is tilted at an angle. If the axis was to be changed so that it was perfectly upright, which change would be expected on Earth? Current angle of tilt Change to upright for Earth's axis axis for Earth For every season, the length of the day would be shorter. There would no longer be periods of light and darkness. There would not be the same pattern of seasonal changes in weather It would always be winter in the Southern Hemisphere.
The axis on which Earth now rotates is tilted at a 23.5 degree angle. If the axis was to be changed so that it was perfectly upright like in the model, which change would be expected on Earth? There would no longer be periods of light and darkness. It would always be winter in the Southern Hemisphere.
the influence of the cbd is least important in which of the traditional models of city structure?
Answer: harries and Ullman's multiple nuclei model all the other models revolved around a central business district whereas the multiple nuclei module describes multiple centers other than that.
Explanation:
___________ are where molten magma rises to just underneath the surface of Earth, creating a bulge or volcanic activity
Rock cycles are where molten magma rises to just underneath the surface of Earth, creating a bulge or volcanic activity.
What is Rock Cycle?A fundamental idea in geology, the rock cycle illustrates how the three primary types of rocks—sedimentary, metamorphic, and igneous—change over the course of geologic time. When a rock is pushed out of its equilibrium circumstances, it changes.
The processes that produce and alter the different types of rocks found in the Earth's crust are collectively known as the rock cycle.
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Three of the following are true for minerals. Which one of the following is not true for minerals? They have a specific, predictable chemical composition. They have an orderly internal crystalline structure. They can be identified by characteristic physical properties. They can be a liquid, solid, or gas. Question 5 ( 1 point) The is weaker and less rigid than the overlying lithosphere.
According to the question, this isn't true for minerals, which can exist as a liquid, solid, or gas.
Explain what minerals are?
A mineral is an aspect or pesticide compound that is usually crystalline and was formed by geological processes. Quartz, felsic minerals, calcite, sulfur, and clay minerals such as metakaolin and smectite are examples.
What are the seven major minerals?
Calcium, chloride, magnesium, potassium, potassium, sodium, and sulfur are the major minerals that are used as well as stored in significant quantities in the body. Metals are just as critical to our well-being as major minerals, and yet we don't require large amounts of them.
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what characteristics does a terrestrial planet's interior need for it to be a geologically active world
A Terrestrial planet's interior need for it to be a geologically active world because a planet must be large enough to have sufficient radioactive material and it must be large enough to provide some insulation to retain from that heat
The tectonic plates activity on a planet is controlled by the amount of heat that is stored in the interior parts of planets after formation. if there is larger the amount of heat, the more energy stored is transfered to the surface in the form of geological activity.
The Earth and Venus are geologically active worlds with related to thick atmospheres. The Atmosphere are formed and maintained by volcanic outgassing. Terrestrial planets have characteristics like heavy-metal core, at least one moon, and valleys, volcanoes, and craters.
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The ratio of the sides of two similar figures is 2:5 the perimeter of the smaller figure is 14cm what is the perimeter of the larger figure
The perimeter ratio of two figures is 2:5 then the perimeter of the larger figure will be 35cm.
What is ratio?In data analysis the relation between two variables of similar nature in a similar context measured for showing a technical connection in them is where a numerator is above and denominator is below that number called ratio or rational number. (Ratio = [tex]N /D[/tex])
Here the ratio of two perimeters of two figures is given i.e. 2 : 5 this mathematical expression can be made as follows:
∵ [tex]2x + 5x = 7x[/tex]
If the value of perimeter of small figure = 14 Cm which is equals to [tex]2x[/tex] then the value of [tex]x[/tex] will be 7.
∵ [tex]5x[/tex] = Large figure perimeter
∴ [tex]x = 5[/tex] × 7
= 35.
Hence the perimeter of the large figure is 35cm.
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What part of the Indian Ocean is
between the east coast of India.
and Myanmar (formerly Burma)?
Answer:
The Bay of Bengal
Explanation:
It is the northeastern part of the Indian Ocean, bounded on the west and northwest by India, on the north by Bangladesh, and on the east by Myanmar and the Andaman and Nicobar Islands of India.
tropical rainforests have high species richness, but low density. in deciduous forests the pattern is the opposite. which of the statements is not a plausible explanation for this pattern?
Because there are fewer trees per hectare in temperate zones than in tropical rainforests, there are fewer species there.Similar to temperate deciduous forests, not every location in the planet undergoes seasonal change.
While some are perpetually covered in ice, others enjoy warm sunshine all year long. We who live in temperate climates experience seasonal changes every several months in rainforests . In July, you might be swooping across a lake on water skis, and six months later, you might be gliding across it on ice skates. When you have four seasons to experience each year as a child, you start to observe and value the seasonal ebb and flow of life all around you. Animals that don't migrate remain tucked up in warm dens throughout the winter, waiting for spring. When the snow melts and the trees' leaves blossom, life returns and gets ready for a new year. Spring is a wonderful rebirth.
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Change in elevation is called _____.
Answer: Change in elevation is called RELIEF
Explanation:
What is the most striking change in the seasonal temperature pattern as one moves from dublin ireland to samara russia
The coldest months of the year are January and February with average temperatures of 2ºC to 8ºC .Winters in Dublin are not usually very cold. The month with the most snow in Samara is January, with an average snowfall of 7.1 inches.
The country is located on the northeastern portion of the Eurasian landmass. It is bordered to the north by the Arctic Ocean, to the east by the Pacific Ocean, and to the south, by the Black and Caspian Seas.Ireland is an island nation on the westernmost edge of Europe. It is the continent's second largest island (after Great Britain). The Republic of Ireland occupies 80 percent of this landmass, while a large chunk of land in the north is part of the United Kingdom.
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the most important distinction between stable rock types is:____.
The most important distinction between stable rock types a and b and type c is. Degree and stability.
What is a defining feature of stable rock?Stable rock is defined as naturally occurring, solid mineral material that can be exposed while being vertically dug.
What is the most important rock type?Actually, there are many similarities between granite and basalt. Both of them are igneous rocks, which indicates that a magma caused them to cool (the earth gets very hot just below the surface, and there is lots of liquid rock available)
What are the 3 main rock classifications?Sedimentary, igneous, and metamorphic rocks are the three main categories of rocks. Each of these rocks is the result of physical processes that are a part of the rock cycle, such as melting, cooling, eroding, compacting, or deforming. Rock fragments from other types of existing rocks or organic material are used to create sedimentary rocks.
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In urban areas, an increase in impervious surfaces will cause ________.
less precipitation to fall
an increase in runoff
more precipitation to fall
a decrease in runoff
does not influence water flow or precipitation
In urban areas, an increase in impervious surfaces will cause an increase in runoff.
The region around a city is referred to as an urban area. Most people who live in cities work in non-agricultural industries. Urban areas are highly developed, which means there is a high concentration of human structures including homes, businesses, highways, bridges, and trains. Urban areas can include suburbs, cities, and towns.
A city or town is referred to as an urban example when it is densely populated. Urban rooftop gardening is defined as existing, occurring, or being in a city. acclimated to or typical of cities; citified: I don't think he would appreciate spending a week at our cottage in the woods because he is an urban type.
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earth science can help us learn about earth's past by studying why continents and oceans are different. how life in the past was different than today. why a landscape looks the way it does. all of these choices are correct.
These options are all legitimate possibilities. Given that the Earth is 4.6 billion years old, earth scientists use repeatable data and testable hypotheses to comprehend and explain our world.
Understanding the current characteristics and past evolution of Earth is the overarching goal of Earth sciences, and when appropriate, using this knowledge for the benefit of humanity.Thus, the primary goals of an Earth scientist are to observe, characterise, and categorise all aspects of the planet, whether or not they are distinctive, to develop theories to account for their existence and evolutionary history, and to create methods to evaluate the relative validity of competing theories. The concepts that are produced in this manner are the most tenable, agreeable, and durable.
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Air pollution
soil erosion
water pollution
global warming
Which best explains how sunlight can easily pass through the atmosphere, but heat energy radiated from the Earth’s surface has a harder time escaping the atmosphere?
The atmosphere has a different character from the bottom up verses the top down.
Sunlight moves at the speed of light (of course) while heat energy moves slow in comparison.
Each unique wavelength of radiation interacts differently with atmospheric gases.
Sunlight is mostly visible radiation while heat energy is hot.
The Sun is so much hotter than Earth.
Naturally, sunlight travels at the speed of light, whereas heat energy flows more slowly. Different atmospheric gases respond to radiation at different wavelengths in different ways.
Most of the sun's light is absorbed by the atmosphere. The Sun can't actually shine ON the air because it is usually quite clear. Yes, the Sun shines throug it. As a result, the majority of the Sun's heat energy reaches the surface instead of the air, warming the air as it reflects heat back up.Earth, however, is a planet and does not generate energy. However, at night, it emits a significant amount of energy in the form of terrestrial radiation (this energy is absorbed by earth during day time).
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Why does the local sky look like a dome? Define horizon, zenith, and meridian. How do we describe the location of an object in the local sky?
The local sky appears to be a dome as we only see half of a celestial equator at any given time from every location, while a ground obscures the other half.
What exactly is a celestial sphere?
The Celestial Sphere is just a projection of a gigantic imaginary burst with apparent spinning (concentric and coaxial) comparative to the Earth's Observer. On an annual basis, the Earth is a close object that orbits the Sun in a slightly circular elipse.
Would be Earth a celestial body?
The celestial sphere assumes that Earth is in the center of the infinitely long view. Stars, celestial bodies, constellations, and other celestial bodies are marked with three-dimensional coordinates.
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mass per unit volume but can be thought of as a measure of how heavy something is for its size. For example, an object that has low ________ is lightweight for its size and an object that has high ________ is heavy for its size. Density is an important property of ocean water because it determines the water's vertical position in the ocean.
An object that has low density is lightweight for its size and an object that has high density is heavy for its size.
Density refers to a measurement of material's mass per unit of volume. The density of material is the denseness of the material within a specific area. In other words, it is essentially a measurement of how tightly matter is packed together and is a unique physical property of a material. The principle of density was discovered by the Greek scientist Archimedes. The formula for density is given as d = M/V, where d is density, M is mass, and V is volume. It is a measure of how heavy something is for its size. Hence, if something is heavy for its size, it has a high density. If an object is light for its size it has a low density.
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explain how the physical geography of a place can impact the culture of its inhabitants
Geographical factors significantly influence how people live, which has an impact on culture. Rich soil, for instance, increases the likelihood of producing agricultural traditions.
But the freezing tundra does not. Fish will be more important to those who live near vast quantities of water than to people who live in dry climates. Geographical factors have an impact on culture in a number of ways. For example, people in the Sahara live as the desert demands, while Eskimos live as the cold and winter suggest. These factors both have an impact on the people's way of life and ability to survive. The region in which they lived had an impact on their customs and beliefs.
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Air pollution can influence a person’s quality of life. Which BEST identifies the influence of air pollution?
ABCD
Pilihan jawaban
It is a behavioral influence.
It is a genetic influence.
It is an environmental influence.
It is a dietary influence.
(A) It is a behavioral influence. Despite the significant effects of human activity on air pollution, this relationship has barely been studied.
Similar to that, not much research has been done on how air pollution affects how people behave. The goal of this paper is to evaluate the body of knowledge on air pollution and behavior, and to offer an organizational structure that highlights knowledge gaps and establishes a preliminary conceptual framework for further investigation. The paper discusses research on air pollution's effects on human health as well as its cognitive, emotional, and conative aspects. Additionally, the crucial functions of mediational constructs like pollutant controllability and adaptation are thoroughly discussed.
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Which of the following country is not a member of North American free trade area? A) China
B) Canada
C) Mexico
D) United States
Answer:
A) China
Explanation:
The North American Free Trade Agreement (NAFTA) was made between the north American countries, Canada, Mexico, and the U.S. in 1994.
grant’s strategy of maintaining the initiative against robert e. lee, thus suffering high casualties in the army of the potomac, earned him a reputation of the "butcher of men."
Grant lee won the Civil War in Appomattox Court House, Virginia.Robert E. Lee of the Confederate States, who was his main rival, had already capitulated, effectively putting an end to the uprising that claimed thousands of lives but liberated millions more.
But Grant's career was only getting started. After Andrew Johnson's disastrous presidency and the killing of Abraham Lincoln three years later, he was elected president and lasted two terms, leaving office as a renowned leader. After that, he managed a bank, lost his riches, and passed away from cancer, but not before writing the best presidential memoir ever. But this wasn't the end of Grant's tragedy; he would experience a kind of second death as his enemies highlighted the worst aspects of his character: his brutal tactics, his drinking, and the corruption in his administration. Few Grant monuments exist, and those that do are largely disregarded.
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