Iridium, a hard, whitish metal similar to platinum, is extremely rare on Earth. Extremely high concentrations of iridium on Earth result
from only two scenarios: massive volcanic eruptions that release iridium from deep within the Earth and meteorites that shower down on Earth from space. When scientists found concentrations of iridium 30 times higher than normal in rock stratum from 65 million years
ago, they concluded that a massive meteor or comet hit the Earth and caused the massive extinction of the dinosaurs.
Which of the following, if true, most strongly supports the scientist’s conclusion?
A. Volcanoes massive enough to generate high concentrations of iridium are very rare.
B. Massive volcanic eruptions occurred frequently 80 million years ago.
C. Most scientists support the hypothesis that a cosmic impact wiped out the dinosaurs.
D. The massive extinction that occurred 70 million years ago killed not only the dinosaurs but also 70 percent of all life on Earth.
E. A comet struck the earth some 120 million years ago, but no widespread extinction occurred.

Answers

Answer 1

Answer:

B. massive volcano eruptions occurred frequently 80 million years ago

Answer 2

Massive volcanic eruptions occurred frequently 80 million years ago is most strongly supports the scientist’s conclusion. Therefore, option B is correct.

If massive volcanic eruptions occurred frequently 80 million years ago, it suggests that the high concentrations of iridium found in the rock stratum from 65 million years ago could be attributed to these volcanic eruptions rather than a cosmic impact.

This would weaken the argument that a meteor or comet caused the extinction of the dinosaurs, as an alternative explanation for the elevated iridium levels is provided.

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Related Questions

In addition to Arabic, which languages are spoken by large groups in Southwest Asia?

Answers

Answer:

Hebrew

Explanation:

Israel is in Southwest Asia

What are the most appropriate metric units to use to measure? 1. The distance to the door. 2. The amount of water in a glass. 3. The weight of the homemade chocolate chip cookie you wish you had. 4. The distance between you and the nearest stop light.

Answers

Answer:

1 and 4

Explanation:

because they are measures of nearness or farness(distance)

2. is a measure of volme while 3. is a measure of weight

plz answer Name two theories that explain the origin of the solar system

Answers

Answer: When it comes to the formation of our Solar System, the most widely accepted view is known as the Nebular Hypothesis. In essence, this theory states that the Sun, the planets, and all other objects in the Solar System formed from nebulous material billions of years ago .

Answer:

The big bang theory and what peoples religion say  

Explanation:

In which mountain range can you find Rich Mountain the highest peak in Oklahoma Region? A. the Ouachita Mountains B. the Ozark Mountains C. the Wichita Mountains D. the Arbuckle Mountains

Answers

The Ouachita Mountains

Answer:

A.) the Ouachita Mountains

Compare and contrast spatial variation and spatial association

Answers

Answer:

The difference now is that the object involves some kind of computation. And there is a strong emphasis on physicality, form, and tactile ...

Porosity increases:_________. a. when grains settle more closely together after deposition.b. with increasing crystallization between grains in sedimentary rock. c. with the cementing of sediments by minerals from groundwater. d. when rocks develop joints or fractures.

Answers

Answer:

The correct solution is Option d (when rocks develop joints or fractures ).

Explanation:

Porosity is observable from descriptive samples taken. The drawbacks of receivable dams are that this is impossible to make true reflection temperature measurements, specific side-wall concrete samples while being often valuable can also result in poor coverage as well as dependence on log-derived porosity seems to have become the standard.As porosity rises, too much wind needs to pass further through most of the shelterbelt, which would be to say the less significant decrease in wind direction.

Some other available scenarios have no connexons with the particular circumstance. So this seems to be a reasonable option.

definition of region

Answers

Answer:

an area or division, especially part of a country or the world having definable characteristics but not always fixed boundaries

Answer:

An area or division

Explanation:

Name two planets without satelites

Answers

Answer:

Mercury and Venus

Explanation:

Which of the following laid the foundation for cartography, the art
and science of mapmaking?
A. Ancient Egyptians
B. Early Europeans
C. Ancient Romans
D. Arabs
E. Ancient Greeks
tosth

Answers

It was E. Ancient Greeks

What are the major river and mountain chain of the northeast region of the united states called?

Answers

Answer:

The mountains from  northeast region of the United States are called Appalachian Mountains.

The major river is Saint Lawrence River.

a lever
The mechanical advantage
advantage of
is 4. what does it mean 2​

Answers

Answer:

It means the measure  of the force amplification achieved by using a tool, mechanical device or machine system

In simple words , it means  the advantage gained by the use of a mechanism in transmitting force is 4

Explanation:

Explain the accommodation sector of the hospitality industry

Answers


Accommodation is an absolutely broad sector of the hospitality industry, ranging from bed & breakfast enterprises and hotels to other facilities that offer lodging services.

Again, customer service is indispensable in providing accommodation services. And that isn’t all – efficiency, integrate comfort, and world-class amenities are also its foundation

An extravagant resort, for instance, should offer its customers privacy and exclusive services to cut it in the niche.


Hospitality industry is an industry within the service industry.

The Hospitality industry is one that provides the service of lodging, event planning, theme parks, cruise line, tourism to customers who seeks to have them.

The accommodation sector of the hospitality industry can be said to fall under the Lodging sector of the industry

The accommodation sector does provide the service of bed, bed enterprises & breakfast enterprises, hotels facilities etc in the lodging centre.

Therefore, in conclusion the accommodation sector is a broad sector of the hospitality industry,

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early islam’s historical role in central asia

Answers

Answer:

Islam entered Central Asia, when during the 8th century there was a Muslim conquest.

If Earth did not experience the greenhouse effect, Choose one: the temperature of Earth would be much cooler. Earth would not receive as much radiation from the Sun. the temperature of Earth would be the same. there would be more liquid water.

Answers

Answer:

The temperature of Earth would be much cooler

Explanation:

The greenhouse effect is earths atmosphere being polluted by gasses that prevent heat from escaping as easily causing earth's temperature to rise and if that didnt exist earth would probably be alot cooler.

The temperature would be much colder on earth


Identify and briefly describe the major factors which create
four separate and distinct seasons for the people of Indiana .

Answers

Answer:

tilting of the earth.

Explanation:

Tilting of the earth is the factor which is responsible for seasons. Those areas which receives direct sunlight have hot climate such as areas at and near equator, while those areas which are nearer to the poles have cold climate. During spinning of earth, it tilted which causes seasons. There are certain planets which has no tilting so there is no season on that planet while our earth tilted about 23.5 degree which is the main cause of 4 seasons in different countries like Indiana.

Approximately how far back in time does the fossil record extend? Approximately how far back in time does the fossil record extend? 3.5 billion years 5.0 million years 5.0 billion years 3.5 million years

Answers

Answer:

A : 3.5 billion years ago

Approximately about 3.5 billion years ago the fossil record extend.  The reason the correct option is a.  

According to radiometric dating, Earth formed around 4.5 billion years ago. The oldest fossils, which are found in rocks older than 3.5 billion years (see Precambrian epoch), resemble creatures like bacteria and cyanobacteria (blue-green algae). The so-called Ediacara fauna, which consists of small, soft-bodied wormlike organisms, is where the oldest animal fossils, dating back roughly 700 million years, may be found. In rocks that are around 540 million years old, there are many fossils with mineralized skeletons that belong to several living phyla.

The oldest fossils date back between 3.48 and 4.1 billion years. A geological timescale and the relative ages of various fossils were recognised in the 19th century as a result of the discovery that specific fossils were linked to specific rock strata.

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how are the mississippi and amazon rivers differ? Check all that apply a- The Amazon acts as more of a barrier to movement b- The Amazon is much harder to get to c- The Amazon is surrounded by farmland d- the amazon has more industry around it Thanks!!

Answers

Answer:

A-The Amazon acts as more of a barrier to movement

b- The Amazon is much harder to get to

c- The Amazon is surrounded by farmlands

Explanation:

The Amazon river has surroundings which are largely underdeveloped with large amount of plant life. They also inhabit lots of animal life too.The surroundings are hard to get to due to poor road network.

The Mississippi River however is found in a more developed industrial area and lacks a dense plant population with good road networks.

Answer:

A-The Amazon acts as more of a barrier to movement  

b- The Amazon is much harder to get to  

c- The Amazon is surrounded by farmlands  

Explanation:

The Amazon river has surroundings which are largely underdeveloped with large amount of plant life. They also inhabit lots of animal life too.The surroundings are hard to get to due to poor road network.  

The Mississippi River however is found in a more developed industrial area and lacks a dense plant population with good road networks.

solve this please give the correct answer​

Answers

Answer:

1. Terminalia arjuna2. Mango3. Indian gooseberry4. Lilly.5. Blueberries.6. guavas

Explanation:

The Arjun tree has conical leaves and grey bark and pale yellow flowers and is seen across the Indian subcontinent and appears between Sept and November. Mango is called the king of fruits and it reduces the symptoms of heat strokes. Aam Panna is a traditional drink that is made of raw mango in the summer season. The amla or Indian gooseberry is an edible fruit that improves eyesight and brain functions. The lily flower is a herb that is used for treating many of the problems of the body related to heart, joints, and intestine problems. The fruit of blueberry is a natural blood purifier and stops the growth of cancer cells. Guava is a native of Mexico it removes the disorders of the stomach and heals wounds.

Uniformitarianism means:________. a. neither the scientific past nor the future can be predicted because physical laws change over time. b. earth's surface, including the oceans and continents, has always been the same and will always remain unchanged. c. geologic processes on Earth all operate at roughly the same speed, which has not changed over time. d. geologic processes that operate today operated in the past at about the same speed.

Answers

Answer:

Uniformitarianism means:

d. geologic processes that operate today operated in the past at about the same speed.

Geologists study present geologic processes, whether they are sudden, like an earthquake, or slow, like the erosion of a river valley, to gain insight into the past. This is known as uniformitarianism.

Thus, option D is correct.

Who made uniformitarianism?

The theory of uniformitarianism was developed by Charles Lyell in the 19th century and is based on the writings of James Hutton. According to this hypothesis, the forces and processes that can be seen at the surface of the earth are the same ones that have sculpted the planet's terrain throughout natural history.

The belief that the same natural laws and processes that govern the universe today and have always governed it in the past and apply to all of it is known as uniformitarianism, also known as the Doctrine of Uniformity or the Uniformitarian Principle. Today, we accept uniformitarianism as genuine and understand that major catastrophes like earthquakes, asteroids, volcanoes, and floods are a regular part of the earth's cycle.

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Which of the following is correct about floodplains? Which of the following is correct about floodplains? Floodplains are not associated with deposition. They are generally filled with layers of alluvium. Despite the name, they are rarely subjected to flooding. They are well drained throughout. They are an erosional feature located within a depositional feature.

Answers

They are generally filled with layers of. the following is correct about floodplains. Thus option (A) is correct.

What are floodplains?

A bottomland, floodplain, or floodplain is a region of land next to a river that runs from the channel's banks to the foot of the valley's surrounding walls and is subject to flooding during times of high discharge. The soils are typically made up of clays, silts, sands, and that have been left behind by floods.

Floodplains frequently have high soil fertility because regular flooding can deposit nutrients and water; some significant agricultural regions, such as the Mississippi river basin and the Nile, heavily rely on the floodplains.

The Mississippi River has a large floodplain covering large portions of midwestern states through which it flows. Ninety percent of this area is no longer flooded annually due to levees designed to hold the water back.

Therefore, option (A) is correct.

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select the terms that describe a cultural influence on a region.

a. the city is bordered by water on three sides

b. forests are cleared to provide space to grow crops

c. female children may only attend school until they are ten years old

d. the tallest mountain on the continent is located here

e. new year’s eve is celebrated by shooting fireworks out into the sea

f. membership in club pretentious is restricted to individuals whose assets are greater than $1 million

Answers

c. female children may only attend school until they are ten years old

e.new year’s eve is celebrated by shooting fireworks out into the sea

Membership in Club Pretentious is restricted to individuals whose assets are greater than $1 million.

Female children may only attend school until they are ten years old.

New Year's Eve is celebrated by shooting fireworks out into the sea.

Forests are cleared to provide space to grow crops.


Describe how voting changed in America from the early days to the present.

Answers

Hey there! I'm happy to help!

There are many ways that voting has changed in America. When America was founded, only property-owning white males could vote.

During the end of the 18th century to about the mid-1800s the part that you had to own property was removed.

In 1870, the 15th amendment was passed, which allowed males of all races to vote.

In 1920, the 19th amendment gave women the right to vote.

Decades later, the 23rd amendment let residents of Washington D.C. vote.

The 17th amendment also let the people choose who their Senators would be, not the Legislature.

I hope that this helps! Have a wonderful day! :D

Which word best describes early American foreign policy?

Answers

Answer:

I would say difficult

Explanation:

Because the American foreign policy was a brutal law.

Respond to the following question in a paragraph or less.
Explain the relationship between a thriving civilization and it's agriculture system?

Answers

Answer:

Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago. ... Pigs, sheep and cattle were domesticated over 10,000 years ago.

Explanation:

What season is it in St. Petersburg, Russia on March 30th?

Answers

Answer: spring!

Explanation:

there is no real explanation :)

'Season' is described as the 'divisions of time across the year according to the changes experienced across various environmental factors.'

- The season that resides in St. Petersburg towards March-end would be the 'Spring Season.'

The season depends on various factors:

Change in the ecology of the location. Variation in the climate of the place. The alterations in the atmospheric situations throughout the year. The hours for which the place receives daylight.

As per the meteorological reports, the season in St. Petersburg during March is the Spring season.

The temperature ranges between 24.4°F and 35.6°F with a mean of 4hours of sunlight per day.. It is the very beginning month of the spring season and therefore, cold is experienced by the inhabitants during this time. A slight rainfall is also expected that allows the flora of the place to grow and bloom.  

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Without the North Atlantic Drift, which of the following statements about Scandinavia’s climate would be true?
A.
It would have much warmer temperatures and less rain.
B.
It would have much warmer temperatures and more rain.
C.
It would have much lower temperatures and more rain.
D.
It would have much lower temperatures and less rain.

Answers

Answer:

B.

Explanation:

The warm waters moderate the weather so its not as cold as it should considering its latitude. Also when the atmosphere is warmer it can hold more moisture adding to rainfall.

Answer:

Yes the answe is B

Explanation:

During the Soviet Era, the government had a great effect on agriculture. Do you believe that the system of agriculture was subsistence farming or commercial farming, or a combination of the two? Explain.

Answers

Answer:

A combination.

Explanation:

The government mandated that most crops grown under Soviet rule would be given to the gov. to redistribute to people in need; however this caused great hunger and people started to farm on the side for substinence. Now hardcore socialists believe commercial farming is not applicable to government-takeover of crops, but I call it commercial since there was "compensation" to the farmers (not really lol).

During the Soviet Era, the government had a great effect on agriculture. The  believe that the system of agriculture was subsistence farming or commercial farming, or a combination of the two are the limited cultivation of private plots.

What is government?

The term “government” refers to a legal authority or system that is controlled and directed by an office, public sector, country, or state. The government imposed the law. The most common functions of the government are leadership, controlling, maintaining order, commanding, providing public services, and national security.

Agriculture in the Soviet Union was primarily collectivized, with some individual parcels being farmed. The government stipulated that the majority of food harvested under Soviet authority be provided to the government for redistribution to persons in need. Socialists think that government-takeover of crops does not apply to commercial farming.

As a result, the Soviet Era, the government had a great effect on agriculture.

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what season is it in tokyo, japan on june 30th

Answers

Answer:

Hey there!

June 30th marks the start of Japan's summer months, which are July and August.

Let me know if this helps :)

A thrust fault increases the thickness of the crust as it moves toward a continental interior in a mountain belt; yet the crust beyond the mountain front stays the same thickness. Isostasy would suggest that the area at the mountain front, where the thrust emerges, should ________ over time.

Answers

Answer:

subside

Explanation:

Isostasy is a geographical term which describes the condition of gravitational equilibrium that exists within the Earth's crust and mantle, there by, making the crust stays above a heights that relies on its physical attributes, such as thickness and density.

In Isostasy, its occurrence process involves principles of buoyancy in which an Earth crust apply stress on the less stronger mantle, such that for over a geological time moves laterally in a way that the load is contained by height adjustments.

Hence, Isostasy would suggest that the area at the mountain front, where the thrust emerges, should SUBSIDE over time.

What aspects of the geography affect the France imports and exports?

Answers

Answer:

Large agro-industrial products, abundance natural resources, dairy products less of oil and natural gas.

Explanation:

Geographic factors that are based on location like climate, relief features, and soil type, market size affects the imports and exports of the country. France is the world's six largest leaders in agricultural power. France is a leading producer in wheat and accounts for the largest share in agricultural exports.  Apart from that France is the world's most popular tourist destination and sees visitors each year. The main imports of France are industrial chemicals, aircraft, and engines, electronic components, telecommunications, computer software. France has a Mediterranean climate and is known for the high quality of vines in the world.
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