what did rusted layers of iron in sedimentary rock tell geologists about the chemical composition of the oceans long ago?

Answers

Answer 1

Answer:

They knew there was dissolved iron in the early oceans -- a strong indication that Earth's free oxygen concentrations were exceedingly low.

Explanation:

hope this helps


Related Questions

can you help? thank you..

Answers

Answer:

The answer is normal fault

Explanation:

normal fault- an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall common fault, gravity fault inclined fault- a geological fault in which one side is above the other.

which of the following pairs of b countries share a border? belgium & bulgaria brazil & bolivia belize & barbados belarus & bangladesh

Answers

Based on geographical analysis, the pair of B countries that share a border is "Brazil and Bolivia."

Where are Brazil and Bolivia?

Both Brazil and Bolivia are located in South America continent.

Bolivia is located in the west of Brazil.

Brazil is surrounded by countries like Paraguay, Uruguay, Peru, Bolivia, Colombia, Venezuela, among others.

Hence, in this case, it is concluded that the correct answer is option B. Brazil and Bolivia.

Learn more about geographical location here: https://brainly.com/question/12790602

Study the map above. Which city is located at approximately 51° N, 0°?

Answers

Answer:

I believe it's London? Correct me if I'm wrong because you didn't give a map, but London is 51 N, 0 W.

For an ecosystem to be classified as a forest, more than
of the land must be covered by trees.
50 percent
10 percent
20 percent
90 percent

Answers

Answer:

10%

Explanation:

According to the UN FAO

Which practices can be used to protect our supply of freshwater?

reduce trade restrictions
increase conservation
reduce dependence on fertilizers and pesticides
decrease biodiversity
improve waste management systems

Answers

Hope this helps in your study

megathrust faults occur on which type of tectonic plate boundary?

Answers

Answer:

they occur at convergent plate boundaries

See if you can explain why it takes six times as much water to produce 1 kg of beef as 1 kg of rice.

Answers

Answer:

because beef is denser than rise and there is also a larger surface area than the rice so it takes more water whereas the rice is just lots of seperate pieces and has a smaller surface area so therefore you don't need as much

Beef is denser and contains a larger surface area than rice does

why is the world bank better than other supranational organizations? PLEASE HELP ILL GIVE BRAINLIEST

Answers

[tex] \: \: \: \: \: [/tex]

It has good credit because it has large, well-managed financial reserves. This means it can borrow money at low interest rates from capital markets all over the world to then lend money to developing countries on very favorable terms.

hope it helps

An area located on the edge of a desert, with a semiarid climate, is known as a:

Answers

Answer:

An area located on the edge of a desert, with a semiarid climate, is known as a steepe

Which of the following would be a PUSH factor of a country?
A. High Life Expectancy
B. Large Gross Domestic Product
C. Overpopulation
D. Large infant mortality rate

Answers

Answer:

D

Explanation:

A push factor is pushing migrants away from a country having a mortality rate of children would puah anyone away

How were the europeans affected by the deseases they brought to the natives?​

Answers

Answer:

Europeans brought deadly viruses and bacteria, such as smallpox, measles, typhus, and cholera, for which Native Americans had no immunity (Denevan, 1976). On their return home, European sailors brought syphilis to Europe.

PLS ANS FAST.
Name the process of wind erosion in which the loose particles of sand act as a sand paper.

Answers

Answer:

Abrasion is the answerrr

When you think of the word “Africa,” what images or ideas come to mind? Where do these ideas come from?

Please help this is due today and I really need help.

GIVING BRAINLIEST

Answers

Answer:

I personally think of the wildlife and tribes of Africa :)

Explanation:

These ideas come from the influence of the media

what most likely led to the formation of the north american continent?

Answers

Answer: The settlement of the Americas.

Explanation:

The settlement of the Americas is widely accepted to have begun when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum (26,000 to 19,000 years ago). These populations expanded south of the Laurentide Ice Sheet and spread rapidly throughout both North and South America, by 14,000 years ago. The earliest populations in the Americas, before roughly 10,000 years ago, are known as Paleo-Indians.

Answer:

What MOST likely led to the formation of the North American continent? Earthquakes broke large pieces off the edge of the continent. The tectonic plates sank into the ocean, making way for new continents to form. Hurricanes caused floods that submerged much of the continent.

Explanation:

HOPE ITS HELP;)

What is the biggest county in the Upper Peninsula of Michigan? Pls no links

Answers

Answer:

Marquette County

Explanation:

in the stratosphere, which important feature blocks harmful rays from the sun?

Answers

The ozone is an important feature which blocks out the radiation

What is the main religion in the shaded region?
A) Hinduism
B)Buddhism
C)Islam
D)Christianity

Answers

Answer:

Option C, Islam.

Explanation:

The shaded region is very close to regions like Arabia, Pakistan, South Africa, and more like Dubai. In these places, only Islam can be followed.

Hoped this helped.

Drag the country to the correct box

Answers

Answer:

Explanation:

malaysia - Malaysia: Food and beverage and semiconductors the mainstays of the economy

With a nominal GDP of around $452bn, Malaysia is the 6th largest economy. The country’s strength is its industry production, with around 4% of production focussed on machinery. The largest sectors are food and beverage, accounting for 22.5% of total output, semiconductors and electronic components (19.2%) chemicals and pharmaceuticals (10.1%) and electrical/electronic equipment and metals both accounting for just over 9% of total output.

vietnam : has become a largest financial centre

Vietnam: High tech is the motor of economic and social change      

low paid jobs : singapore

What climate zone are you in if the temperatures are always very warm? Where is this zone located on Earth.

Answers

You are near the equator, which is part of the tropical zone

How were patterns of trade affected after the opening of this major engineering project?

Answers

Answer:trading ships could travel easier around south america

Explanation:

Trade liberalization came initially, followed by vertical specialization, income convergence, and changes in regional and global trade patterns.

What are global trade patterns?

Trade is the process by which nations exchange commodities and services. A country's purchases are referred to as imports, and its sales to other nations as exports.

Developed nations account for a larger portion of world trade than developing nations. A country's import and export balance, as well as its overall commerce with the rest of the globe, are likely to alter throughout time.

Net exports, which are determined by subtracting imports from exports, are what determine a nation's trade balance, which is affected by all the variables that influence global commerce.

Trade policy, exchange rates, foreign currency reserves, factor productivity, inflation, and demand are a few of them. The sale or acquisition of goods or services across international borders is referred to as global trade.

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According to cell theory, all living organisms are made of — A. cells, and all have similar needs, such as a source of energy. B. tissues that perform a different function. C. organelles that formed from a variety of cells. D. organs, and all have different needs, such as source of oxygen.

Answers

Answer:

A, I believe

Explanation:

Activity
The Tuareg are a Berber community of traditionally nomadic peoples. They make their homes in the Sahara desert of North Africa. Review this
brief description of their lifestyle C, and compare it to your own day-to-day life. In the table below, describe 6-10 details about the Tuareg
community's way of life that are in clear contrast to your family's way of life.

Answers

Okay I’ll call when I

How can our society progress?​

Answers

[tex] \: \: \: \: [/tex]

Social progress is often improved by increases in GDP, although other factors are also relevant.

question that related to the topic

Why is progress important to society?

Social progress is a necessary component of development. Healthy and educated individuals are far more able to contribute to the well-being and advancement of their societies.

hope it helps

in homes located in areas having a history of ice forming along the eaves an ice barrier consisting of at least _____ layers of underlayment cemented together

Answers

Answer:

There would be at least two layers

Hope this Helps

how will cities need to change to accommodate growth- multiple examples

Answers

Cities can change to accommodate a growing population by building industries to allow for the employment of teeming youths. Provision for housing, increased exportation, and favorable economic policies should also be put in place to facilitate growth.

For a city with a fast-rising population, it is imperative that accommodation be made for the young ones.

The government should build industries that will get the population usefully engaged.

Good economic policies that will strengthen the nation should be made. Housing is another factor that should be catered to, so that the populace can have shelter.

Learn more about the growth of cities here:

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how does latitude and altitude affect the climate of india

Answers

Answer:

Latitude: As the earth is round, sunlight does not reach everywhere equally. The temperature decreases as we move from the equator to the poles. Altitude: As we move from the surface of the earth to the higher altitudes, the temperature decreases. ... Thus, it influences the temperature accordingly.

Explanation:

hope it helps

What stage is texas in the demographic transition level

Answers

Level five I believe I just answered for the points

Free Response Question

A. Identify the major religion and the ethnicity in the documentary Fordson: Faith, Fasting
and Football. (4 pts)
B. Describe the town of Dearborn, Michigan. (4 pts)
C. Explain the migration process and patterns that brought many Muslims to Dearborn,
Michigan and the economic impact Arabs have on the community. (6 pts)
D. Explain how the culture of the Muslim residents of Dearborn diffused with the existing
American culture. (4 pts)
E. Define Ramadan. (2 pts)
F. Explain how Ramadan affected the football team and players at Dearborn Fordson High
School. (4 pts)
G. Explain how religion and ethnicity are both a centripetal and a centrifugal force in
Dearborn, Michigan. (4 pts)
H. Compare the similarities and differences of Dearborn Fordson High School with Naples
High School. (Hint: be sure to make geographic connections in your response) (4 pts)

Answers

Answer: A. Muslim High School Football Players Stay Close to Home.

B. a documentary about Fordson High School’s football team, whose ranks are drawn from the predominantly Arab population of Dearborn, Mich. They hear a gripping audio montage of anti-Muslim tirades.

C. Fordson High School’s enrollment is more than 90 percent Muslim, and this week of two-a-day practices coincides with Ramadan, the Islamic holy month of fasting, when adherents refrain from eating and drinking during daylight hours.

D. They we’re doing week of two-a-day practices coincides with Ramadan, the Islamic holy month of fasting, when adherents refrain from eating and drinking during daylight hours.

E. The ninth month of the Muslim year, during which strict fasting is observed from sunrise to sunset.

F. They learned more about Ramadan and they also experienced it.

Explanation:

I don’t know H but I’ll try to find out what it is have a  day!

How does oceanic current affect weather?

Answers

Answer:

Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. ... The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe.

Explanation:

It sends heat towards the polar regions to help tropical whether cool off.

What was the most significant Strength and Weakness for The American and British Army? Use video"British and American Strengths and Weaknesses" by Waldo Middle School Social Studies

Answers

Answer:

British Strengths:

*Some of those funds were used to hire Hessian mercenaries to fight the Americans.

*Britain's military was the best in the world. Their soldiers were well equipped, well disciplined, well paid, and well fed.

*The British navy dominated the seas. Funds were much more easily raised by the Empire than by the Continental Congress.

British Weaknesses:

*The British had an extremely difficult objective. They had to persuade the Americans to give up their claims of independence.

*The geographic vastness of the colonies proved a hindrance to the British effort. Despite occupying every major city, the British remained as at a disadvantage.

*The British fought a war far from home. Military orders, troops, and supplies sometimes took months to reach their destinations.

American Strengths:

*Americans had a grand cause: fighting for their rights, their independence and their liberty.

*This cause is much more just than waging a war to deny independence. American military and political leaders were inexperienced, but proved surprisingly competent.

*The war was expensive and the British population debated its necessity. In Parliament, there were many American sympathisers. Finally, the alliance with the French gave Americans courage and a tangible threat that tipped the scales in America's favour.

Americans Weaknesses:

*The Americans had tremendous difficulty raising enough funds to purchase basic supplies for their troops, including shoes and blankets.

* The British had a winning tradition. Around one in five Americans openly favoured the Crown, with about half of the population hoping to avoid the conflict altogether.

*Most Indian tribes sided with Britain, who promised protection of tribal lands.

Explanation:

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