before there was any life on earth, which gas was absent from the ancient atmosphere?

Answers

Answer 1
Oxygen was absent on earth

Related Questions

which type of government would you most want to live? Why?

Answers

We would prefer to have a democrative type of government. The main reason is that everyone can participate in the affairs of the government through elections. It gives a sense of justice and equality to the people.

the spread of specialty coffee shops across the united states in the 1990s is an example of

Answers

Answer:

hierarchical diffusion

HELP ASAP!!!! With an explanation

Answers

Answer:

Idea, A, C

Explanation:

Because the idea hadn't formed to a theory because it had little to no evidence and A and C show the two continents connecting previously and explains that these animals couldn't of swam or flew all the way across the world supporting his idea of pangea.

One way that oil rich nations in southwest asia have protected their oil industries has been by:.

Answers

Answer: Creating a cooperative organization

Explanation: Several nations in the region have substantial wealth from oil sales. Most farms in Egypt are along the Nile River.

Problems related to the structure, aside from those caused by differential settlement or earthquakes, are usually found _____.

Answers

are usually found over openings and, less commonly, under roof eaves or in areas of structural overloading.

Which sphere do you think is the most important to study and why? Your answer should include information about all four spheres (hydrosphere, lithosphere, atmosphere, and biosphere).

Answers

Answer:

Hydrosphere

Explanation:

The lithosphere is the Earth's solid outer layer, which reaches a depth of around 100 kilometers (62 miles). The crust and the brittle upper mantle are both part of the lithosphere. The lithosphere is the most hard and coldest of Earth's layers. Tectonic activity is the most well-known aspect of the Earth's lithosphere. Tectonic activity is the collision of massive lithosphere slabs known as tectonic plates. The North American, Caribbean, South American, Scotia, Antarctic, Eurasian, Arabian, African, Indian, Philippine, Australian, Pacific, Juan de Fuca, Cocos, and Nazca tectonic plates make up the lithosphere. The Mohorovicic discontinuity, or simply the Moho, is a lithosphere divide that occurs between the crust and the mantle. Because not all sections of the Earth are in equal isostatic equilibrium, the Moho does not exist at a uniform depth. The physical, chemical, and mechanical contrasts that allow the crust to "float" atop the more pliable mantle are referred to as isostasy. The Moho can be found 8 kilometers (5 miles) beneath the sea and 32 kilometers (20 miles) beneath continents. Lithospheric crust and mantle are distinguished by different kinds of rocks. Gneiss (continental crust) and gabbro make up the lithospheric crust (oceanic crust). The mantle below the Moho is dominated by peridotite, a rock composed mostly of the minerals olivine and pyroxene. The gaseous envelope that surrounds the earth is known as the atmosphere. The many layers of the atmosphere were built based on their height and temperature. The elements that make up the atmosphere are also recognized and quantified. Due to changes in the earth's surface, this quantity might either rise or decrease. The biosphere is the zone that encompasses the hydrosphere, atmosphere, and lithosphere, and is where life exists and interacts. This zone has been well researched, and we are now able to grasp how life unfolds in response to diverse conditions. The terrestrial regions have been easily examined since it is easy to visit such locations, but it is not practical to research the structure and components of deep water bodies at a deeper depth. Although considerable information has been gathered in this area, the deep water component, such as deep marine trenches, has yet to be investigated. It is not conceivable since the pressure is quite high at this depth, and lift is generally impossible to achieve under these conditions. However, certain animal and plant species may thrive and flourish in this environment. As a result, considerably more research into the hydrosphere is required. The hydrosphere encompasses all of the earth's water bodies, including glaciers and icebergs.

Which process allows a population to become better adapted for survival in a specific environment? ecosystem selection genetic diversity natural selection species diversity

Answers

Answer: Natural selection

Explanation: Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others

The Canadian lynx is a wild cat uniquely adapted to hunting snowshoe hares in deep snow. The Canadian lynx is found in the northern United States and Canada. A climate model predicts the temperature will increase and reduce the area of snow cover in the Canadian lynx’s habitat. Draw a conclusion about the future of the Canadian lynx is the most likely if the climate model is accurate?

A.
The Canadian lynx will become extinct in the northern United States and Canada.

B.
The Canadian lynx will hunt other prey within the warmer habitat.

C.
The Canadian lynx will migrate to colder regions to find snowshoe hares.

D.
The Canadian lynx will reproduce with other cat species to survive in warmer habitats.

Answers

The Canadian lynx will hunt other prey within the warmer habitat. hence option B is correct

What is Adaption?

In Biological science, adaption is a term used to describe organisms blending with the environments, regardless of the prevailing climatic condition.

Hence, because of adaption the Canadian lynx will not migrate, but blend with the prevailing weather condition.

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what are the causes of global warming

Answers

Answer:

Deforestation

Oil and gas

Oil drilling

Power plant

Waste

What country borders the united states to the north.

Answers

Answer: Canada

Explanation:

North is above the US and above the US is canada

Answer:

canada

Explanation:

it is to the north

Infer an advantage of using passive or active solar systems.

A.
These systems have no need to access the sun for most of the day.

B.
The blocking of sunlight by structures has no impact on these systems.

C.
These systems release low amounts of carbon dioxide or other pollutants.

D.
There is no need for a backup system on cloudy days.

Answers

The advantage of using passive or active solar systems was these systems release low amounts of carbon dioxide or other pollutants. Thus, Option C is the correct statement.

What is the benefit of using Passive or active solar systems?

One of the best reasons to use effective solar technology is to reduce your energy bills. Active solar systems can include expensive hardware, and Passive solar systems may create the cost of renovating your home, but a reduction in your utility bills will ultimately outweigh the costs.

Thus, Option C is the correct statement.

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what is urban sprawl and how does it occur​

Answers

An Urban sprawl, also called sprawl or suburban sprawl, the rapid expansion of the geographic extent of cities and towns, often characterized by low-density residential housing, single-use zoning, and increased reliance on the private automobile for transportation

Honestly I believe it jsut occurs as time moves on and humans become more advanced

Answer:

Urban sprawl, also called sprawl or suburban sprawl, the rapid expansion of the geographic extent of cities and towns, often characterized by low-density residential housing, single-use zoning, and increased reliance on the private automobile for transportation.

in what u.s. state, which currently has the most active wildfires, could thousands of homes be threatened if the blazes continue to grow?

Answers

Answer:

calafornia

Explanation:

I know this cause I live there and learned it brainliest please

are there other solutions to help prevent the extraction and use of iron

Answers

Answer:

Other solutions to help prevent the extraction and use of iron are:

Lower-Impact Mining Techniques.

Reusing Mining Waste.

Eco-Friendly Equipment.

Rehabilitating Mining Sites.

Shutting Down Illegal Mining.

Compare the use of one wind turbine to 40,000 solar panels as an energy source in terms of the amount of carbon dioxide released.

A.
One wind turbine is a better energy source because the amount of carbon dioxide released during manufacturing is less that of 40,000 solar panels.

B.
One wind turbine is a worse energy source because the amount of carbon dioxide released during manufacturing is more than that of 40,000 solar panels.

C.
There is no difference between one wind turbine and 40,000 solar panels in terms of the amount of carbon dioxide released.

D.
40,000 solar panels is better energy source than a wind turbine because of the amount of carbon dioxide released during use.

Answers

One wind turbine is a better energy source because the amount of carbon dioxide released during manufacturing is less that of 40,000 solar panels. That is option A.

What is renewable energy sources?

Renewable energy sources are those energy sources that can be replaced or replenished naturally. Example of renewable energy sources are sun and wind.

The solar energy is gotten from the sun while wind energy is gotten from the wind.

According to research, one wind turbine produces 4.64 grams of CO2/1kWh while the solar panel produces 70 grams of CO2/1kWh.

Therefore, one wind turbine is a better energy source because the amount of carbon dioxide released during manufacturing is less that of 40,000 solar panels.

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You are an attorney arguing in court for preserving an old-growth forest that developers want to clear for a suburban development. Construct a strong argument for preserving this ecosystem

A.
a. Old-growth forests promote the survival of a wider range of organisms in an area

B.
Old-growth forests decrease the variety of habitats in an area.

C.
Old-growth forests decrease soil drainage and aeration in an area.

D.
Old-growth forests promote soil degradation and erosion in an area.

Answers

C.

Old-growth forests decrease soil drainage and aeration in an area.

How did airports encourage city growth? A. They promoted the building of hotels, restaurants, services, and rapid transit to accommodate travelers. B. They are so big and require so much land that they need a larger population to be sustained. C. They limit the effects of gridlock and make travel more pleasant. D. They were responsible for transporting over 13 billion tons of materials. Please select the best answer from the choices provided. A B C D.

Answers

Answer:

A. They promoted the building of hotels, restaurants, services, and rapid transit to accommodate travelers.

Explanation:

If more people are showing up to a city via air travel, the city will want to accommodate as many of those people as possible, so those tourists will spend money in those cities, which will grow economies, leading to more growth

These plants must be able to tolerate the _________ blown in from the sea as well as strong ________.

Answers

These plants must be able to tolerate the wind blown in from the sea as well as strong currents.

What are ocean currents?

This is the directional movement of water that is from the sea or other water bodies. The reason for the currents are wind, density and gravity.

When these forces act on the water, the effect is felt on the plants that are on the sea side.

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hello, can someone please help me compare and contrast Yellowstone National Park and Zion National Park

Answers

Yellowstone National ParkLocated in the western United States, largely in the northwest corner of Wyoming and extends into the states of Montana and IdahoKnown for its wildlife and its many geothermal features (ex : Old Faithful)Spans an area of 3,468.4 square milesNumerous recreational opportunities such as hiking, camping, boating, fishing, and sightseeingEstablished as a National Park in 1872

Zion National ParkLocated in southern United States in the state of UtahThe park has a unique geography and a variety of life zones that allow for unusual plant and animal biodiversitySpans an area of 229.1 square milesIncludes natural attractions like mountains, canyons, buttes, mesas, monoliths, rivers, slot canyons, and natural archesEstablished in 1919

Many American companies are moving their
manufacturing to China due to cheaper labor
costs.
True
False

Answers

Answer:

it is true

Explanation:

What tool can scientists use to observe soft tissue around fossil bones?.

Answers

Answer:

Electron microscope

Explanation:

In order to find fresh, uncontaminated surfaces of the bones to examine, scientists broke tiny pieces off the fragmented fossils

What is the population density of Monaco to the nearest whole number? Population: 32,671 Area: 1.2 square miles

Answers

The population density of Monaco to the nearest whole number will be 26337 per km².

What is population density?

It should be noted that population density simply means the concentration of individuals within a particular area.

In this case, the population density of Monaco to the nearest whole number will be 26337 per km².

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Generally speaking, if a cool surface
current flows along a coastline, what effect
might it have on the climate in that area?
a cooler temperatures in the summer
and milder temperatures in the winter
b. cooler temperatures in the summer
and colder temperatures in the winter
c. warmer temperatures in the summer
and milder temperatures in the winter
d. no long term effect on climate

Answers

the answer is C
explanation

angles that are 90 are called

Answers

Answer:

right angles

Explanation:

why does the water in the rivers flatulate?

Answers

Answer:

Because humans do not preserve the river even though it is the responsibility of humans

What is the difference between isolated and scattered thunderstorms.

Answers

Answer:

“Scattered” is used to reference showers or thunderstorms that are occurring across 1/8 through 4/8 of the total area covered by a particular weather forecast or radar image. “Isolated” refers to showers or thunderstorms whose areal coverage is less than 1/8 of this area.

Explanation:

Have a nice day!

Arab – Israeli Conflict : Diverse Perspective

Some of the following statements reflect the views of Arab Palestinians, some are more in line with the thinking of Israeli’s, and some are facts that both can agree on. Next to each one type AP for Arab Palestianians,
I for Isrealis
or B if both would agree to that statement.


The PLO as a governing body

Israel is the homeland for the Jews, we are God’s people.

Since 70 AD, we, the Arabs, have lived here.

Moses led the Hebrews here in Biblical times.

We started an Intifada in 1987 and 2000 because our voice wasn’t being heard.

Arafat was our first leader.

Rabin was a leader of our country.

Resolution 242 was passed to divide this area between the two sides.

We accepted Resolution 242.

We rejected Resolution 242.

Rabin and Arafat signed a
peace treaty in Washington D.C.

We agreed to give land back in exchange for peace.

We are the majority in the occupied territories.

We lost all our land after the Six Day War.

We were denied access to the Suez Canal by Egypt.

Black September attempted to get the world talking about our situation.

We were part of the Ottoman Empire.

We were attacked the day after declaring our independence.

We built a wall to separate them from us.

We currently control nearly all the land.

Answers

Israel is the homeland for the Jews, we are God’s people.

I

Since 70 AD, we, the Arabs, have lived here.

AP

Moses led the Hebrews here in Biblical times.

I

We started an Intifada in 1987 and 2000 because our voice wasn’t being heard.

AP

Arafat was our first leader.

AP

Rabin was a leader of our country.

B

Resolution 242 was passed to divide this area between the two sides.

I

We accepted Resolution 242.

I

We rejected Resolution 242.

AP

Rabin and Arafat signed a

peace treaty in Washington D.C.

B

We agreed to give land back in exchange for peace.

I

We are the majority in the occupied territories.

AP

We lost all our land after the Six Day War.

AP

We were denied access to the Suez Canal by Egypt.

B

Black September attempted to get the world talking about our situation.

B

We were part of the Ottoman Empire.

I

We were attacked the day after declaring our independence.

I

We built a wall to separate them from us.

B

What is the main advantage of using hydrogen, solar, and wind to generate power?

A.
They use a large amount of land.

B.
They have no environmental impacts.

C.
They do not produce greenhouse gasses.

D.
They are affordable for everyone to install.

Answers

Answer:

Solar power is pollution-free and causes no greenhouse gases to be emitted after installation

Reduced dependence on foreign oil and fossil fuels

Renewable clean power that is available every day of the year, even cloudy days produce some power

Return on investment unlike paying for utility bills

Explanation:

u did this

Explain the process of acid rain, and describe some of its negative effects. Please make sure to use complete sentences and proper grammar.

Answers

The cyclical process that involves the emission of sulfur oxide and nitrous oxides into the atmosphere leading to formation of clouds resulting in a rain, is known as an acid rain.

What is the significance of acid rain?

An acid rain is polluting in nature and is often described with a few negative effects on the environment. These effects occur mostly due to the acids present in the rainwater.

The negative effects of acid rain include,

Corrosion of steel structures;Weathering effects of stone buildings;Deforestation due to destruction of trees;Disturbance to the natural habitat of living beings.

Hence, the importance of acid rain is aforementioned.

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I could really use some help with this crossword :( I was absent all week and need the extra credit

Answers

Answer:

See explanation

Explanation:

1. Super Nova

2. Apparent Magnitude

3. One Parsec

4. Cosmology

5. Pulsars

6. Neutron Stars

7. Quasars

8. Brown Dwarf

9. Nebula

10. Constellation

11. Dark Matter or Dark Energy (not sure which one because they are extremely similar and I’m no scientist)

12. Gravity

13. Stellar Evolution

14. Red Shift

PLEASE mark me brainliest I spent 25 minutes working on this for you please and thanks.

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