this question is for brilliant student .

how to increase oxygen or how oxygen increased in earth because in many years ago at past earth has only have 2% of oxygen but know it has 22% of oxygen​

Answers

Answer 1

Answer:

  plants did it

Explanation:

The development of organisms capable of photosynthesis caused Earth's atmospheric oxygen to increase. These organisms use carbon dioxide and water to form sugar and oxygen.


Related Questions

4. If you were to travel from the west coast of Norway to the east custot
Sweden, at about 60 latitude, which climate regions would you
eperience?

Answers

I would experience Hot climate

Hi all, can you solve this please,

Answers

Answer:

amon gus

Explanation:

Việt Nam có những tiềm năng gì về tài nguyên du lịch cho phát triển du lịch quốc gia (national tourism)trong điều kiện hiện nay (2021)?

Answers

Answer:

ok brothersaya pon taktau

what are the implications of location shape and size of Ethiopia ad the horn on the physical environment socio-economic and political aspects

Answers

Answer:

Ethiopia is a country in Africa. With 1,104,300 km2, Ethiopia is the world's 27th largest country. The Rift Valley runs from southwest to northeast through the country, dividing this into two higher mountain plateaus.  Ethiopia is one of the world's poorest and least developed countries, and on the UN's list of countries after HDI, the country was ranked 157 out of 169 in 2011. According to UN figures, 44% of its inhabitants live below the national poverty line, 41% are malnourished and 39% live in extreme poverty.

Tornadoes Group of answer choices a. are rarely associated with hurricanes b. are associated with cold fronts c. occur primarily in the morning d. are called funnel clouds if they come into contact with the ground

Answers

Answer:

the answer is d. they are called funnel clouds

Which of the following was NOT a type of power that the Constitution granted to the national government ?

Answers

Answer:

Rights Reserved to States or People

The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

Describe how to demonstrate the physical properties of soil​

Answers

Answer:

wet soil : 1-3

dry soil 0.2-0.4

organic matter 0.25

clay 2.9

Explanation:

the physical properties of soil in order to decreasing importance for a ecosystem services such as crop production are texture, structure, bulk , density , potosity consistency, temperature, colour and resistivity

A thermally-driven circulation develops because: Group of answer choices in cold, dense air, isobars bunch closer together, while in adjacent warm, less dense air, they spread farther apart. aloft, high pressure develops in cold air regions while low pressure develops in warm air regions. at the surface, high pressure develops in warm air regions while low pressure develops in cold air regions. cold air rises and warm air sinks.

Answers

Answer:

Aloft high pressure develops in cold air regions while low pressure develops in warm air regions

Explanation:

A thermally-driven circulation, or thermals are the movement of warm air that move to a higher level due to the buoyancy forces acting on them. That is due to the difference in densities between the warmed and cool air

Given that pressure = Density, ρ × Gravity, g × Height, h, we have that decrease in pressure (low pressure) is due to low density, therefore, the warm air having low pressure, moves upwards, due to their low density

Therefore, the best option is aloft, (as we move higher), high pressure develops in cold air regions while low pressure develops in warm air regions

what is social harmony​

Answers

Answer:

Social harmony is the living together of people of a particular social group with love, care, respect and brotherhood, regardless of their religion, region, caste, gender, colour etc.

Which statement is true for all democracies?

A)They all have rulers who inherit power.

B)The leader holds all political power.

C)The people elect the leaders.

D) They are all ruled by a dictator.

Answers

Answer:

C

Explanation:

Democracies give the people the choice of who will lead and the leader will have to check in with the people when making decisions

Answer: C

Explanation: Democracy is a system of government by the whole population or all the eligible members of a state, typically through elected representatives.

10. Countries lacking natural resources, human resources, and capital resources would likely ____.

A)participate in a large number of international trading networks

B) develop a variety of commercial Industries

C) be poor and underdeveloped

D)rely on geothermal power

Answers

Answer:

c- be poor and underdeveloped

Explanation:

They don't have enough resources to make good money.

a. The rock cycle is the only mass-transfer cycle on the Earth. b. A biogeochemical cycle involves only physical components. c. The carbon cycle is an example of a purely geochemical cycle. d. The hydrologic cycle involves reservoirs above, below, and at the Earth's surface.

Answers

Answer:

D

Explanation:

The hydrologic cycle also known as the water cycle involves the movement of water between the reservoirs above (atmosphere), below (underground) and at the earth's surface

Please mark me as the brainliest

Explanation:

Imagine that you're a geographer and an urban planner and you're helping to plan a new shopping mall for your town you discover that most shopping malls exist in areas with large human populations such as in cities and large towns describe how you would use geographies three important questions to help you understand why this happens

Answers

Answer:

These questions provides information about the location where the shopping mall is built.

Explanation:

Where is it located? Why is it there? What is the significance of the location? These are the questions help us to understand the significance of the location where a shopping mall is built. We chose the location which is more suitable as well as present in more crowded area so that more people comes to the place. The location is chosen on the basis of earning more profit from the business so location or geography is very important for the business.

Surface features that are created when water dissolves limestone, like sinkholes and disappearing streams, are parts of Group of answer choices a potentiometric surface. a geothermal landscape. a karst landscape. an artesian surface.

Answers

Answer:

The correct answer is ''a karst landscape.''

Explanation:

A karst landscape is due to the erosion of water in limestone, that is, it is the surface of the earth resulting from the action of water on soluble rocks, in a slow dissolution process that takes thousands and even millions of years –approximately 5 mm of advance in the rock every hundred years–. The phenomenon is common in limestone rocks. This type of relief originated from the dragging or accumulation of soluble and disintegrated materials, such as those made up of carbonates. Limestone rock can decompose with water, since it is soluble; this solubility increases with the presence of acids produced by the mixture of CO2 and water, or by organic acids from the microbial activity of the soil. In this way, the limestone rocks fragment and form holes that, over time, give rise to various types and sizes of holes or depressions on the surface.

If an earthquake measures 1.5 on the Richter Scale, what is the intensity of this earthquake, relative to a 0-level earthquake? Round off your answer to the nearest integer.

Answers

Answer:

Intensity depends on the distance form the ground and source of energy.

Explanation:

Earth quake that has an intensity of 1.5 on the Richter scale can be detected only through the seismograph. The earthquake with an intensity of 0 levels on the Richter scale that is below micro will not be felt or rarely felt in scale. This can be defied by the Richter scale formula of  R=log(IcIn), Ic is the intensity and In is the intensity if the standards earthquake. Hence the difference will be R2−R1=log(I2I1)

Discuss the role of farming in South Africa​

Answers

Answer:

It has positively impacted the country.  

Explanation:

Farming has improved food security, helped to reduce poverty, and promoted economic growth. The rural population 70% of them, rely on agriculture as their main source of income.  This contributes to job creation and social welfare and ultimately promotes the health of the country, monetarily and physically by providing nutritious food to the community.  It is also 10% of their exports.

mối quan hệ giữa quá trình nội lực và ngoại lực

Answers

Answer:

The importance of categorizing a force as being either internal or external is related to the ability of that type of force to change an object's total mechanical energy when it does work upon an object. When net work is done upon an object by an external force, the total mechanical energy (KE + PE) of that object is changed.

Explanation:

in vietamnise/

Tầm quan trọng của việc phân loại một lực là bên trong hoặc bên ngoài có liên quan đến khả năng của loại lực đó để thay đổi tổng năng lượng cơ học của một vật thể khi nó hoạt động trên một vật thể. Khi công việc ròng được thực hiện trên một đối tượng bởi một ngoại lực, tổng năng lượng cơ học (KE + PE) của đối tượng đó được thay đổi.

What kind of energy is readily available almost everywhere?

A) solar

B) geothermal

C) nuclear

D) water power

Answers

Answer:

A. Solar Energy

Explanation:

solar is available mostly everywhere

Are mountains randomly distributed on the continents, or do they tend to occur in particular patterns (clusters, linear chains, arcs, etc.)?

Answers

Answer:

chains

Explanation:

The mountains are a geographic feature that is distributed in all parts of the world. The mountain develop in a particular pattern such as are found in chains, arcs, and ridges etc. The Himalayas are a range of mountains that lies along the Indian subcontinent. They are not randomly distributed.

What is the name for activities like fishing and mining?

A)primary economic activities

B)manufacturing activities

C)secondary economic activities

D)service Industries

Answers

Answer:

A. Primary Economic Activities

Explanation:

Discuss on the major problem of urban centres of ethiopia

Answers

Answer: Urban centers in Ethiopia are ridden by a variety of socio-economic issues such as illiteracy, unemployment, and especially poverty.

Explanation: They can also lack environmental management, lack of stability in infrastructure and buildings, as well as lack of investment in the local human population.  

While there has been an increase in construction, the quality of construction itself has been poor as the government has felt pressure to rapidly build in order to meet demand and immediate needs.  However this can mean very costly rehabilitation of the faulty construction in the future.  

In addition, in urban Ethiopia, women out number men which has contributed to the poverty level as their main source of employment is agriculture.  

Furthermore, many times there is only one main road within the urban centers which contributes to a lack of infrastructure and overcrowds the area.

Finally, there is also a lack of post secondary education and medical facilities.  

The particular animals of a given geographic region are called its __________.
A.
flora
B.
fauna
C.
packs
D.
herds

Please select the best answer from the choices provided.

A
B
C
D

Answers

Answer:

the answer must be fauna I guess

Use your knowledge about fault zones, their scarps, how related erosion and deposition processes evolve over several earthquake cycles, and seismic map patterns to identify the correct statements below.

a. Fault scarps are surface expressions of fault planes that result from differential motion along them, causing an earthquake.
b. Seismic gaps are regions along tectonically active boundaries that are safer than other regions.
c. Earthquake-generating fault motion never leaves any evidence in the geologic record that can be used to address future seismic hazards.
d. Fault scarp creation, erosion, and associated sediment preservation in the geologic record is a key process used in paleoseismological investigations.
e. Paleoseismology helps geologists with the challenge of addressing societies trying to live with earthquake hazards around the globe.

Answers

Answer: i think it's D

Explanation: sorry if it's wrong

The table lists the test scores William and Andre received on five math assessments.

William’s Scores Andre’s Scores
89
90
97
74
78
73
81
87
91
82
Which statement best describes the difference of the mean of the two data sets?

A.
It is equal to about 0.5 times the mean absolute deviation of either data set.
B.
It is equal to about 1 times the mean absolute deviation of either data set.
C.
It is equal to about 1.5 times the mean absolute deviation of either data set.
D.
It is equal to about 2 times the mean absolute deviation of either data set.

Answers

Answer:

B.) It is equal to about 1 times the mean absolute deviation of either data set.

Explanation:

Given the scores :

Williams :

89,97, 78, 81, 91

Andre :

90, 74, 73, 87, 82

The mean scores :

Mean = ΣX / n

William's mean score = 436 / 5 = 87.2

Mean absolute deviation :

[|89-87.2| + |97-87.2| + |78-87.2| +|81-87.2| + |91-87.2|] / 5

William's mean absolute deviation = 6.16

Andre's mean score = 406 / 5 = 81.2

Andre's mean absolute deviation =

[|90-81.2| + |74-81.2| + |73-81.2| +|87-81.2| + |82-81.2|] / 5 = 6.16

Difference of the mean = 87.2 - 81.2 = 6

Mean absolute deviation of each dataset = 6.16

The closest relationship between the mean difference and the mean absolute deviation is :

Mean difference is about 1 times the mean absolute deviation

Answer:

I hope this helps

Explanation:

The elevation of any landform is measured by the________​

Answers

answer: the elevation of any landform is measured by the ocean floor.
The elevation of any landform is measured by Relative sea level

Cotton is a leading vegetable crop as well as industrial crop discuss?

Answers

Answer:

becuase you use them for cleaning wounds and cleaning your face.

Explanation:

The particular animals of a given geographic region are called its __________.
A.
flora
B.
fauna
C.
packs
D.
herds

Please select the best answer from the choices provided.

A
B
C
D

Answers

Answer:

it must be fauna coz flora is for plants

Answer:

b) fauna

Explanation:

just took the test

Match each galaxy to its description.
elliptical galaxy
?
has a spiral shape
the Milky Way
does not contain much
?
gas or dust
irregular galaxy
?
has the least amount of
structure
SUBMIT


PLS HELP

Answers

Answer:

1. Irregular galaxies are galaxies, which have little to no symmetry in their structure (3rd option)

2. the milky way has a spiral shape (1st option)

3. elliptical glaxies does NOT contain much gas or DUST (2nd option)

Which line segment has the same measure as ST?

RX
TX
SR
XS

Answers

Answer:

SR

Explanation:

Line Segments RX and TC have the same measurement, and has a right angle at point X, this proves that SR is equal to the measurement of ST.

What is the current state of Communist China in the 21st century?

Answers

Answer:

China’s Communist Party turns a century old this July, a milestone that Beijing is celebrating with a crescendo of fireworks, theatrics and a fervent campaign to honor its revolutionary past.

The party has often lurched between tragedy and triumph between its birth as an underground movement and its current dominance over the world’s most populous nation. It seized power in 1949, and its early decades in government were tumultuous, with Mao Zedong launching radical purges and a disastrous industrial program that led to one of the deadliest famines in history.

Mao’s death in 1976 precipitated political and economic changes under Deng Xiaoping that would transform an impoverished nation into a global economic powerhouse.

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