1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
spin [16.1K]
3 years ago
11

Where did the original atmospheric oxygen come from

Geography
1 answer:
faust18 [17]3 years ago
3 0

The correct answer is - cyanobacteria.

The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.

You might be interested in
Although sand dumes are thr best known wind deposits accumulations of loess are very significant in some parts of the world. Wha
Reika [66]

Answer:

They are deposits of silt and mud carried by the wind.

They are found in regions close to but outside areas of glaciation.

There are deposits in Europe, North America, China, and Argentina.

Explanation:

Loess was first discovered and coined in Europe and refers to an important component of the soils of the European Plain. Loess consists of particles of silt, clay, and mud that have been carried by the wind and eventually deposited to form extensive formations.

Loess layers are not only deep but also conducive to agriculture as they are also fertile. Perhaps the most common source of loess is the glacial activity since the movement of glaciers produces a large amount of finely ground sediment on the fringes that is later picked up by the wind.

5 0
4 years ago
Which of the layers of the Earth has convection currents?
SSSSS [86.1K]
D.asthenosphere is the layer of earth that has convention currents
5 0
4 years ago
Define diminution and use it in a sentence.
Stels [109]

Answer:

Explanation:

Diminunition: the act of decreasing or reducing something.

The company suffered a diminution in profits.

(the best one I could make) Dimiunition affected the atmosphere by cutting down carbon emissions.

3 0
3 years ago
The population centers of Colombia are now:
MrMuchimi
Neeed the same aswer.
5 0
3 years ago
Read 2 more answers
Please help me friends ​
Zina [86]
1. The hydrosphere is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite.

2. The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth.

3.

4. Wind, Water Density, Ocean Bottom
Topography, Coriolis Effect

5. Sea Waves - In fluid dynamics, wind waves, or wind-generated waves, are water surface waves that occur on the free surface of bodies of water. They result from the wind blowing over an area of fluid surface.

4 0
3 years ago
Other questions:
  • Name two modern technologies that help us to monitor cyclones.
    15·1 answer
  • What mountain range is on the west side of the central valley?
    8·1 answer
  • 1. What type of glass is commonly used in making bottles? How did it get its name?
    10·1 answer
  • Assuming that the distance that the hanging wall moves along the fault plane is the same for two comparable reverse faults with
    12·1 answer
  • The two key concepts of Buddhism are:
    6·1 answer
  • In the lecture, the teacher discusses how the scarcity of _____________ is one of the most significant challenges facing people
    15·1 answer
  • What is Kitchener doing to reduce its carbon footprint
    7·1 answer
  • Which of the following is NOT an effect of the drug war in mexico?
    9·1 answer
  • Make long term recommendations about protecting rivers to the Government Department ​
    15·2 answers
  • Mont blanc, the matterhorn, and the jungfrau are all part of which mountain range?.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!