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
Nataly [62]
4 years ago
7

Which process do scientists think provided Earth with an oxygen-rich atmosphere?

Geography
2 answers:
zaharov [31]4 years ago
8 0

Answer:

photosynthesis

So how did Earth end up with an atmosphere made up of roughly 21 percent of the stuff? The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.

Explanation:

MrMuchimi4 years ago
4 0

Answer:

photosynthesis

Explanation:

Photosynthesis: Is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

You might be interested in
Which factor is the MOST accurate in determining the absolute age of two rocks?
Setler [38]

Answer:

C .radioactive dating each year

Explanation:

In determining the absolute age of two rocks, the most important thing is the radioactive dating of the rocks to compare the radioactive isotopes within them.

Absolute dating involves ascribing numerical age to a rock body. It is usually done by the process of radioactive dating in which the number of daughter to parent isotopes are compared.

This helps to give a precise numerical age to a rock.

  • The other choices are for relative dating.
4 0
3 years ago
Read 2 more answers
Which letter identifies the location of the Canadian Shield region of North America
Sedbober [7]

d would be the correct answer

8 0
4 years ago
Read 2 more answers
When did the caste system evolve into a four tiered hierarchy
Digiron [165]
When the Aryans ruled over the region
6 0
3 years ago
Earth's tilt over geologic time has stayed at 23.5 degrees since it was created. It has not varied.
Ipatiy [6.2K]

Answer:

b. False

Explanation:

  • Earths rotates on its axis that is tilted at 23.5° and is reconcile for different seasons on the planet. But the tilt in earth has not been the same since the formation of the planet that is about 4.5 billion years ago.
  • As the earth continued to evolve the Milankovitch cycle that is a cycle of f 40,000 years causes the planet to change its tilt. The tilt in the earth's axis varies from 22.5 to 24.5° and has done so in its geologic time.
7 0
3 years ago
If we compare Venus's atmosphere to that of Earth, we find that the temperature in the atmosphere of Venus decreases smoothly wi
Sedaia [141]

Answer:

Venus is one of the most hottest and inhabitable planet inside the solar system. While, there is a much of the exposure from the red giant or simple "the Sun". But, the certain form of gaseous composition inside the Venus's planet there are carbon atoms which are far denser then the corresponding elements.While, surface composition or we can just as during the making of the planets the elements which absorbs most of heat energy and are present at the higher degree of temperature,T they were present to build up the whole structure of the planetary core system is made of those elements.

  • Such form of planetary composition makes it even more hot and the temperature,T on the lower altitudes is far high then most of the planets inside the solar system.But, if we go up inside the atmospheric region of the planet there we will record the unusual effects of the temperature as the altitude level rises up.As there are heavy atoms inside atmosphere of the planet Venus and these Carbon atoms are much able to absorb most of the heat energy inside itself. As there are less free energy for the different instruments to measure while being on the higher altitude levels of the planet.
  • The Earth acts differently to the temperature,T values inside the atmosphere of the planet. As there are certain composition differences between the different celestial entities, while most of these elements present on the surface can have a normal level of temperature,T on it, the central region of the planet has a mixture of gases which makes to have a high level of heat energy in it.Along, with which the surface of the planet is covered by a different layers of gaseous composition consuming all the available amount of energy.As it leaves no amount of heat energy for the different atoms to posses inside them.

5 0
3 years ago
Other questions:
  • Which continent is at the coordinates 30°N, 45°E?
    6·1 answer
  • What are three examples of human features that you might use to describe a place?
    14·2 answers
  • When magma pushes sedimentary rock upward, a mountain is formed.
    7·2 answers
  • When did trade along the Silk Road reach it’s height?
    14·1 answer
  • Can someone help please
    11·2 answers
  • How did the South American Plate and the African Plate move? Explain using evidence you have collected so far. Use the words fro
    13·1 answer
  • Alvin ailey's revaltions assignment
    14·1 answer
  • Please select the word from the list that best fits the definition
    10·1 answer
  • WHICH COUNTRY IS THE MOST BEAUTIFUL IN THE WORLD.​
    15·2 answers
  • Earthquakes can produce what type of wave at the surface of the land?.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!