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
Leto [7]
3 years ago
15

Earth's early atmosphere was primarily composed of

Biology
1 answer:
Paul [167]3 years ago
5 0

Answer:

The correct answer is ''carbon dioxide, water vapor and nitrogen.''

Explanation:

About 4.5 billion years ago, Earth was a very geologically active planet. So many volcanic fumes formed the primitive atmosphere, which was mostly made up of water vapor, carbon dioxide, sulfur, and nitrogen. At this point, oxygen was barely present and the oceans did not yet exist. The primitive atmosphere is the one before the Precambrian, it was reductive, that is, it lacked free oxygen, and only had ammonia, methane and hydrogen, the high temperature of the atmosphere in its early stages facilitated the reaction of these gases to form organic compounds from which life may have emerged. UV rays passed, because ozone did not exist.

You might be interested in
¿Qué caracteriza el magma de los volcanes?
Sati [7]

Answer:

El magma es una roca líquida y semilíquida extremadamente caliente ubicada debajo de la superficie de la Tierra. Este magma puede atravesar agujeros o grietas en la corteza, provocando una erupción volcánica. Cuando el magma fluye o entra en erupción en la superficie de la Tierra, se llama lava. Como la roca sólida, el magma es una mezcla de minerales.

Espero que esto ayude

3 0
3 years ago
If a circle has a diameter of 16 feet, which expression gives its area in square
bagirrra123 [75]

Answer:

The options are unclear but the answer is 8^2π square feet or 64π sqfeet

Explanation:

Area of a circle is denoted by: πr^2 where r is the radius of the circle.

In this question, the diameter was given. The diameter of a circle is twice the radius. Therefore, in order to get the radius, we divide the diameter by 2 i.e. r = d/2

= 16/2 = 8 feet.

Thus, the radius = 8 feet.

Hence, Area of a circle = πr^2

= π × 8^2

= 64π or 8^2π sqfeet.

6 0
3 years ago
The scientific method helps scientists avoid injecting which of the following into their experiments? a. information b. conclusi
Crank
<span>The scientific community ensure that all work done and shared is purely objective and based on solid facts and complete experimental procedure. Therefore, the scientific method is adopted to avoid bias in experiments. A bias would cause results to be skewed to fit the researchers' personal views, making the finding unreliable.</span>
6 0
3 years ago
Read 2 more answers
What is the restoring force in propagation of air particles?
alexandr402 [8]

Answer:

Restoring force is a force which acts to bring a body to its equilibrium position. The restoring force is a function only of position of the mass or particle, and it is always directed back toward the equilibrium position. Therefore the restoring force of air particles should be displaced in the direction of the force and according to Newton 3rd law of motion, once the force is removed, restoring force of elasticity returns the displaced particle to a resting state .

6 0
3 years ago
Read 2 more answers
What is the value of y<br>​
SVETLANKA909090 [29]
Is there suppose to be a picture??
5 0
4 years ago
Read 2 more answers
Other questions:
  • Choose all the answers that apply.
    14·2 answers
  • James observes an orbiting body that is approximately 5.2 AU away from the Sun. He knows that it is primarily composed of helium
    13·2 answers
  • 1. The ideal osmotic environment for an animal cell is a(n) environment. 2. An animal cell placed in a(n) solution will gain wat
    15·1 answer
  • What is the smallest unit of life in the human body?
    9·2 answers
  • Which statement is true about white light?
    9·1 answer
  • Which type of contraction causes a skeletal muscle to shorten?
    15·1 answer
  • What is the best definition of mutation
    6·2 answers
  • Help me please,thanks
    14·1 answer
  • If an atom loses a neutron, what happens to the overall
    10·1 answer
  • How are proteins and nerve cells interrelated?​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!