Answer:
It's the 4th, as third is modified by the man.
Explanation:
- The Third atmosphere was a rearrangement of the plate tectonics and the evolution of atmosphere by the transferring of it to the oceanic basins. As the amount of oxygen in the atmosphere used to be more than 30% around 280 million years ago than the present.
- Rapid development of land plants and animals was caused due to this atmosphere and hence this atmosphere is now less than 21% and due to his influence or modification of man with his technological tools and techniques.
- The atmosphere is rapidly shrinking due to the greenhouse effect and global warming that is leading to the fifth atmosphere that may be like that of mars as devoid of gases and barren and dry with oceans running under the crust.
The area of square a is 100
C) Increased access to an area
The answer is C I hope it help
Answer:
Yes, the length of plate widening started from the poles and extends towards the other poles
Explanation:
- As the aspects of spherical geometry, the relative plate motion is affected by the rotation of the earth on its axis and not all are located at the geographic poles. As an example of mid-oceanic ridges that have a spreading value of 37-40 mm/year in southern Atlantic.
- Hene rotation of the poles can be determined by the accuracy an orientation of the mid-Atlantic ridges. Another example is of the African plate is moving to the east and the northern plate is moving to the west as template rotation is anticlockwise and paleomagnetism pole is and evident to this phenomenon.
- Spreading and splitting of the supercontinent like Pangaea created a major displacement in the orient rock and thus led by the rotation of the earth, this phenomenon also called the Euler pole and rotation angle based on the earth's orbit around the sun.
