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.
Answer:
- A cavern is a cave formed under the Earth when limestone dissolves.
- A sinkhole is a depression that forms when rain dissolves limestone.
- Seismic refers to the movement of the Earth's tectonic plates.
- A tsunami is a large wave that is caused by tectonic plate shifting.
Explanation:
Both caverns and sinkholes are common features in a landscape known as a karst environment. The principal rocky component of karst areas is limestone, a rock easily eroded. In addition to vast caverns and sinkholes, underground rivers can also be present in karst landscapes.
<span>The population of developing nations is increasing at a rate faster than developed nations.One of the reasons for this is due to religious and beliefs. Religious and cultural beliefs in developing countries do not encourage abortion, hence increased in the number of children.</span>
The Senate rejected the Treaty of Versailles based primarily on objections to the League of Nations. The U.S. would never endorse the treaty or join the League of Nations. The U.S senators, headed by Senate Majority Leader Henry Cabot Lodge, opposed the treaty because they felt the U.S was giving up too much power under the League of Nations.
The principle of original horizontality
I’m sure it’s correct