Answer: They are directly caused by the gravitational pull of the Sun.
Explanation:
Water waves are caused by a whole number of factors, they include,
1.) Local winds
2.) Distant wind
3.) Air pressure
4.) Seismic sea wave
The gravitational pull of the sun and moon on the earth also causes waves. Although the sun's gravity also contributes to the waves, but its effects are smaller and serve mostly to vary the heights of high and low tide.
Answer:
The original boundary between the states of Nebraska and Iowa was the Missouri River. The border departs from the river channel because the river's course moved eastward many years after the boundaries were established.
Explanation:
The boundary between Nebraska and Iowa was the Missouri River. In 1877, the river course moved, and a town called Carter Lake on the Iowa side is now on the Alaska side. Even though Alaska claimed the land, the Supreme Court stated that the area belongs to the state of Iowa. That is why the boundary departs from the river channel.
Over the past 50 years, six Nile Basin countries have built 25 hydroelectric dams.
Answer:
Savanna is grassland with scattered individual trees.
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Explanation:
Savannas of one sort or another cover almost half the surface of Africa (about five million square miles, generally central Africa) and large areas of Australia, South America, and India. Climate is the most important factor in creating a savanna.
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.
