Answer:
The continental margin is one of the three major zones of the ocean floor, the other two being deep-ocean basins and mid-ocean ridges. The continental margin is the shallow water area found in proximity to continent. ... It is generally flat, and ends at the shelf break, where there is a drastic increase in slope angle.
Explanation:
The physical systems of the earth include the lithosphere, the hydrosphere, the atmosphere and the biosphere.
The hydrosphere consists of the earth's water. Approximately 70% of the earth's surface is water. It is found in oceans, lakes, rivers ponds, ice and ground water.
The Lithosphere consists of the solid surface that covers the Earth. Features such as hills, mountains, plateaus, plains and ocean basins are land forms covering the lithosphere.
The atmosphere consists of the thin layer of gases that surround the earth and rises up to 100 miles from the earth's surface, beyond which is outer space.
The biosphere consists of all things living on the surface of the earth and includes animals and plants.
Answer:
D. Pollution
Explanation:
The pollution is a consequence of the growing economy in advancing nations. The economy is growing, and transforming rapidly in the last two decades. Some characteristics of this change are: technological innovations and modernization, competition in the global market, etc. However, the pollution still a severe problem in developing countries. This is because, these countries doesn´t have a substantial economic growth, therefore cannot afford to focus on environmental problems.
Developing countries need to decide between keeping competitive prices to obtain and sustain economic growth while the poverty decrease. This decisions usually lead to environmental pollution. For example In sub-Saharan Africa, depends mainly on natural resources. They over exploits of natural resources such as coal, oil and gas, gold, copper. This cause pollution in air, water and land, and it can impact the climate change.
They should care more about pollution, because it also affects the health, sometimes leads to death of the population. Is important to mention that per year millions of people can be affected.
Answer:
The main reason why mountains are rarely populated is because of the harsh climate that are dominating in those areas. On the other side, another important reason is that mountainous areas are not fertile enough and people are not able to grow crops. Lack of resources therefore is obliging people to move from the mountains to lower terrains.
Explanation:
Because of the mentioned reasons most of the people since the beginning of civilization were inhabiting river valleys and the areas that have better climate.
For example, Chinese civilization developed in the valley of Yangtze and Huang He and not Himalayas.
