<em>air moves because of two reasons..
1 temperature difference
2 pressure difference
<u>1 temperature difference :
</u> when there is temperature difference in the atmosphere ,,hot air rises and cold air takes its place ... so movement of air occurs..
<u>2 pressure difference:
</u><u /> also when there is pressure difference in atmosphere ,, air moves away from the area where there is more pressure..
<u>if there is no temperature and pressure difference then air will not move...
</u>
</em>
Answer:
A. In polar ice caps
Explanation:
In ice caps and glaciers, over 68% of the earth's fresh water is found, and in groundwater, it is found only more than 30%. In the surface water of lakes, streams and swamps, we consider only about 0,3% of our fresh water.
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Answer:
A human community with high population density and low economic status will have the highest birthrates.
Explanation:
A is not correct because usually, these are populations in countries that are transitioning from one political to another political model, and these populations actually tend to decline, mostly because of immigration.
B is not correct because such populations tend to have low birthrates, often even below the bar for simple replacement of the population.
C is not correct because such populations tend to live in very bad conditions, so despite having relatively high birthrates, they stagnate in their growth.
D is correct because such populations have both the numbers needed and also live in more traditional societies, leading to very high birthrates, as can be seen with Nigeria, Ethiopia, Pakistan, Indonesia, etc.
Answer:
Wind erosion is a natural process that moves soil from one location to another by wind power. It can cause significant economic and environmental damage. Wind erosion can be caused by a light wind that rolls soil particles along the surface through to a strong wind that lifts a large volume of soil particles into the air to create dust storms.
Explanation:
Oceanic crust is more dense which makes it subduct and continental crust is less dense which makes it override the oceanic crust during subduction
