UNIT REVIEW

Unit review



Unit review



Question # 1 Ans:

The air pressure decreases as there is a increase in altitude because air gets thinner. The air is filled with air molecules, which are more near the earth surface and decreases as the altitude increases. It is harder to breathe in high altitudes due to this reason as oxygen molecules are less in number.

Question # 2 Ans:

The reason why a cold, cry mass produces higher surface pressure than warm humid air mass is because warm air is less dense and lighter and as a result apply less pressure. On the other hand, cold air is heavier and denser, thus exerting high pressure.

Question # 3 Ans:

When air masses toward the Earth's surface to fall apart and finally flow, it is called divergence. To balance their needs air can flow from higher layers, which in turn through there confluent ( converging replaced) air. The sinking air warms up, what its water vapor capacity increases and, consequently, with a resolution of the cloud cover is associated. This process may, among other things in the core of high-pressure areas are observed, so these have also a fair-weather nature.

Question # 4 Ans:

The global winds, constant or planetary , are generated primarily by the movement of Earth's rotation, which causes an uneven heating of the atmosphere by sunlight and action are from the latitudinal bands arranged in high and low pressures, ie anticyclones and depressions . These belts are arranged approximately in the equatorial latitudes, subtropical and polar (Arctic Circle) and take care of delivering a truly enormous amount of power, before which, the possibility of anthropogenic global warming seems to have no value. These winds are called trade winds in the intertropical latitudes and westerly winds in the temperate zones.

Question # 5 Ans:

The isobars are lines whose points are equals pressure. These lines are shown in a horizontal plane and is the best way to represent on paper map name sinotica pressure at sea level. From a card sinotica thanks to the isobars which are usually marked with the initials pmsl (mean sea level pressure) and spaced 4 or 5 hPa, you can locate the position of the great centers of high or low pressure as the anticyclones and cyclones, direction and intensity of the winds, warm and cold fronts, and also the possible movements of the masses of air at sea level. The wind is due to the difference in air pressure, also more isobars (lines of equal pressure) are tightened, the more the wind is strong.

Question # 6 Ans:

The force that is created by the rotation of Earth is known as the Coriolis force. The Coriolis force deflects air to the right in the Northern Hemisphere, which causes it in following a curved path. The total deflection varies, depending on the latitude. At poles, the deflection is the highest, which diminishs to zero at the equator. The magnitude of Coriolis force also varies with the speed of the ...