4. Which type of cloud is lens shaped and occurs near mountain ranges? a. Lentic

Question

4. Which type of cloud is lens shaped and occurs near mountain ranges? a. Lenticular b. Mammatus c. Contrail 5. What type of fog forms when a moist air mass moves over a cold surface? a. Advection fog b. Radiation fog c. Steam fog Which atmospheric lifting mechanisms occurs when a warm air parcel rises because it is less dense than the surrounding air parcels? a. Frontal wedging Convection C. Topographic lift What will happen to an air parcel that is mechanically lifted in a stable atmosphere? a. It will continue to rise on its own. b. It will sink back to its original position. c. It will remain at the height it was mechanically lifted to.

Explanation / Answer

4] option a is correct

Lenticular clouds known as altocumulus standing lenticularis, are stationary lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction.

5] option a is correct

Advection Fog  forms when quite warm, moist and stable air is blown across a cooler surface (land or water). The air temperature falls until the dew point is reached and condensation occurs.

6] option b is correct

As the surface of the earth heats up due to incoming solar radiation, warm bubbles of air (thermals) develop and begin to rise. When these thermals reach a height known as the condensation level, cumulus clouds begin to form. Cooler air surrounding the clouds sinks to replace the warm air rising from the surface. The subsidence outside of the cumulus clouds suppresses cloud formation in the area surrounding the cloud. Eventually, a growing cumulus cloud cuts off the ground from the sun's rays, reducing surface heating and convection.

7] option b is correct

If the air parcel's temperature is less than the temperature of the surrounding air mass, it is denser than the surrounding air and therefore has a tendency to sink. Air that has a tendency to sink is known as a stable air.

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