B. Answer the following questions in detail :
1. Describe different forms of precipitation.
2. Describe the following:
(a) Dew (b) Frost
3. Give a detailed account of various types of rainfall.
4. Explain the factors that influence the amount of rainfall received at a place
5. Explain frontal rainfall.
Answers
Answer:
Ans 1
The different types of precipitation are:
Rain. Most commonly observed, drops larger than drizzle (0.02 inch / 0.5 mm or more) are considered rain. ...
Drizzle. Fairly uniform precipitation composed exclusively of fine drops very close together. ...
Ice Pellets (Sleet) ...
Hail. ...
Small Hail (Snow Pellets) ...
Snow. ...
Snow Grains. ...
Ice Crystals.
Ans 2
A bit
Dew is the result of water changing from a vapor to a liquid. Dew forms as temperatures drop and objects cool down. ... This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew
B bit
Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above-freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor (a gas) to ice (a solid) as the water vapor reaches the freezing point.
Ans 3
There are three main types of rainfall and they are relief, conventional and frontal rainfalls. Relief rainfall occurs when hot and humid air is blown from the sea to the land where rainfall occurs. Frontal rainfall takes place when warm air rises above the cold air and cause rain.
Ans 4
Factors controlling the distribution of rainfall over the earth's surface are the belts of converging-ascending air flow (see doldrums; polar front), air temperature, moisture-bearing winds, ocean currents, distance inland from the coast, and mountain ranges.
Ans 5
Frontal rainfall occurs when a warm front meets a cold front. The heavier cold air sinks to the ground and the warm air rises above it. When the warm air rises, it cools. The cooler air condenses and form clouds. The clouds bring heavy rain.
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Answer:
1. Rain-
Most commonly observed, drops larger than drizzle are considered rain. However, smaller drops are also considered raindrops if, in contrast to drizzle, they are widely separated.
Drizzle-
Fairly uniform precipitation composed exclusively of fine drops very close together. Drizzle appears to float while following air currents, but unlike fog droplets, it falls to the ground. Quite often fog and drizzle occur together.
Ice Pellets (Sleet)-
Precipitation of transparent or translucent pellets of ice, which are round or irregular hard grains of ice consisting of frozen raindrops, or largely melted then refrozen snowflakes.
Hail-
Precipitation in the form of small balls or other pieces of ice falling separately or frozen together in irregular lumps. Associated with thunderstorms, individual hail stones are ¼ inch (5 mm) or greater in diameter. Hail sizes of 1 inch (2.5 cm) or more are indicative of severe thunderstorms.
Small Hail (Snow Pellets)-
Precipitation of white, opaque grains of ice that are round or sometimes conical. Diameters are less than ¼ inch (5 mm).
Snow-
Precipitation of snow crystals that are mostly branched and in the form of six-pointed stars.
Snow Grains-
Precipitation of very small, white, and opaque grains of ice. Basically, this is frozen drizzle.
Ice Crystals-
Generally occurring in very cold regions, they are falling crystals of ice in the form of needles, columns, or plates. Also called 'diamond dust', ice crystals appear like fog with individual water particles forming directly as ice. The shape of the individual ice crystals causes the 'light pillar' optical effect above the light source.
2.(a)Dew is the moisture that forms as a result of condensation. ... This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew. The temperature at which dew forms is called the dew point.
(b)Frost is water vapor, or water in gas form, that becomes solid. ... Frost usually forms on objects like cars, windows, and plants that are outside in air that is saturated, or filled, with moisture.
3.There are three main types of rainfall and they are relief, conventional and frontal rainfalls.
Relief rainfall occurs when hot and humid air is blown from the sea to the land where rainfall occurs.
Frontal rainfall takes place when warm air rises above the cold air and cause rain.
Conventional rainfall occurs in hot tropical climate.
4.Factors controlling the distribution of rainfall over the earth's surface are the belts of converging-ascending air flow (see doldrums; polar front), air temperature, moisture-bearing winds, ocean currents, distance inland from the coast, and mountain ranges.
5.Frontal rainfall occurs when a warm front meets a cold front. The heavier cold air sinks to the ground and the warm air rises above it. When the warm air rises, it cools. The cooler air condenses and form clouds. The clouds bring heavy rain.
Explanation:
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