Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 5 Precipitation Notes, Textbook Exercise Important Questions and Answers.
Class 9 Geography Chapter 5 Precipitation Textbook Questions and Answers
1. Identify the precipitation type with the help of the description given:
(a) It is the main source of the water that you use. Sometimes it is torrential and sometimes continuous. Most of the agriculture in India is dependent on it.
(b) It seems as if water droplets are floating in the atmosphere. In London, one cannot see the Sun till the afternoon during winters because of this phenomenon.
(c) It never precipitates like this in equatorial areas. Precipitation in the solid form sometimes causes damage to the crops.
(d) A white cotton-like layer spreads on the earth’s surface. Because of this form of precipitation, the State of Jammu and Kashmir has to change its capital in winters. In Maharashtra, it does not precipitate like this.
Answer:
(a) rainfall
(b) fog
(c) hail
(d) snow
2. Look at the following pictures and identify the correct rainfall type.
Answer:
Convectional rainfall
Answer:
Orographic rainfall
Answer:
Cyclonic rainfall
3. Look at the figures above and answer the following questions:
Question 1.
In fig B, on which side of the mountain is it raining more?
Answer:
The windward side is receiving more rainfall.
Question 2.
Shade the rain shadow region in fig B and name it.
Answer:
Students to show the leeward side in the picture.
Question 3.
What is the difference between A and C?
Answer:
In figure 5.4 i.e. convectional rainfall the hot air rises upwards and then the air cools and begins to condense and due to continuous condensation rainfall occurs. Here rainfall is accompanied by lightning and thunder.
In figure 5.6 , i.e. cyclonic rainfall, air from surrounding regions comes towards the centre of the cyclone and starts moving upwards. As it rises, the temperature of the air reduces, condensation occurs and rainfall takes place.
Question 4.
Stormy winds and floods are associated with which rainfall type?
Answer:
Stormy winds and floods are associated with Cyclonic rainfall.
Question 5.
What type of rainfall occurs in Singapore?
Answer:
Cyclonic rainfall occurs in Singapore.
4. Identify the odd man out:
Question 1.
Orographic rainfall, acid rain, cyclonic rainfall, convectional rainfall
Answer:
Acid rain
Question 2.
Snowfall, rainfall, hailstones, dew
Answer:
Dew
Question 3.
Thermometer, rain gauge, anemometer, measuring jar
Answer:
Measuring jar
5. Answer in brief:
Question 1.
In what ways does precipitation occur on the earth?
Answer:
Precipitation means water falls in the solid or liquid state from the clouds to the earth surface. Snow, hailstorms, rainfall are the major forms of precipitation.
(i) Snow:
Answer:
(ii) Hail:
(iii) Rainfall:
(iv) Fog, dew and frost:
Question 2.
Comment on the rainfall occurring in the rain shadow area.
Answer:
Question 3.
Which type of rainfall occurs in most of the world? Why?
Answer:
Question 4.
If condensation occurs closer to the earth’s surface, what types of forms become visible?
Answer:
If condensation and solidification of the water vapour in the atmosphere closer to the earth surface are visible, they are in the form of fog, dew or frost.
(i) Fog:
(ii) Dew:
(iii) Frost:
Question 5.
What precautions should be taken while measuring rainfall?
Answer:
6. Distinguish between
Question 1.
Dew and frost
Answer:
| Dew | Frost | ||
| (i) | When moisture-laden air near the earth’s surface comes into contact with very cold objects, condensation of vapour takes place into small water droplets called dew. | (i) | If the temperature of the air is less then CPC, the water droplets stuck to the surface of cold objects, freezes forming frost. |
| (ii) | Water vapour condenses and forms droplets of water. | (ii) | Water droplets stuck to cold surface turns to frozen water droplets. |
| (iii) | Dew sticks to the cold object but does not freeze. | (iii) | It sticks to the cold object and freeze. |
Question 2.
Snow and hail
Answer:
| Snow | Hail | ||
| (i) | Precipitation in the form of solid particles of snow is known as snow fall. | (i) | Precipitation in the form of frozen water droplets falling rapidly to the ground is know as hail. |
| (ii) | The fall of temperature in the atmosphere below the freezing point causes snow fall | (ii) | Extreme heat on the surface of the earth initiates the process of hail formation. |
| (iii) | Heavy accumulation of snow can collapse the transportation and communication system of the area. | (iii) | It destroys crops and causes loss of life an |
Class 9 Geography Chapter 5 Precipitation Intext Questions and Answers
Can you tell?
Question 1.
The blade of grass look like this in winter mornings. From where does the water on the blades of grass come?
Answer:
Question 2.
Snow is found everywhere in the winters in Kashmir.
Answer:
Snow is found everywhere in winters of Kashmir because Kashmir is located at a higher altitude where the temperature falls below freezing point. Hence water vapour directly turn into snowflakes leading to snowfall.
Question 3.
Why isn’t snow found in our surroundings?
Answer:
Because we have a moderate temperature and we are closer to the sea, snow is not found in our surroundings.
Question 4.
Generally, it rains between June and September in our region.
Answer:
We get rainfall between June and September, in our region when the moisture-laden south-west monsoon winds are obstructed by the Western Ghats leading to orographic rainfall.
Question 5.
How do the rain droplets form?
Answer:
Clouds form when condensed water droplets and dust particles accumulate forming large rain droplets.
Question 6.
In London, there is a fog like this till the afternoon in the winters.
Answer:
In London there is fog till the afternoon in winters because London is far away from equator and it has temperate oceanic climate and they have cool summers.
Question 7.
We do not have fog until afternoons in summers.
Answer:
We do not have fog until afternoons in summer because we are near to equator and we have tropical climate and hot summers.
Question 8.
Sometimes hailstones destroy the standing crops in the field.
Answer:
Hailstones are solid and heavy in nature and they hit the earth due to gravity and this is the reason they destroy the crops in the field.
Question 9.
Why don’t we get hailstones frequently?
Answer:
For the formation of hailstones the following 2 conditions are required:
Think about it.
Question 1.
We use a raincoat or umbrella to protect ourselves from rainfall. What will you use to protect yourself from severe hailstorms?
Answer:
If a person is outside without any coverage, he needs to seek shelter immediately, making sure to protect his head from hailstones.
Question 2.
Because of the conventional processes, convectional rainfall occurs in the afternoon in equational areas. But why doesn’t it rain in afternoons in the oceanic areas of the equatorial belt?
Answer:
One of the necessary conditions of convectional rainfall is intense heating of surface which causes air to expand and rise. Since land heats up faster than water, it rains only on the land in the equatorial regions and not in the oceanic areas.
Question 3.
Why are the areas of high rainfall situated in tropical areas?
Answer:
Class 9 Geography Chapter 5 Precipitation Additional Important Questions and Answers
Complete the statements choosing the correct option from the bracket:
Question 1.
……………. part of the earth’s surface is full of water.
(a) 30.7%
(b) 4.09%
(c) 60.5%
(d) 70.8%
Answer:
(d) 70.8%
Question 2.
When the temperature in the atmosphere falls below the freezing point and the water vapour directly turns into snowflakes, the process is called as ……………..
(a) sublimation2
(b) frostbite3
(c) carbonation
(d) convection
Answer:
(a) sublimation
Question 3.
In areas located at higher altitudes and high latitudes, where the temperatures are below 0°C get precipitation in the form of ………….
(a) dew
(b) rain
(c) snow
(d) hail
Answer:
(c) snow
Question 4.
Because of ………………. crops may get destroyed and loss of life and property may occur.
(a) dew
(b) rain
(c) snow
(d) hail
Answer:
(d) hail
Question 5.
Hails do not occur in ……………… areas.
(a) temperate
(b) equatorial
(c) landlocked
(d) mountainous
Answer:
(b) equatorial
Question 6.
In equatorial areas, …………. type of rainfall occurs almost daily in the afternoons.
(a) frontal
(b) convectional
(c) cyclonic
(d) orographic
Answer:
(b) convectional
Question 7.
…………… rainfall occurs because of obstruction from high mountain ranges.
(a) Frontal
(b) Convectional
(c) Cyclonic
(d) Orographic
Answer:
(d) orographic
Question 8.
Cyclonic rainfall occurs more in …………… zones.
(a) temperate
(b) equatorial
(c) torrid
(d) polar
Answer:
(a) temperate
Question 9.
…………… rainfall occurs in most of the parts in the world.
(a) Frontal
(b) Convectional
(c) Orographic
(d) Cyclonic
Answer:
(c) orographic
Question 10.
Snowfall can also be measured with the help of ……………
(a) hygrometer
(b) rain gauge
(c) barometer
(d) anemometer
Answer:
(b) rain gauge
Question 11.
A layer of ice is equivalent to 10mm of rainfall.
(a) 10mm
(b) 50mm
(c) 100mm
(c) 120mm
Answer:
(c) 120mm
Question 12.
When moisture-laden air near the earth’s surface comes in contact of very cold objects and form water droplets which stick to the surface of the cold objects is formed.
(a) dew
(b) frost
(c) hail
(d) fog
Answer:
(a) dew
Question 13.
If the temperature of the air reaches less than 0°C, the water droplets stuck to the surfaces of cold objects freeze and form
(a) dew
(b) frost
(c) hail
(d) fog
Answer:
(b) frost
Question 14.
If precipitation does not take place, then conditions of arise.
(a) floods
(b) hail
(c) snowstorm
(d) drought
Answer:
(d) drought
Question 15.
Visibility reduces because of
(a) floods
(b) drought
(c) fog
(d) dew
Answer:
(c) fog
Match the column:
Question 1.
| Column A | Column B |
| (1) Snowflakes | (a) upward air flow |
| (2) Hailstones | (b) sublimation |
| (3) Dew | (c) microscopic water particles floating in the air |
| (4) Fog | (d) condensation4 on cold objects |
Answer:
(1 – b),
(2 – a),
(3 – d),
(4 – c)
Question 2.
| Column A | Column B |
| (1) Orographic rainfall (2) Convectional Rainfall (3) Cyclonic Rainfall |
(a) Daily in equatorial areas (b) More in temperate zones (c) Mountain barrier |
Answer:
(1 – c),
(2 – a),
(3 – b)
Answer in one sentence:
Question 1.
What percentage of the earth’s surface is covered with water?
Answer:
70.8% of the earth’s surface is covered with water.
Question 2.
Why do we see different forms of condensation?
Answer:
Different forms of condensation are seen due to changes in atmospheric conditions.
Question 3.
What is precipitation?
Answer:
When water falls in the solid or liquid state from the clouds to the ground, it is called as precipitation.
Question 4.
Name the major forms of precipitation.
Answer:
Snow, hailstones and rainfall are the major forms of precipitation.
Question 5.
Explain the process of sublimation.
Answer:
When the temperature in the atmosphere falls below the freezing point, water vapour directly turns into snowflakes this process is called sublimation.
Question 6.
In India, hails occur in which season?
Answer:
Hails occur in summer reason in India.
Question 7.
Why don’t hails occur in cold zones?
Answer:
Hails do not occur in cold zones because of lack of upward flow.
Question 8.
Why don’t hails occur in equatorial areas?
Answer:
Hails do not occur in equatorial areas because of the heat in the atmosphere.
Question 9.
Which type of rainfall occurs because of obstruction of mountain?
Answer:
Orographic rainfall occurs because of obstruction of mountains.
Question 10.
Convectional rainfall is mainly experienced in which region?
Answer:
Convectional rainfall is mainly experienced in equatorial region.
Question 11.
What is a Cyclone?
Answer:
Cyclone is a specific air formation when the pressure at an area is less than the surrounding regions.
Question 12.
What is acid rain?
Answer:
Precipitation of water with dissolved acids is called acid rain.
Study the rainfall map of the world given below and answer the following question:
Question 1.
Which region experiences more rainfall?
Answer:
The tropical region experiences more rainfall.
Question 2.
What is the reason for low rainfall in the Central Peninsular India?
Answer:
The Central Peninsular India falls on the leeward side of the Western Ghats and hence a rain shadow region is formed here.
Question 3.
Why does the eastern part of Central African continent gets less rainfall than the western part despite its location close to the equator?
Answer:
Question 4.
Why does the amount of high rainfall in the western part of the European continent reduce in the eastern part?
Answer:
There are many mountain ranges in the western part of Europe. These obstruct the rain-bearing clouds coming from the west and therefore the amount of rainfall received is high in the west and it reduces towards the east.
Question 5.
Why is rainfall more only in the eastern coast of Australia?
Answer:
The eastern part of Australia is a mountainous region. The winds blowing from the Pacific Ocean are obstructed by these mountains resulting in orographic rainfall towards the east and the formation of a rain shadow zone towards the west.
Observe the horizontal profile of Maharashtra in the following figure and answer the following questions:
Question 1.
What type of rainfall occurs in Maharashtra?
Answer:
Orographic rainfall occurs in Maharashtra.
Question 2.
Where will the rain shadow area lie in Maharashtra?
Answer:
The rain shadow area lies to the Leeward side of Sahyadri hills (Maharashtra plateau).
Question 3.
Think about the figure and estimate the rainfall of your district.
Answer:
The answer may vary.
Give reasons:
Question 1.
Crops may get destroyed due to hailstones.
Answer:
Question 2.
There is a difference between ice and snow.
Answer:
Thus, there is a difference between ice and snow.
Question 3.
In equatorial areas, convectional rainfall occurs almost daily in the afternoons.
Answer:
Question 4.
A rain shadow area is formed on the leeward side of the Western Ghats.
Answer:
Question 5.
Snowfall is not experienced in Maharashtra.
Answer:
Question 6.
Hailstones do not occur frequently.
Answer:
Question 7.
Dew and frost occur on a large scale in winters.
Answer:
Draw diagram of Rain Gauge:
Answer:
Question 6.
Explain the effects of precipitation.
Answer:
Explain:
Question 1.
Snowfall
Answer:
Question 2.
Formation of hailstones.
Answer:
Question 3.
Cyclonic rainfall
Answer:
Question 4.
Rain Gauge.
Answer:
Question 5
Fog, dew and frost
Answer:
(i) Fog:
(ii) Dew:
(iii) Frost:
Question 6.
Acid Rain
Answer:
Question 7.
Convectional Rainfall
Answer:
Question 8.
Orographic rainfall
Answer: