MSBSHSE Class 9 solutions of Social Science Geography Chapter 5 cover all the important questions from the exam point of view. With the help of these solutions, students can upgrade their thinking and analytical skills. Students should add these MSBSHSE Class 9 solutions of Geography in their study material checklist. By doing so, they can grasp the difficult concept easily.
MSBSHSE Class 9 Social Science Geography Chapter 5 Objective Questions: Textbook Important Questions and Solutions
MSBSHSE Class 9 Social Science Geography Chapter 5 Textbook Exercise Questions
Q1 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.
Answer b: Fog
Answer c: Frost
Answer d: Snowfall
Q2 Look at the following pictures and identify the correct rainfall type.
Answer A: Convectional Rainfall.
Answer B: Orographic Rainfall.
Answer C: Cyclonic rainfall.
Q 3. Look at the figures above and answer the following questions:
(1) In figure B, on which side of the mountain is it raining more?
(2) Shade the rain shadow region in figure B and name it.
(3) What is the difference between A and C?
(4) Stormy winds and floods are associated with which rainfall type?
(5) What type of rainfall occurs in Singapore?
Answer 1: From the given figure it is understood that it is raining more on the right side of the mountain.
Answer 3: Figure A shows Convectional Rainfall whereas the Figure C shows Cyclonic rainfall.
Answer 4: Cyclonic rainfall are associated with Stormy winds and floods.
Answer 5: Singapore experiences Convectional rainfall.
Q 4. Identify the odd man out:
(1) Orographic rainfall, acid rain, cyclonic rainfall, convectional rainfall
(2) Snowfall, rainfall, hailstones, dew
(3) Thermometer, rain gauge, anemometer, measuring jar.
Answer 1: Convectional rainfall is the odd man out.
Answer 2: Dew is the odd man out.
Answer 3: Measuring Jar is odd man out.
Q 5. Answer in brief:
(1) In what ways does precipitation occur on the earth?
(2) Comment on the rainfall occurring in the rain shadow area.
(3) Which type of rainfall occurs in most of the world? Why?
(4) If condensation occurs closer to the earth’s surface, what types of forms become visible?
(5) What precautions should be taken while measuring rainfall?
Answer 1: Precipitation is any type of water that forms in the Earth’s atmosphere and then drops onto the surface of the Earth. When a portion of the atmosphere becomes saturated with water vapor, it condenses and precipitates. Most common forms of precipitation are rain, snow, drizzle, hail, etc.
Answer 2: A rain shadow is a dry area on the leeward side of a mountainous area. The mountains block the passage of rain-producing weather systems and cast a shadow of dryness behind them. The air, without much moisture left, advances across the mountains creating a drier side called the rain shadow.
Answer 3: Orographic rainfall occurs in most of the world:
- Orographic rainfall occurs because of the obstruction of moisture laden clouds by the mountains and areas of high altitudes. These clouds are generally blown by the winds.
- Convectional rainfall occurs when the heated air from the earth’s surface rises upwards along with the water vapour and gets condensed when it reaches a higher altitude. Here the clouds carrying the water vapour are not carried away by the wind and hence, it rains in the same place. Due to this, convectional rainfall is limited to the equatorial calm belt.
- Cyclonic rainfall occurs only in places which get affected by cyclones.
- Thus, the conditions for the occurrence of the orographic rainfall are higher and hence orographic rainfall occurs in most parts of the world.
Answer 4: The types of forms that become visible are:
- When condensation occurs closer to the earth’s surface, then we can see fog, dew or frost.
- As the temperature of the layers of the air near the surface of the earth reduces, water vapour condenses. It turns into very small water particles and floats in the air. When the density of these droplets in the air increases, fog occurs.
- When moisture-laden air near the earth’s surface comes in contact with very cold objects, condensation of the vapour takes place and it turns into very small water droplets. These water droplets stick to the surface of the cold objects and form dew.
- If the temperature of the air reaches below 00C, the dew freezes. This frozen water droplets are called frost.
Answer 5: The following precautions should be taken while measuring the rainfall.
- Don’t let the rainwater runoff.
- Don’t let the rainwater penetrate in the ground
- Don’t let the rainwater evaporate.
Q 6. Distinguish between
(1) Dew and frost
(2) Snow and hail
Answer 1: Difference between dew and frost are:
- Dew occurs because of the condensation of moisture-laden air or vapour, coming in contact with the surface of the cold objects. Frost occurs because of freezing of the water droplets, present in contact with the surface of the cold objects.
- When the temperature of the layers of the air near the earth’s surface reduces, dew is formed. When the temperature of the air reaches less than 0 C, formation of frost begins.
- Dew is basically water droplets in liquid form. Frost is basically water droplets in frozen form.
Answer 2: Difference between snow and hail are:
- Precipitation in the form of friable and solid particles is known as snowfall. Precipitation in the form of frozen water droplets falling rapidly to the ground because of gravity is called hail.
- The fall of temperature in the atmosphere below the freezing point causes snowfall. Extreme heat on the surface of earth can initiate the process of formation of hailstones.
- Snow forms due to solidification of water vapour due to low atmospheric temperature. Hailstones form due to condensation of the water droplets at higher altitudes.
- Accumulation of snow causes disruption of transport and communication services and also causes frostbite to the people living in those regions. Hailstones can destroy the crops and also lead to loss of life and property.