SAQ for Chapter 2 Understanding the Weather Class 7 Social Science NCERT
Important Questions1
Q1: Why is it important to predict weather accurately?
Answer
Accurate weather predictions help us prepare for natural events like storms, droughts, and heatwaves. They protect lives and property and help various professions plan better.
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2
Q2: How does weather influence the daily life of people?
Answer
Weather affects the clothes we wear, the food we eat, and even the activities we do. For example, people wear warm clothes in winter and cool clothes in summer.
Weather and Seasons
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3
Q3: What role do meteorologists play in predicting weather?
Answer
Meteorologists collect data from weather instruments and use scientific methods to forecast weather. Their predictions help in disaster preparedness and planning.
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4
Q4: Why is the troposphere important in understanding weather?
Answer
The troposphere is where all weather changes occur, including rain, wind, and snow. It contains the air we breathe and supports life on Earth.
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5
Q5: How do high altitudes affect atmospheric pressure and human health?
Answer
At high altitudes, air pressure is lower and oxygen is thinner, causing breathlessness. This makes it harder for people like mountaineers or soldiers to breathe easily.
SAQ
6
Q6: What is the use of a digital thermometer in weather measurement?
Answer
Digital thermometers give precise temperature readings and can store data. They help scientists track temperature changes accurately throughout the day.
Clinical Thermometer
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7
Q7: How do changes in air pressure lead to storms or cyclones?
Answer
Low air pressure can form a depression, which leads to stormy conditions or cyclones. These systems bring strong winds and heavy rainfall.
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8
Q8: What are some signs in nature that help predict weather?
Answer
Animals and plants show signs like birds flying low or pine cones closing, which can indicate rain. These traditional signs are still used, especially in rural India.
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9
Q9: What is the role of an Automated Weather Station (AWS)?
Answer
An AWS uses sensors to automatically measure weather elements like temperature, humidity, and pressure. It provides timely and accurate weather data without human involvement.
AWS at Sikkim
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10
Q10: Why does high humidity make us feel uncomfortable?
Answer
High humidity reduces the evaporation of sweat, making us feel hotter and sweatier. It also makes clothes dry slower and causes stickiness.
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11
Q11: How does weather forecasting help farmers?
Answer
Farmers use weather forecasts to decide when to plant or harvest crops. Knowing about rainfall or heatwaves in advance helps protect their fields and animals.
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12
Q12: What is the meaning behind IMD’s motto “From the sun arises rain”?
Answer
The motto explains that heat from the sun causes water to evaporate and form rain clouds. It highlights the sun’s role in driving the water cycle.
IMD
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13
Q13: Why are weather predictions important?
Answer
Weather predictions help people prepare for natural events like storms, droughts, or heat waves and ensure safety in fields like farming, aviation, and disaster management.
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14
Q14: What does an anemometer do and how does it work?
Answer
An anemometer measures wind speed using rotating cups—the faster they spin, the stronger the wind.
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15
Q15: How does atmospheric pressure affect mountaineers?
Answer
At high altitudes, pressure drops and oxygen becomes scarce, causing breathlessness for mountaineers and soldiers.
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16
Q16: What is the role of AWS in weather monitoring?
Answer
An Automated Weather Station records weather data using sensors without human help, providing accurate information for forecasting and agriculture.
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17
Q17: How is humidity measured and why is it important?
Answer
Humidity is measured with a hygrometer and is vital in weather forecasting, preserving materials in museums, and in industries.
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