Understanding the Weather – Question & Answer Worksheet

CLASS:7- CHAPTER-2 -UNDERSTANDING THE WEATHER – QUESTION and ANSWER WORKSHEET

📘 Textbook Questions

Question 1:

Match the instrument with the weather element it measures.

✅ Correct Matching:

• (1) → (d)
• (2) → (c)
• (3) → (b)
• (4) → (e)
• (5) → (a)

Question 2:

Jyotsna is deciding what clothes to pack for her school trip to Mumbai in June. She looks at the weather forecast, which predicts 29°C and 84% humidity. What would be your advice to her?

✅Answer:

Jyotsna should pack light, breathable, and loose cotton clothes to stay cool and comfortable. Since the temperature is warm (29°C) and the humidity is high (84%), she may sweat more, so she should carry a cap, water bottle, and deodorant or wipes to stay fresh.

Note: High humidity makes sweating more likely and slows down evaporation, especially in coastal areas like Mumbai.

Question 3:

Imagine that a small group of students is setting up a rain gauge.
Here are some options for the site:

1. The school vegetable garden.
2. The terrace of the school building.
3. Open ground with elevated platform.
4. Compound wall of school.
5. Verandah of the school laboratory.

Discuss in your group and finalise the site. Write down the reasons for your decision.

✅Answer:

The best site to place the rain gauge is: (3) Open ground with an elevated platform.

Reasons:

• It is in an open area, so no walls, trees, or buildings will obstruct the rain.

• The elevated platform ensures it remains stable and does not collect surface runoff.

The placement follows the guidelines to install the gauge in an open area, away from obstructions, and on a flat surface.

📚 Extra Questions

🔢 Multiple Choice Questions (MCQs)

Q1. What is the name of the atmospheric layer where almost all-weather phenomena occur?
A. Stratosphere
B. Exosphere
C. Troposphere
D. Thermosphere
✅ Answer: C
Explanation: Weather phenomena occur in the troposphere, which is the layer closest to the Earth’s surface.

Q2. Which of the following instruments is used to measure precipitation?
A. Hygrometer
B. Barometer
C. Rain gauge
D. Anemometer
✅ Answer: C
Explanation: A rain gauge is used to collect and measure the amount of rainfall.

Q3. What does a hygrometer measure?
A. Temperature
B. Atmospheric pressure
C. Wind direction
D. Humidity
✅ Answer: D
Explanation: A hygrometer is used to measure the amount of water vapour (humidity) in the air.

Q4. What is the normal atmospheric pressure at sea level?
A. 1013 millibars
B. 1000 millibars
C. 1020 millibars
D. 980 millibars
✅ Answer: A
Explanation: The normal atmospheric pressure at sea level is around 1013 millibars.

Q5. What happens to atmospheric pressure as one goes higher up into the mountains?
A. It increases
B. It remains the same
C. It decreases
D. It becomes unstable
✅ Answer: C
Explanation: Atmospheric pressure decreases with altitude due to thinner air and lower oxygen levels.

Q6. Which instrument measures the direction and speed of wind?
A. Barometer
B. Thermometer
C. Wind vane and Anemometer
D. Hygrometer and Rain gauge
✅ Answer: C
Explanation: A wind vane shows the direction, while an anemometer measures wind speed.

Q7. What does the term “relative humidity” mean?
A. Percentage of total rainfall
B. Comparison of wind speed
C. Amount of water vapour in the air compared to its maximum capacity
D. Change in atmospheric pressure
✅ Answer: C
Explanation: Relative humidity is the percentage of water vapour in the air relative to the maximum it can hold at that temperature.

Q8. Which of the following is a traditional sign of predicting rain in rural India?
A. Bark of trees turning green
B. Ants shifting their eggs to higher ground
C. Increase in wind pressure
D. Sudden heat rise
✅ Answer: B
Explanation: Observing ants carrying eggs to higher ground is a traditional way of predicting rainfall.

Q9. Which department is responsible for weather forecasting in India?
A. Indian Space Research Organisation
B. Indian Climate Bureau
C. India Meteorological Department
D. National Weather Control Board
✅ Answer: C
Explanation: The India Meteorological Department (IMD), established in 1875, is responsible for weather forecasting in India.

Q10. What is the mean daily temperature if the maximum is 32°C and the minimum is 18°C?
A. 14°C
B. 25°C
C. 30°C
D. 50°C
✅ Answer: B
Explanation:
Mean daily temperature = (Maximum temperature + Minimum temperature) ÷ 2

1. Name the automated system that records weather data without human intervention.
   Answer: AWS (Automated Weather Station)
2. Identify the atmospheric layer that contains the ozone layer.
   Answer: Stratosphere
3. State the unit used to measure atmospheric pressure.
   Answer: Millibar
4. Mention the term for a low-pressure weather system that can develop into a cyclone.
   Answer: Depression
5. Give the name of the science used to study and predict weather.
   Answer: Meteorology

🧠 Short Answer Questions

1. Why do people feel breathless at high altitudes?

At high altitudes, the air pressure is lower, so there is less oxygen. As a result, our lungs get less oxygen, making us feel breathless and tired.

2. What is the role of IMD in disaster preparedness?

The India Meteorological Department (IMD) collects weather information and gives early warnings. These alerts help the government take quick steps like evacuations and disaster control.

3. What kind of weather is associated with a ‘loo’ in North India?

Answer: A ‘loo’ refers to strong, hot, and dusty winds that blow in North India during the summer months. It is associated with high temperatures and dry conditions.4. How does high humidity affect the drying of clothes or human sweating?

Answer: In high humidity, the air already contains a lot of water vapour, so evaporation slows down. This causes wet clothes to dry more slowly and increases human sweating without much cooling.

5. Why do museums monitor humidity levels carefully?

Answer: Museums monitor humidity to maintain a dry and controlled environment, which helps preserve

Artefacts, artworks, and documents that could be damaged by moisture.

🌦️ Long Answer Questions

Q1. Describe the five main elements of weather.

Answer:
The five main elements of weather are:

• 🌡️ Temperature – Indicates how hot or cold the atmosphere is
• 🌧️ Precipitation – Includes rain, snow, hail, and sleet
• 📉 Atmospheric Pressure – Weight of air above a given area
• 🌬️ Wind – Movement of air (speed and direction)
• 💧 Humidity – Amount of water vapour in the air

Q2. How did people predict weather using nature?

Answer:

• 🐜 Ants moving eggs to higher ground → rain
• 🐸 Frogs croaking loudly → upcoming rain
• 🌲 Pinecones closing → high humidity
• 🐦 Birds flying low → pressure change

These signs were passed down and are still used in rural areas.

Q3. What is AWS and where is it useful?

Answer:

AWS (Automated Weather Station) is a self-operating system that:

• Records temperature, humidity, wind, pressure, and rainfall
• Uses sensors, no human help
• Useful in remote/high-altitude areas (e.g., Sikkim glacial lake)
• Helps in agriculture, disaster alerts, and navigation

Q4. Why is measuring weather important in our daily lives? Give examples.

Answer:

• Planning: travel, farming, school trips
• Disaster preparedness: floods, cyclones
• Safety: alerts for fishermen and coastal areas
• Government action: evacuation, relief
• Industry use: food processing, museum care

Q5. How is temperature measured and interpreted?

• 🌡️ Measured using thermometers (digital or liquid-based)
• Records maximum and minimum daily
• Formula: Mean Daily Temperature = (Max + Min) ÷ 2
• 📊 Example: Max = 32°C, Min = 18°C → Mean = 25°C, Range = 14°C