Class 7 Social Science Chapter 2 Very Short Answer Questions - Understanding the Weather

Q1: What is weather?

Ans: Weather is the condition of the Earth's atmosphere at a specific time and place.

Q2: Which layer of the atmosphere is responsible for all weather changes?

Ans: The troposphere is the layer where all weather changes occur.

Q3: How thick is the troposphere at the poles?

Ans: The troposphere is about 6 kilometers thick at the poles.

Troposphere

Q4: Why do people in different regions experience weather differently?

Ans: People experience weather differently depending on their regional temperature, humidity, rainfall, and seasonal patterns. 

Q5: What type of clothes do people wear in winter?

Ans: People wear warm clothes during winter to protect themselves from the cold.

Q6: How did people in earlier times predict rain using nature?

Ans: People observed signs like clouds, wind direction, and animal behavior to predict rain.

Q7: Which instrument is used to measure temperature?

Ans: A thermometer is the instrument used to measure temperature. It indicates how hot or cold the air is.

Q8: What does a rain gauge measure?

Ans: A rain gauge measures the amount of rainfall in millimeters.

Q9: What does atmospheric pressure mean?

Ans: Atmospheric pressure is the weight of air pressing down on the Earth's surface.

Q10: Where is atmospheric pressure lower: mountains or sea coasts?

Ans: Atmospheric pressure is lower in mountains compared to sea coasts  where air is thinner.

Q11: Which instrument is used to measure atmospheric pressure?

Ans: A barometer is used to measure atmospheric pressure in millibars.

Q12: What causes breathlessness at high altitudes?

Ans: Breathlessness at high altitudes is caused by thin air and low oxygen levels.

Q13: What is the normal atmospheric pressure at sea level?

Ans: The normal atmospheric pressure at sea level is about 1013 millibars.

Q14: What does an anemometer measure?

Ans: An anemometer measures the speed of the wind in kilometers per hour.
Anemometer

Q15: Which instrument tells the direction of the wind?

Ans: A wind vane shows the direction from which the wind is blowing.

Q16: Where is a wind sock commonly used?

Ans: A wind sock is commonly used at airports and industrial areas.

Q17: What is humidity?

Ans: Humidity is the amount of water vapor present in the air.

Q18: Which city has higher humidity, Kochi or Jaipur?

Ans: Kochi has higher humidity compared to Jaipur.

Q19: What happens to evaporation when humidity is high?

Ans: High humidity slows down the rate of evaporation.

Q20: Which instrument is used to measure humidity?

Ans: A hygrometer is used to measure the amount of humidity in the air.

Hygrometer

Q21: What is the range of relative humidity in dry weather?

Ans: Dry weather has a relative humidity between 20% to 40%.

Q22: How is snowfall measured in terms of precipitation?

Ans: Snowfall is measured by melting it first before using a rain gauge for accurate assessment.

Q23: What is the mean daily temperature formula?

Ans: Mean daily temperature is calculated by adding maximum and minimum temperature and dividing the sum by two.

Q24: What is an Automated Weather Station (AWS)?

Ans: An Automated Weather Station is a system that measures weather data using sensors without human help.

Q25: Who is responsible for issuing weather warnings in India?

Ans: The India Meteorological Department (IMD) is responsible for issuing weather warnings in India.