D. Answer the questions in about 20-30 words.

1. Define weather. What are the different elements of weather?

Answer: Wheather is the day-to-day or short-term state of the atmosphere at any time. Weather may be hot or cold, wet or dry, calm or stormy, clear or cloudy. Almost all these weather phenomena occur in the lower part of the atmosphere.

The elements of weather are - temperature, atmospheric pressure, rainfall, moisture, wind speed, wind direction, clouds and sunshine.

2. What is the purpose of recording different elements of weather?

Answer: Recording different elements is important as this helps in recording the various phenomena of weather.

3. Define air pressure. Explain the movement of winds.

Answer: The air exerts pressure on us from all directions; our body also exerts a counter pressure. Therefore, we don't feel it. 
We can define air pressure as the pressure exerted by the weight of a column of air on 1 cm sq area on the Earth's surface.

4. How are winds classified according to the Beaufort scale?

Answer: 

5. How are clouds formed?

Answer: Condensation in the atmosphere helps in the formation of water droplets. Water particles take the support of the dust particles to float in the atmosphere. Such water droplets together form clouds. 
According to their height above the ground, appearance from the ground and certain special characteristics; clouds have been classified into the following four main types:
  • Cirrus clouds
  • Cumulus clouds
  • Stratus clouds
  • Nimbus clouds



E. Answer the questions in about 50-60 words.

1. How are weather and climate different from each other? (Coming Soon)

2. How does weather affect our lives? (Coming Soon)

3. What is a barometer? How do we measure air pressure with its help? (Coming Soon)

4. What are the various types of clouds? Explain. (Coming Soon)

5. What are weather maps? How are they useful to us? (Coming Soon)