What should be present in air for dew formation?
Answer and explanation
Correct answer: Water vapour
Dew forms when water vapour present in the air condenses into tiny water droplets on a cool surface, usually at night. Therefore, water vapour is essential. Dust particles may help condensation in clouds, but the key requirement for dew is moisture in the air and cooling of the surface to the dew point. Exam tip: remember that dew is condensation of water vapour on a surface.
Frequently asked questions
What is the correct answer to this question?
Water vapour
Why is this the correct answer?
Dew forms when water vapour present in the air condenses into tiny water droplets on a cool surface, usually at night. Therefore, water vapour is essential. Dust particles may help condensation in clouds, but the key requirement for dew is moisture in the air and cooling of the surface to the dew point. Exam tip: remember that dew is condensation of water vapour on a surface.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Forms of condensation: dew, frost, fog, and mist.
