What is a dewpoint? What is the significance of the dewpoint?

How to fly Learning to fly Private pilot training videos Private pilot ground school FAA written exam knowledge test Checkride prep Preparing for a flight review Pilots Handbook of Aeronautical Knowledge Dewpoint Temperature dewpoint spread

Here we review some wind shear scenarios and 3 potential questions from the FAA private pilot knowledge test.
4:05 What is meant by the term dewpoint?
4:30 The amount of water vapor air can hold depends on the?
4:52 What type of weather for close temp/dewpoint spread?

Link for the Pilots Handbook of Aeronautical Knowledge
https://www.faa.gov/regulations_polic...