In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Dew is water in the form of droplets that appears on thin, exposed objects in the morning or evening due to condensation. As the exposed surface cools by radiating its heat, atmospheric moisture condenses at a rate greater than that at which it can evaporate, resulting in the formation of water droplets.
why does dew form on the ground during clear calm summer nights