Question

Clouds will from when condensation nuclei are present and:
air reaches its dewpoint.
is that all true?

Answer 1

Since this is not my area of expertise, I searched Google under the key words "<I>cloud formation</I>" to get these possible sources:

http://www.google.com/imgres?imgurl=http://www.weatherquestions.com/Cloud_formation_convective.gif&imgrefurl=http://www.weatherquestions.com/How_do_clouds_form.htm&h=95&w=126&sz=13&tbnid=y26vuBzZ1k8J:&tbnh=95&tbnw=126&prev=/images%3Fq%3Dcloud%2Bformation&sa=X&oi=image_result&resnum=1&ct=image&cd=2
http://www.google.com/imgres?imgurl=http://www.fas.org/irp/imint/docs/rst/Sect14/cloudform1.jpg&imgrefurl=http://www.fas.org/irp/imint/docs/rst/Sect14/Sect14_1b.html&h=106&w=126&sz=61&tbnid=j3OFP-BSalEJ:&tbnh=106&tbnw=126&prev=/images%3Fq%3Dcloud%2Bformation&sa=X&oi=image_result&resnum=1&ct=image&cd=3
http://en.wikipedia.org/wiki/Cloud
http://www.infoplease.com/ce6/weather/A0857399.html
http://www.physicalgeography.net/fundamentals/8e.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.