If you are not familiar with creating Google forms, familiarize yourself with this information:
» Create a survey using Google Forms
Watch this video if you are a audio and visual learner:
After you have created your form, simply embed it using the tags.
This is a sample of a Google Contact Form:
https://docs.google.com/forms/d/1mpiawxVsYqxEmm07ATIGZLHBoldl0Hj9n5uttcNZH6A/viewform