How to embed Forms on Google Sites.

When you create a Spreadsheet Form you get a long URL like https://spreadsheets.google.com/viewform?formkey=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX..

It is better to embed the URL on your blog or site or Google Site. Embeding on Google Sites is very easy. You just create a page on Google Site and insert the Spreadsheet Form.

While inserting you need to give the required height and width of the form which you can get by clicking Form/Embed_form_in_a_webpage on spreadsheet. e.g.:
iframe src="https://spreadsheets.google.com/embeddedform?key=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" width="760" height="3744" frameborder="0" marginheight="0" marginwidth="0">Loading.../iframe

Just take the width and height from the embed link and put it while inserting on Google Sites.

If you want to embed on any other site or blog you need the whole link with iframe command.