Is Greenland part of North America?

Yes.

http://www.google.com/#q=Greenland

Technically, yes, Greenland is part of North America, but it's also part of the country of Denmark

Yes, Greenland is considered part of North America. However, it is an autonomous territory of Denmark. To determine this, you can use several reliable sources:

1. Geographic location: Greenland is situated in the northern part of the Atlantic Ocean. It is located east of the Canadian Arctic Archipelago and northeast of mainland North America.

2. Political affiliation: Greenland has been a constituent country within the Kingdom of Denmark since 1953. While it has its own government and a degree of self-governance, it is still considered part of the larger North American continent.

3. Cultural ties: Greenland shares some cultural and historical connections with North America, especially with Indigenous peoples such as the Inuit who have inhabited the region for thousands of years.

It's always a good idea to consult multiple sources, such as reputable geography references, official governmental information, or reliable academic publications when seeking accurate information.