Answer:
Primary sources are things that provide firsthand evidence or information about a particular topic/event.
Secondary sources are things that provide information on a particular topic/event that are not firsthand. These things are "one-step" removed from primary sources.
1.) a newspaper article about the US constitution (secondary source)
***depending on your specific research topic, this could be a primary source***
2.) a magazine article providing healthcare tips (secondary source)
3.) the Declaration of Independence (primary source)
4.) a document from the Bureau of the United States Government (primary source)
5.) a textbook on US history (secondary source)
6.) a company's financial reports (primary source)