the firsthand record
Primary Source
A letter is a primary source.
it is a primary source because it wasnt real
A primary source might be a letter, photograph, or speech that
When researching American independence or almost any founding-period subject, the Declaration of Independence is indeed a primary source. The difference between primary sources and secondary sources hinges on this simple distinction: a primary source is (or was) "there", while a secondary source is (or was) not "there" but instead talks "about" it.
primary source
By definition of a historical primary source (by someone with direct knowledge from the time), a original political cartoon is a primary source. By definition of an English primary source (it is printed), it is a primary source. By definition of the final form of primary sources (see definition of primary source on www.answer.com), it is based on someone's interpretation of the time and is thus a secondary source.
The invention of measuring tools is prehistoric, therefore by definition there won't be a primary source.
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The primary source of uncertainty over the limits on presidential power is the constitutional definition.
primary source
The primary light source is the sun for the planet Earth.
The term clean source of energy refers to only primary energy sources as wind or solar energy. Electricity, by definition, is not a primary energy source. It is a secondary energy source that is could be produced by a clean energy source as wind or any renewable primary energy source or produced by fossil energy source as oil, natural gas, or coal.
(A) primary source; (B) secondary source
Someone who conducted the experiment.
An interview with a witness to a historical event would be the best example of a primary source, as it provides firsthand information from someone who experienced the event.
It is a primary source.