Advantages: Primary sources directly address your topic and often provide information that is unavailable elsewhere. For example, the questions you compose for an interview or a survey will likely target your unique interest in the topic. Similarly, to test a particular hypothesis, you can design your own experiment.
Disadvantages: Some primary sources, such as eyewitness accounts, may be too close to the subject, lacking a critical distance. Others, such as interviews, surveys, and experiments, are time consuming to prepare, administer, and analyze. Finally, unless you have been trained in accepted methodologies, your own primary research in certain fields of study may not be recognized as valid.
Is the phenomenon that any change in the net radiation balance tends to produce a larger change in temperature near the poles than the planetary average.
Ming Dynasty is last dynasty in China ruled by ethnic Han Chinese.
than was the Shun dynasty, soon replaced by the Manchu-led Qing dynasty
Answer:
The Paleo-Indians are the first native tribes found in America.
Mesopotamia was located in parts of the areas now known as Iraq, Turkey, Syria, and Iran.
