Answer:
Should
Explanation:
Should, it makes more sense to use the word "should not" instead of "must not".
<span>A. They were sweethearts. </span>
Relative dating techniques can only be used to detemine the relative age of an object, not to measure the absolute age of an object.
In order to measure the absolute age of new fossils, scientists typically employ a method called radiometric dating (or radiometric dating, same method with a different name). This method uses radioactive isotopes.
The correct answer is:
<span>c. Scientists use radioactive isotopes to determine the absolute age of a new fossil.</span>
Answer:
secondary source
Explanation:
An encyclopedia entry about the Battle of Gettysburg is considered a secondary source of information.
The Battle of Gettysburg was fought from July 1 to July 3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War. The battle involved the largest number of casualties of the entire war and is often described as the war's turning point.
An encyclopedia is considered a secondary and even tertiary source. It is secondary because it does not include first-hand account of the (historical) events, and it is considered tertiary because it mostly quotes/cites other secondary sources such as journals, newspaper articles, books etc.
A primary source consists of only first-hand accounts of the experiences and events.
A secondary source consists of analyses, critical essays about first-hand accounts (primary sources).
