Trilobites were rapidly evolving and widespread marine organisms that spanned a number of geologic time periods. Certain types of trilobites only appeared in specific segments of geologic time; therefore, when one of these trilobites is found, you can be certain that the rock layer it is found in is of a certain geologic age.
Answer: because water and electricity doesn’t mix well
Explanation:
Lincoln's 1857 Emancipation Proclamation warned that the issue of slavery could destroy the nation.
Answer: Option A
<u>Explanation:</u>
This proclamation was given by Abraham Lincoln when the civil war was in its third year. The proclamation changed the status of almost 3.5 million slaves. The slaves were freed post the proclamation.
Slavery was a major issue that had led to the civil war and this proclamation changed the manner in which slavery was viewed.
The proclamation made freeing the slaves an explicit goal of the war. The proclamation did not lead to immediate abolition of slavery but ensured that most of the slaves in the Union were freed.