Final answer:
The attack on Pearl Harbor weakened the American military, changed public opinion and support for the war, and caused fear and uncertainty among Americans.
Step-by-step explanation:
The attack on Pearl Harbor changed the lives of many Americans in several ways. One major impact was that the American military was weakened by the attack, with eight battleships being sunk or damaged and hundreds of aircraft destroyed or damaged.
Additionally, the attack led to a shift in public opinion and support for the war, with the American people overwhelmingly supporting the president's request for war. This resulted in Americans joining the military and helping their nation prepare for the impending struggle.
The attack also led to fear and uncertainty among Americans, particularly on the West Coast, as they feared a Japanese invasion. This fear extended to Japanese Americans, who faced discrimination and mass arrests.