Answer:
An extermination camp was a place to send people to be killed. Most of this happened during Adolf Hitlers rule when he killed millions of Jews. These camps were a fast easy way to exterminate a group of people.
The discovery of radioactivity closely followed the discovery of X-Rays. The X-Ray was accidentally invented by Wilhelm Conrad Röntgen in 1895. With the help of his wife, Röntgen tested his wife's hand and captured the bones in her hand and her wedding ring. It became the first röntgenogram and garnered attention from the public and the scientific community.
Answer: The principle of "separate but equal"
Explanation: In the court case <em>Plessy v. Ferguson</em>, the doctrine of "separate but equal" was declared constitutional and legal, even under the Fourteenth Amendment.
