The Nuremberg Laws

1. Who could now be defined as a "Jew"?

According to the laws, anyone who had 3 or 4 Jewish grandparents was declared a Jew, regardless of what religion that person was.
2. What was meant by "Aryanizing" Jewish Businesses?

The Nazis Aryanized Jewish businesses by replacing Jewish shop or business owners with non-Jewish Germans.
3. How were Jews who were professionals (lawyers, doctors etc.) restricted?

Jews who were doctors were prohibited from treating non-Jews, and Jews that were law students were not allowed to practice law anymore.
4. What did Jewish identity cards need to include now?

The government made it so that all the Jewish identity cards had a red J stamped on them (for Jew), and if they did not have a Jewish sounding first name, they had a middle name that sounded more Jewish put into their names, "Isreal" for men, and "Sara" for women. This enabled German police to identify Jews far more easily than before.
5. What was the "Law for the Protection of the Hereditary Health of the German People" (sum up in your own words)?

The "Law for the Protection of Hereditary Health of the German People" made it so that any two people who wanted to get married had get a certificate from the public health authorities that stated that those two people were fit to marry. These certificates were not given to people that had hereditary illnesses or contagious sicknesses or were trying to marry, but were violating the Nuremberg Laws in any way, like a Jew wanting to marry and Aryan.