Actual questions from the US citizenship exam

Description

I have to responde all of them.
What is the supreme law of the United States.?

Name one branch or part of the government?

What stops one branch of the government from becoming too powerful?

What territory did the United States buy from France in 1803?

Name one of the two longest rivers in the United States?

Why does the flag have 13 stripes?
Name one U.S. territory?

Who is the Chief Justice of the United States now?

What group of people was taken to America and sold as slaves?

What is one right or freedom from the First Amendment?