How does the other branches of government "check" the judicial branch in order to keep it from becoming too powerful?

My answer is: The President puts forward the nomination for the judges and the Senate confirms them, this is considered to be a part of checks and balances. The judicial branch is not the most powerful branch of government because the judicial branch does not implicate the policy but instead they can rule a law to be unconstitutional.
Is this correct?
I'm not really sure if I answered this question right.
Thanks.

2 answers

Yes, you're correct.

Another seldom-used check is the ability of Congress to introduce a Constitutional Amendment and have it voted on by the people.
when this happend I was only about to turn 2 wtf *-*