Apparently you were sleeping in Government class as well as Civics.
http://www.leadinglawyers.com/helpdesk/us_constitution.htm
I learned that in 4th grade.
May say on that site as equal, but is that in the Constitution itself?
I don't think so, as they are quite a bit different.
Most of the duties spelled out by the Constitution are for Congress and Executive. Judicial power is unexplained for the most part, which means it is interpretative.
John Marshall, for instance, came out with the concept of the SC deciding whether laws passed by Congress are Constitutional or not.
Assuming a power is tenuous, as the basis can be snatched away as easily as it was assumed.
Another example is the fact that Congress can change the numbers of SC justices, or to eliminate entirely all courts below the SC.
While Congress and Executive have rock-solid responsibilities, the fact that the SC can only act when others abide makes them the inferior of the branches.
Believe me, the nuns that taught me in 4th grade would have drilled it into me if I was not paying attention.
@kevindavis @txradioguy