How to distinguish Ursa minor from the Big Dipper?

In ancient China, the seven bright stars in Ursa Major were considered to be in the shape of a spoon, which is what we often call the Big Dipper.

Ursa minor, the constellation closest to the north celestial pole, includes Ptolemy and Ursa minor in the modern 88 constellations. Ursa minor marks the position of the north celestial pole, and Alpha Ursa minor, the brightest star in the constellation, is the current Polaris. Polaris is only one (the brightest) in Ursa minor, namely Alpha in Ursa minor.

Their relationship is as follows: