A black hole is an object of matter which is compressed so tightly that its gravitational attraction is more powerful than the speed of light. They cannot be seen with optical sensing tools, because light cannot reflect off of their surface; the light is consumed by the gravity well and so the space is completely dark. A wormhole is not the same thing, although science theorizes that the intense gravity of a black hole could cause a wormhole. A wormhole is a theoretical place where the fabric of space-time has been ripped or folded, causing an anomaly where two locations in space are linked; theoretically, this could allow travel through vast areas in space without needing faster-than-light travel. Wormholes have not been proven to exist, and in fact they might be impossible considering what we know about physics. However, since a black hole acts on gravity so powerfully, it is possible that a sufficiently dense black hole could cause this sort of situation; it is more likely, though, that the black hole would destroy any traveler long before they encountered a space-time rip.
black holes are actually the invisible bodies through which even light cannot escape. Their presence is identified by the radiations emmitted by them and the movement of stars around them.
A worm hole is a tunnel which connects two points in space time such that theoretically it should take a shorter duration to move between the two points than if the same was attempted at the speed of light in normal space.
Worm holes are only hypothetical as none have been identified till now. They are only solutions to the equations of Einstein’s General Theory of Relativity. Wormholes can allow us to travel between points in our universe as well as between points linking our universe and other universes. This follows from the fact that the theory of relativity postulates an infinite number of parallel universes.