Uncertainty:
The uncertainty principle has to quantities, position and momentum, that are the subject of the Heisenberg uncertainty principle. It describes the precision with which these two quantities can be known for any object. The definition of uncertainty is something that is not exactly known or if it is known, there's a slight bit of doubt to its exactness. I feel that it's not only used in physics, but all subjects in or outside of school. The universe is such a wide and open field filled with questions that cannot be answered. Yes, as time goes on more questions do get proven, but it's impossible to solve everything. Uncertainty will never go away, and w'll always be left with that one bit of doubt or unknowingness.
Causality:
Cause and effect! I think it's interesting...but maybe it's because as humans, we're looking to notice these correlations. I think instances are bound to happen, and could be just a coincidence. Even just doing a bit of research online about causality opens up a lot of theories and gives more insight on the subject. It's quite fascinating!
Is the Universe Weird?
Yes! But how do we define weird? Is it something we can't explain? Strange? Funny? Out of place? It's a broad term, but I think it fits the universe. Then again...how do we define "normal?" Maybe it's the universe that's normal and WE'RE weird. The questions just keep continue.....