With a clinch knot, which you may already know if you've done any kind of fishing, you go through the eye of the hook, wind the tag or short end around the standing part of the leader, pass the tag end back through the loop, right in front of the eye, and then tighten by pulling on the fly and the standing part of the leader.
In the Northern Hemisphere, ocean gyres flow clockwise. This is caused by _____. - 773017
Obviously some are affected by mountain ranges and other such things but it seems like most rivers in the northern hemisphere flow south and the few major ones I know in the southern hemisphere flow north. IIRC the Congo river actually flows north just past the equator and then turns and flows south back past the equator.