You will see that the leaves of an under-watered marijuana plants are firm and curling down because there is a lot of water to hold in its leaves. The leaves appear healthy but bent. The firmness of the leaves can be observed by touching it. The over-watered marijuana plant has a weak, bendy, and unhealthy leaves.
A compass needle's north point has to be attracted to the end of the Earth which it would on the actual Earth, and as the compass needle has north at the North end, that end is attracted to a south magnetic pole. (The capitalisation convention on this page is that geographical things have initial letter capitals (eg.
Our planet also has two magnetic poles: the North Magnetic Pole and the South Magnetic Pole. The magnetic poles are near, but not quite in the same places as, the geographic poles. The needle in a compass points towards a magnetic pole. When you are far away from a pole a compass is very helpful if you want to find your way around. The compass needle points pretty much due North (or South if you live in the Southern Hemisphere!). However, if you are near either pole, a compass becomes useless. It points towards the magnetic pole, not the true geographic pole.