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.
1 A magnet creates an invisible area of magnetism all around it called a magnetic field.  The north pole of a magnet points roughly toward Earth's north pole and vice-versa. That's because Earth itself contains magnetic materials and behaves like a gigantic magnet.