What are the spikes on my potatoes? I have had them on my counter for a min and it looks like they are turning into mutants

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

During convection, less dense fluid rises and denser fluid sinks.

Pl as time goes by and water goes through the water cycle again and again, the amount of water on earth: increases decreases ostays the same goes up and down