The bigger the wave the harder the fall
<span>The levels of cell organisation in increasing size in a tree, as with all living organisms, are: organelle, cell, tissue, organ, organ system. Organ systems combine to make an organism. </span>
Yes, Chemical reactions occur slower at lower temperatures and faster at higher temperatures. When you put a glow stick in cold water, the chemical reaction slows down but will last for a longer period of time. When you put a glow stick in hot water, the reaction speeds up but will be over quicker.
Not sure about the variable one though, sorry!