What is the white fluffy part of a dandelion called?
That is the seed head.
Popcorn pops because the small amount of water in the kernel vaporizes as it heats up. The resulting popped corn weighs less than the original kernel because the weight of the water is no longer in it. Also, the resulting of the steam popping open the kernel the steam loosens and softens the dense carbohydrate part (the white fluffy part) of the corn kernel itself which decreases the density of the carbohydrate (white fluffy part)…
Cotton is part of the seed of the cotton plant. The cotton is white fluffy strands attached to the cotton seed that allows the seed to catch the wind and be dispersed. We collect these fluffy bundles just as the pod opens and scrape off the seed, keeping the cotton fluff which is combed and twisted into cotton thread.
Because they need a lot of fur to keep their body warm when the are very little. My cat is about ten months old and she is very small and she is very fluffy. Most small cats are fluffy. Some big ones are fluffy too. It just depends on the breed. But my cat is part of a short haired cat breed and yet she is still fluffy because she is very small.