Fire and cookery , Biology

Fire and Cookery :

Fire and Cookery where and when fiie came to be used  is not known.  Fire, to start with, must have been a frightening thing, giving rise to many myths and legends. However, as man slowly learned to control it, he found it very useful to keep himself wann and to frighten away wild animals. It is easy to imagine that chance eating of  burnt or charred flesh must have led to the idea of cooking, which then made even tough meat edible and tastier.  Thus, it must havetremendously increased the number of  things one could eat.  It was, perhaps, from the use offire for cooking that fired clay pottery and melting of metals for making tools arose.  

Boiling gave rise to certain difficulties. At first, water was heated by dropping hot stones into water in  leather buckets. We find such itones, cracked by heating and chilling,  around prehistoric sites.  The crucial discovery, however, was that by  coating a basket with thick clay it could be put on the fire. Eventually, towards the end of  the Stone Age. it was -discovered  that coated baskets crack while heating, whereas pots made of heat-treated clay do not crack. Fired pottery was,  tlrerel'ore, a very significant discovery. l.'inally, as Lhc problem of storing liquids for long periods in clay pots was tackled, the slower chemical changes of fermentation could be noted and later used for brewing wine.  From the use of dyes, paints and tanning as found in  this epoch, we can  infer that the use of rudimentary chemistry for transforking materials was also in progress in the later part of the Stone Age.  

Posted Date: 9/27/2012 7:05:52 AM | Location : United States







Related Discussions:- Fire and cookery , Assignment Help, Ask Question on Fire and cookery , Get Answer, Expert's Help, Fire and cookery Discussions

Write discussion on Fire and cookery
Your posts are moderated
Related Questions
Extra-ocular muscles There are, as you know, six extra-ocular muscles. Out of these, four are recti(straight) and two are oblique. They control the position and movement of th

What is the Senses explain their Vision ? Vision :  The human eye consists of structures which evolved together to focus light on a sensitive area called the retina. Light f

C dna is made from a mature m rna of eukaryotic cell with the utilization of enzyme called as reverse transcriptase. Steps in c dna creation 1. m rna is made and purified f

Q. How Bone density affect osseointegration? The most important bone property is density which is influenced by factors such as patient age and genetics. Higher density bones h

Animals - Slow Moving Waters Zooplankton are common here and include an assemblage of protozoa and smaller crustacean, such as water flies, and copepods. Neuston occurring her

The left atrio-ventricular aperture in man is guarded by

Define role of Vitamin A in controlling gene expression? Vitamin A as retinoic acid has widespread effects on the synthesis of a variety of important proteins. These diverse ef

Development of Nutritional Biochemistry Nutrition,  in  general, and  particularly nutritional biochemistry, has  traveled a  long way since 1926, when nutrition was first reco

Define Assessment of Manganese Status? The body Mn status has not been yet established by laboratory tests. Though the normal range of serum Mn concentration is found out to b

For the article entitled "The inner life of the genome" which of the following is true? A. Individual chromosomes occupy explained territories within the nucleus. B. The spe