Fire and cookery , Biology

Assignment Help:

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.  


Related Discussions:- Fire and cookery

Explain about chlorophylls - natural pigments, Explain about Chlorophylls ...

Explain about Chlorophylls Chlorophylls are used as colourants in a range of foodstuffs and both natural chlorophyll (containing magnesium as the central metal ion) and 'coppe

Define chlorophyll - natural colourant, Chlorophyll Chlorophyll is the...

Chlorophyll Chlorophyll is the porphyrin most widely used as a natural colourant. Its widespread occurrence in photosynthetic  tissue and its breakdown character have prompted

Ideal eia and measures and benefits of eia, An ideal EIA system would: ...

An ideal EIA system would: (i)     Apply to all projects that are expected to have significant environmental effects and address all impacts that are expected to occur due to t

Explain the alpha-helix and the beta-sheet protein, Normal 0 fa...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Widal test is used for the diagnosis, Widal test is used for the diagnosis ...

Widal test is used for the diagnosis of: 1. Malaria 2. Pneumonia 3. Tuberculosis 4. Typhoid Typhoid

Acute bronchitis, Acute Bronchitis: Acute bronchitis is inflammation  ...

Acute Bronchitis: Acute bronchitis is inflammation  of one or more bronchi  and occurs specifically  in children younger than  four year?.  It is usually associated with previ

What are the parathyroids, Q. What are the parathyroids? Where are they loc...

Q. What are the parathyroids? Where are they located and what are the hormones secreted by these glands? The parathyroids are four small glands embedded two in each posterior f

Tricuspid valve replacement, Tricuspid Valve Replacement :  It is don...

Tricuspid Valve Replacement :  It is done for organic tricuspid valve disease and at times for functional tricuspid I regurgitation. When done along with other procedures, it

What are the five human digestive secretions, What are the five human diges...

What are the five human digestive secretions? Which of them is the only one that does not contain digestive enzymes? The human digestive secretions such as: saliva, gastric jui

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd