Kamis, 18 November 2010

Biology Lesson: Hazard Symbols

Okay, I know my blog is king of too much text but no really much picture. so I decided to posting some post with a picture. But also this is related to a school lessons. I know what I wrote are worthless. So what are u waiting for? Still reading these words? Okay, you looks weird there hahahaha. Well, lets check it out! But what I posted in this post is just the basic of Hazard Symbols.


Okay, This symbol named Corrosive. A corrosive substance is one that will destroy or irreversibly damage another surface or substance with which it comes into contact. The main hazards to people include damage to the eyes, the skin, and the tissue under the skin; inhalation or ingestion of a corrosive substance can damage the respiratory and gastrointestinal tracts.


 Named Explosive. An explosive material, also called an explosive, is a substance that contains a great amount of stored energy that can produce an explosion, a sudden expansion of the material after initiation, usually accompanied by the production of light, heat, sound, and pressure. An explosive charge is a measured quantity of explosive material.


Okay I know u will think this is a Flammable symbol. Yeah, u correct. this is Flammable symbol. Flammability is defined as how easily something will burn or ignite, causing fire or combustion. The degree of difficulty required to cause the combustion of a substance is quantified through fire testing. Internationally, a variety of test protocols exist to quantify flammability. The ratings achieved are used in building codes, insurance requirements, fire codes and other regulations governing the use of building materials as well as the storage and handling of highly flammable substances inside and outside of structures and in surface and air transportation. For instance, changing an occupancy by altering the flammability of the contents requires the owner of a building to apply for a building permit to make sure that the overall fire protection design basis of the facility can take the change into account.


No its not skull hazard symbol. U wrong, this is Toxic symbol. Toxicity is the degree to which a substance can damage an organism. Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (cytotoxicity) or an organ (organotoxicity), such as the liver (hepatotoxicity). By extension, the word may be metaphorically used to describe toxic effects on larger and more complex groups, such as the family unit or society at large.


Its not a forbidden symbol. Its Irritation symbol. Irritation or exacerbation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant. Irritants are typically thought of as chemical agents (for example phenol and capsaicin) but mechanical, thermal (heat), and radiative stimuli (for example ultraviolet light or ionising radiations) can also be irritants. Irritation also has non-clinical usages referring to bothersome physical or psychological pain or discomfort.


 Thanks for reading my post. I hope u more understand about this lesson. See u soon!


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