Tag: science & technology

AIDS stands for Acquired Immune Deficiency Syndrome (often abbreviated as Acquired Immunodeficiency Syndrome). Option C says 'Acquired Immuno Deficiency syndrome' which matches the correct expansion - 'Immuno' is shorthand for 'Immune'. This is the medically accepted full form.

HIV stands for Human Immunodeficiency Virus, which is the medically and scientifically correct expansion of the acronym. The virus specifically targets and weakens the human immune system, leading to AIDS if untreated.

HIV belongs to the retrovirus family, characterized by viruses that use reverse transcriptase to convert their RNA into DNA, which then integrates into the host cell's genome. This is a fundamental characteristic of HIV's replication mechanism.

HIV belongs to the lentivirus genus, which is characterized by slow progression and long incubation periods. Lentiviruses are a subgroup of retroviruses that cause chronic diseases with extended clinical latency periods.

World AIDS Day is observed annually on December 1st, designated by the World Health Organization to raise awareness about the HIV/AIDS pandemic, honor those who have died, and show support for people living with HIV. It was first observed in 1988.

A diamond is pure carbon in its most concentrated crystalline form. Diamonds are composed entirely of carbon atoms arranged in a tetrahedral structure, making them the hardest known natural substance.

Diamonds form approximately 100 miles below the Earth's surface in the mantle's molten rock under extreme pressure and temperature conditions. They are brought to the surface through volcanic pipes and kimberlite eruptions.

Kimberlite pipes were first discovered and mined in Kimberley, South Africa, which gave these diamond-bearing geological formations their name. The town itself was named after the British Secretary of State for the Colonies, the Earl of Kimberley.

Diamond ranks 10 on the Mohs Hardness Scale, making it the hardest known natural mineral. The scale runs from 1 (talc, softest) to 10 (diamond, hardest), with each mineral able to scratch those below it.

Bruiting (or bruting) is the traditional process of shaping and cutting diamonds by hand using another diamond as a cutting tool. This differs from cleaving (splitting along natural planes) or polishing (creating the finished facets).