Monthly Archives: April 2008

Acid rain: One of the most important environmental problems

Posted on April 26, 2008 by Rashid Faridi

The term acid rain refers to what scientists call acid deposition.  It is caused by airborne acidic pollutants and has highly destructive results. Scientists first discovered acid rain in 1852, when the English chemist Robert Agnus invented the term.  From … Continue reading →

Posted in Environment | 4 Comments

Geological Time Scale

Posted on April 26, 2008 by Rashid Faridi

Historical records only go back a few thousand years, and are inadequate to treat most geological processes. To understand the timing of geological processes we need to look at the geological rock record. This includes erosion, mountain building and other … Continue reading →

Posted in Archaeology, interior of the Earth, Physical geography | 1 Comment

Coral Reefs are the “Rainforests” of the ocean

Posted on April 26, 2008 by Rashid Faridi

Coral Reefs are the “Rainforests” of the ocean. Reefs are ecologically important ecosystems and have a high biodiversity that serves as a storage bank of rich genetic resources. They are a source of food and medicine, and they protect the … Continue reading →

Posted in oceans | Tagged , , | 7 Comments

Structure and composition of the Earth

Posted on April 26, 2008 by Rashid Faridi

What makes Earth unique? Soon after the Earth formed, unique processes occurred – division into metallic core, silicate mantle and crust – which, along with surface water, made it different from the other planets in our Solar System. The formation … Continue reading →

Posted in interior of the Earth | 1 Comment