Environmental Science MCQ Questions and answers | EVS MCQ

Particulate matter contains microscopic solids or liquid droplets that are so small that they can be inhaled and cause serious health problems. Some particles less than 10 micrometers in diameter can get deep into your lungs and some may even get into your bloodstream.

Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold. However, a gradual increase in CO 2 concentrations in Earth's atmosphere is helping to drive global warming, threatening to disrupt our planet's climate as average global temperatures gradually rise.

Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2) (both amorphous and crystalline), aluminium oxide (Al2O3) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata.

The term ecosystem was first used in 1935 in a publication by British ecologist Arthur Tansley. Tansley devised the concept to draw attention to the importance of transfers of materials between organisms and their environment.

Artificial ecosystems are maintained artificially by man. A pond constructed as a part of wastewater treatment plant is an example of artificial ecosystem. In these types of ecosystem, the only source of power is solar energy.

Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust. It is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.

Small remnants of evergreen forest are found in Odisha state.[D] Semi-evergreen forest is more extensive than the evergreen formation partly because evergreen forests tend to degrade to semi-evergreen with human interference.

The constitution of the Calcutta bench was followed by another in Chennai. On September 2,1996, while passing an interim order in the Tamil Nadu tanneries case, a full bench of the SC comprising Justices Kuldip Singh, Falzan-uddin and K Venkataswami asked the chief justice of the Chennai High Court to constitute a special green bench to deal with environmenal matters - including the tanneries case - in that state.

Today this survivor from the prehistoric times is found only in pockets in the north eastern state of Assam and in Nepal. In Assam, their Rhino habitat is limited to just two national parks - Kaziranga and Manas.

Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, may be of the same or of different species.