Environmental Science - Study Mode

[#291] Fog that most often forms as warm rain falls into a cold layer of surface air is called:
Correct Answer

(B) Evaporation (mixing) fog

Explanation

Solution: Freezing fog, which deposits rime, is composed of droplets of supercooled water that freeze to surfaces on contact. Precipitation fog (or frontal fog) forms as precipitation falls into drier air below the cloud, the liquid droplets evaporate into water vapor.

[#292] Fine organic or inorganic particles suspended in air is called
Correct Answer

(C) aerosol

Explanation

Solution: Fine organic or inorganic particles suspended in air is called as aerosol particulate matter. It consists of soot, flash, and dust of various types, fur, hair, spores etc. It is classified into settleable and suspended particulate matter.

[#293] CFCs are used as
Correct Answer

(D) all the above

Explanation

Solution: Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

[#294] Ramsar Convention refers to the conservation of ____________
Correct Answer

(B) Wetlands

Explanation

Solution: The Ramsar Convention on Wetlands of International Importance especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands. It is also known as the Convention on Wetlands. It is named after the city of Ramsar in Iran, where the Convention was signed in 1971.

[#295] The earth's atmosphere is divided into layers based on the vertical profile of:
Correct Answer

(B) Air temperature

Explanation

Solution: The term upper atmosphere usually refers to the region of the atmosphere above the troposphere. Many remote sensing satellites follow the near polar sun-synchronous orbits at a height around 800 km, which is well above the thermopause.