Water Conservation and Management - Class VIII

Freshwater protozoans live in a hypotonic environment relative to their cytoplasm. Water enters by osmosis, and they use a contractile vacuole to expel excess water.

This appears to be a specific reference to Indian environmental legislation. The Water (Prevention and Control of Pollution) Cess Act, 1977, is often associated with these administrative codes.

Pani Panchayat is a water conservation movement pioneered by Vilasrao Salunke in the drought-prone regions of Maharashtra, India, to promote equitable water distribution.

Watershed management emphasizes scientific soil and water conservation and tends to increase the biomass production.

Inadequate drainage leads to waterlogging, which causes salts to accumulate in the topsoil as water evaporates, a process known as salination.

The Naga Hills form part of the mountain range along the border between India and Myanmar, acting as a natural watershed.

Water-shed management is the system in which soil and water are conserved by scientific means. Water harvesting techniques help people obtain optimum amounts of water. Check Dams help in collecting water at specific regions and prevent floods. Storage of water below the soil level helps in conservation of water in a better manner. 

The wetlands are responsible for the trapping of the chemicals and harmful wastes. This results in protection of the aquatic systems. This also helps to purify the water since the sediments and the waste is trapped in these regions. This protects the groundwater. The activity of the organisms in these regions allows recharging the surface and groundwater. 

An area or ridge of land that separates water flowing to different rivers, basins or seas is called as watershed. Much of the water comes from rainfall and storm water runoff. Watersheds are usually separated from other watersheds by naturally elevated areas.

Wetlands are areas where water covers the soil or is present at or near the surface of the earth, and their conservation is specifically aimed at protecting these ecosystems.

Scientific estimates of the Earth's surface covered by wetlands vary, but 6% is a commonly cited figure in environmental textbooks.

CCT is the answer, though the question doesn't specify what CCT stands for in this context. This appears to be location-specific water management knowledge.

Water management encompasses the planning, developing, distributing, and managing the optimum use of water resources, including storage for later use.

Water harvesting is the process of collecting and storing rainwater for future use, rather than allowing it to run off.

Wetlands represent approximately 6% of the worlds land surface, while the give percentage in options B, C, D are wrong.

A wetland complex consists of two or more individual wetlands with overlapping riparian management areas or more.

Satellite imagery uses visible light to see cloud structure and infrared to determine cloud top temperature, which correlates with altitude and thickness.

Solar desalination systems use solar energy to evaporate saline or brackish water, leaving salts behind and condensing the pure water vapor.

Kolleru Wetland is located in Andhra Pradesh, not Karnataka. Chandertal Wetland is in Himachal Pradesh, Pangong Tsar is in Jammu & Kashmir (Ladakh region), and Pichola Lake is in Rajasthan - all correctly matched.

The Water Act. defined water pollution and water quality standards. It prescribes penalties to the offenders.

• An artificial method of rain is called seeding cloud. It is a type of weather modification. 
• This method aims at to change the amount of precipitation which falls from clouds. The method uses seeding of certain substances into the air that will serve as cloud condensation. 
• In this, tiny particles like potassium iodide or dry ice are seeded (sprayed) in the atmosphere. 
• The water present in the air is attracted and condenses near the sprayed particles. 
• It further crystallises to form ice. Finally, it causes the rainfall. 
• Thus, the correct answer is option A.