Questions

Magnesium is dissolved in seawater at a concentration of about 1,000 parts per million and is the only metal directly extracted from seawater.

A karst topography is that which composes of limestone and its associated features and structures. Karst topography and caves develop in limestone rocks due to their solubility in dilute acidic groundwater. The solubility of limestone in water and weak acid solutions leads to karst landscapes.

Flowing rivers, can be found in areas away from karst topography.

The Government has launched PowerTex India, a comprehensive scheme for powerloom sector development, simultaneously at over 45 locations in the country.

Launching the scheme in Bhiwandi, Thane district, Maharashtra, the Union Textiles Minister, Smt. Smriti Zubin Irani said that Bhiwandi will be known for resurgence in Powerloom sector. Recalling that the powerloom sector alone employs over 44 lakh people, the Minister said that the scheme will especially benefit small powerloom weavers.

Caverns are openings in the ground. Some famous caverns in the United States are Mammoth Cave, Carlsbad Caverns, Wind Cave, and Luray Caverns.

When rainwater trickles down through the soil, it carries carbon dioxide from the air with it. This turns acidic as it moves through the soil, joining with carbon from decaying plants. This acidic rainwater then eats away at, or erodes, the rock under the ground, forming a cave or cavern. For this process to occur, the rock must be the right type; limestone, dolomite, and gypsum are common.