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Acid solution weathering
Weathering is accelerated by the presence of the hydrogen ions in water. Rain water dissolves CO2 from air to form carbonic acid, H2CO3. When this acid comes in contact with rocks that contain lime, soda and potash, the minerals containing calcium, magnesium and potassium in these rocks chemically change into carbonates and dissolve in rain water. For example calcite in limestone reacts as given below:
three adaptations that help humans have differential survivability, and three adaptations that help humans have differential fecundity.
SEA WATER HAS TO BE FILTERED TO REMOVE MOST SOLID IMPURITIES IN IT BEFORE IT UNDERGOES MEMBRANE DESALINATION .SUGGEST ONE REASON.
Some Physical Features of the Atmosphere: i) The atmosphere is a mixture of gases. It is made up of 78.08% nitrogen; 21% oxygen by volume. There is only 0.03% of carbon dioxi
Fire Escapes : When a fire breaks out in a building, it is not unusual for people to panic. Sometimes flames can spread rapidly, especially if fanned by blow of air from open or b
Is zero an positive integer ?
Discuss in brief about the Red soils Red soils are characterised by a rusty red colour due in most cases to the presence of various oxides of iron. They are either formed in
Define the auditory area of the Cerebrum The auditory area lies immediately below lateral sulcus within the temporal lobe as can be seen in Figure. Cells receive and interpret
Explain the Role of cholecystokinin Pancreozymin (CCK-PZ): The presence of food in the upper small intestine also causes another hormone, CCK-PZ to be released. It is a polypep
Explain the Anti-Diuretic Hormone (ADH) It is secreted by the pituitary gland and controls the ability of water to pass through the cells in the walls of the collecting ducts.
Preparation of Guidance Charts for First Aid Your Counsellor will form groups of four students. Using the materials from the sections of Unit 16 mentioned in each case below, each
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