III. Answer the following Questions briefly
1. Define the resource and state its types.
• Any matter or energy derived from the environment that is used by living things including humans is called a Natural resource.
• Natural resources include air, water, soil, minerals, plants, wildlife etc.
Types of resources:
• Renewable resources - The resources that can be replenished. Eg.: Solar energy and wind energy.
• Non renewable resources - The energy that cannot be replenished easily. Eg.: Petroleum, coal.
2. What are minerals and state its type?
• Minerals are natural substances of organic or inorganic origin with definite chemical and physical properties.
Types: • Metallic minerals • Non-metallic minerals
• Metals like gold, copper, iron and lead are metallic minerals.
• Mica, limestone, gypsum, coal and petroleum are examples of non-metallic minerals.
3. State the uses of magnesium.
• Manganese is used for making iron and steel and serves as basic raw material for alloying.
• Manganese is also used in the manufacturing of bleaching powder, insecticides, paints and batteries.
4. What is natural gas?
• Natural gas usually accompanies the petroleum accumulations. It is naturally occurring Hydro carbon gas mixture consisting primarily of Methane.
• It commonly includes varying amounts of other higher Alkanes.
• Sometimes it includes a small amount of Carbon dioxide, Nitrogen and Hydrogen Sulphides.
• When layers of decomposed plants and animals are exposed to intense heat and pressure over thousands of years Natural gas is formed.
5. Name the different types of coal with their carbon content.
• Anthracite (80 - 90% carbon)
• Bituminous (60 - 80% carbon)
• Lignite (40 - 60% carbon)
• Peat (less than 40% carbon)
6. Mention the major areas of jute production in India.
• West Bengal - Concentrated along the Hooghly river within the radius of six kilometre of Kolkata.
• Other jute goods producing areas are Andhra Pradesh, Bihar, Uttar Pradesh, Assam, Chhattisgarh and Odisha.
7. Name the important oil producing regions of India.
Western coast off shore oil fields:
• Mumbai High
• Gujarat coast
• Basseim oil field
• Allabet oil field
• Cambay- Luni Region
• Ahemebadad- kaiol Region
Eastern coast offshore oil fields:
• Brahamputra valiey
• Digbol oil fields
• Nahoratlya oil fields
• Moran- Hugrijan oil field
• Surma valley
• Rudrassgar- Lawa oil fields
• off-shore of Andaman and Nicobar, Gulf of Mannar, Baleshwar coast, Punjab, Haryana and Uttar Pradesh.