Question

E Answer the following questions :

1. What are fossil fuels ?
2. Why should fossil fuels not be wasted ?
3. What are the advantages of using natural gas as a fuel ?
4. Why are fossil fuels our most important source of energy today?
5. Define the terms : (a) mineral (b) ore
6. What is meant by the 'Concentration of ore ?
7. What is an alloy ?
8. Give the constituents and one use of brass.
9. Name an alloy of copper. State its chemical composition and any one use.
10. What do you mean by rock ?
11. What are sedimentary rocks?
12. What are metamorphic rocks ?
13. What do you mean by fossil ?
14. How fossil fuel is formed ?
15. what is carboniferous rock ?
16. give two uses of petroleum ?
17. give two uses of natural gas ?​

Answer 1

Answer:

1. a natural fuel such as coal or oil, that was formed millions of years ago from dead animals or plants in the ground
2. Fossil fuels should not be wasted because they are irreplaceable and non-renewable materials that cannot be produced again and can be completely terminated. Fossil fuels are produced naturally and are generated using natural processes from fossil remains of dead plants.
3. • Natural gas is environmentally friendly because it burns cleaner than other fossil fuels.
5. • It’s safer and easier to store when compared to other fossil fuels.
7. • Natural gas is extremely reliable, unlike electric power that can be knocked out during a storm.
9. • Natural gas is less expensive than other fossil fuels.
11. • The U.S. supply of natural gas is plentiful and helps to decrease our dependence on foreign oil supplies.
12. Fossil fuels are the most import sources of energy today. ... They are high source of energy which on burning gives us heat and light and are cost effective which have made them very much dependable sources of energy. These fossil fuels are utilized for cooking, to run automobile engines, generate electricity.
13. 1) mineral -the naturally occuring compounds of elements are known as mineral. 2) ore- the mineral from which an element can be extracted easily and profitably is called an ore.
14. The process of removal of the gangue from Ore is known as Concentration or Dressing or Benefaction. There are numerous methods of concentration and the methods are chosen based on the properties of the ore.
15. a metal made by mixing two types of metal together
16. Brass is an alloy of copper and zinc. Composition of brass is copper (80 percent) and zinc (20 percent). Brass is used for making vessels and scientific instruments (e.g.microscope).
17. An alloy of copper is brass. It contains copper-80% and zinc-20%. It is used for cooking utensils
18. A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. ... Rocks are usually grouped into three main groups: igneous rocks, sedimentary rocks and metamorphic rocks.
19. Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.
20. Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
21. (part of) an animal or plant that lived thousands of years ago which has turned into rock
22. After millions of years underground, the compounds that make up plankton and plants turn into fossil fuel
23. Carboniferous Limestone is a hard sedimentary rock made largely of calcium carbonate. It is generally light-grey in colour. It was formed in warm, shallow tropical seas teeming with life. The rock is made up of the shells and hard parts of millions of sea creatures, some up to 30 cm in length, encased in carbonate mud.
24. (i) Industrial power:
25. Oil is the major source of industrial power. Diesel and gasoline are used in gas turbines to produce electricity.
27. (ii) Heating and lighting:
28. Heavier oils are used in central heating plants for shops, offices as well as homes. Oil is also used to produce electricity for industrial and domestic use. The lighter grades of oil such as ‘kerosene’ are still used for domestic purposes.
29. (i) Home heating through natural gas furnaces
30. (ii) Warming water in hot water heaters