_____ and _____ form over millions of years from the decay of algae and tiny ocean animals called _____. 8. C + O 2 → CO 2 Coal was used as fuel in steam engines. Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. 13. ... Petroleum Conservation Research Association. 15. Since it was formed from the remains of vegetation, coal is also called a fossil fuel. Pollution ____ is the introduction of harmful waste products chemicals, and substances into the environment. Oxygen c. Carbon d. Sodium Ans . • Since it was formed from the remains of vegetation, coal is also called a fossil fuel. Coal mainly contains a. Hydrogen b. Peatlands Thick, spongy layers of histosol eventually form peat. As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. These plants got buried into the bottom of the soil and deposited as fossil due to heat and pressure. (c) 14. Wildlife, minerals, natural gas, coal and petroleum, etc. Question 8. Peat is a fossil fuel that is the first stage in the long process of plant material turning into coal. Ancient bog plants, mostly sphagnum moss, are the fossils in peat. A COAL MINE 7. Chapter 5: Coal and Petroleum. 7. (b) Coal and petroleum are formed from the dead remains of organisms and are known as fossil fuels. Under high pressure and high temperature, dead plants got slowly converted to coal. Carbon monoxide b. Coal: A fossil fuel, that forms by the decay of vegetation, which existed millions of years ago. (b) The slow process of conversion of dead vegetation into coal is called carbonization. Under high pressure and temperature, slowly plants got converted into coal. Coal is used as fuel because it provides high amount of heat. The buried plants underwent carbonization and changed into coal. 14. The temperature also rose as they sank deeper and deeper. Coke is the almost pure form of carbon. ... some plants grew into giant ferns and mosses. Q46. It is a non-crystalline form of carbon. The slow process of conversion of dead vegetation into coal is called _____ Ans:Carbonization. (c) The black thick liquid with an unpleasant smell is known as coal tar. The temperature also rose as they sank deeper and deeper. With the passage of time, as more and more soil got deposited on them, the buried plants were compressed. Natural gas is called clean fuel because: (a) it burns without producing any smoke (b) it burns completely ... slow process of conversion of dead vegetation into coal (d) fast process of conversion of dead vegetation into coal. nonrenewable. • When heated in air, coal … As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. When heated in air produces a. (b) 16. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. 13. Acid Rain ____ is produced when gases released by burning oil and coal mix with water in the air. Carbonisation: The process of conversion of vegetation into coal is called carbonization. As more soil deposited over them, they were compressed. Slow conversion of dead vegetation Into coal b. Deposition of soil c. falling of trees d. None of these Ans . Carbonisation is a. Deep down the earth, pressure and temperature was very high. (a) 15. (a) The slow process of conversion of dead vegetation into coal is called carbonisation. are exhaustible natural resources. ... We know that coal is formed from dead vegetation. Under high pressure and high temperature, dead plants got slowly converted to coal. In fact, bogs are often called "heaths" after the abundance of heather that blankets them. 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