Composition Ex. 1] Note making From The Speech
The energy stored in coal and petroleum originally came to the earth from the sun. The bulk of the present-day supplies was laid down some 200 to 600 million years ago, when tropical conditions were widespread. Lush, swampy forests produced huge trees; warm coastal seas swarmed with microscopic forms of life. When these organisms died, much of their tissue was recycled as it is today through scavenging and decay. But a significant amount of dead plant and animal material was covered with mud, which prevented complete decomposition. With the passage of time, layer upon layer of the fine sediment was deposited over the once-living
material, the sheer weight turned the sediments to rock. Ex. 1] Read the above speech and make proper note for it.
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1) Energy stored in coal, petroleum came from sun
2) bulk of present-day supplies – laid down some 200-600 million years ago
3) coastal seas teemed with microscopic forms of life in tropical conditions – these organisms
died – tissues recycled through scavenging and decay
4) dead plants and animals covered with mud, prevented from total decomposition
5) layers of sediments- weight accumulation – sediments turned into rocks – pressure built – formation of coal and petroleum preserved under pressure
6) today, conditions unsuitable for coal – production not in significant quantities
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