Class 8 Exam > Class 8 Videos > Science Class 8 > Quick Revision: Coal and Petroleum
Quick Revision: Coal and Petroleum Video Lecture | Science Class 8
FAQs on Quick Revision: Coal and Petroleum Video Lecture - Science Class 8
| 1. How is coal formed? |  |
Ans. Coal is formed from the remains of plants that lived and died millions of years ago. The dead plants were buried under layers of sediment, which over time, turned into coal due to heat and pressure.
| 2. What are the different types of coal? | |
Ans. The main types of coal are lignite, sub-bituminous, bituminous, and anthracite. These types differ in their carbon content, energy value, and properties.
| 3. How is petroleum formed? | |
Ans. Petroleum is formed from the remains of tiny sea creatures and plants that were buried under layers of sediment millions of years ago. Heat and pressure transformed these organic materials into petroleum.
| 4. What are the uses of coal and petroleum? | |
Ans. Coal is used for electricity generation, steel production, and heating. Petroleum is used for fueling vehicles, producing plastics, and making various chemicals and products.
| 5. What are the environmental impacts of coal and petroleum use? | |
Ans. The burning of coal and petroleum releases greenhouse gases and other pollutants into the atmosphere, contributing to air pollution, climate change, and environmental degradation.
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