Coal and Petroleum Paheli Boojho answer Chapter 5 Class 8 Science
Table of Contents
Answer:
Not all resources are for forever. For example, coal and petroleum reserves are limited. If we use them with caution our future generation will only read them in books.
How coal is formed?
Answer: During floods plants and animals gets buried inside the soil. With time new layers of soil come and deposit on it. As a result, pressure on the dead organism increases. At high temperature, thy gets convert into coals. This process takes millions of years.
3. Can we prepare coals and petroleum in the lab?
Answer:
Formation of coal and petroleum requires high pressure and high temperature in the absence of oxygen. It is a slow process and takes millions of year. Creating such a simulated environment in the lab is very costly. Moreover, such conditions are also dangerous.
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Coal and Petroleum Activity Explanation
Coal and Petroleum Paheli Boojho answer Chapter 5 Class 8 Science
Ref: ch5
