Class 8 Exam > Class 8 Notes > Science Class 8 > Unit Test: Coal and Petroleum
Unit Test: Coal and Petroleum | Science Class 8 PDF Download
Time: 1 hour
MM: 30
Attempt all questions.
- Question numbers 1 to 5 carry 1 mark each.
- Question numbers 6 to 8 carry 2 marks each.
- Question numbers 9 to 11 carry 3 marks each.
- Question number 12 & 13 carry 5 marks each
Q1: Which of the following is a fossil fuel?
(i) Sunlight
(ii) Water
(iii) Coal
(iv) Wind
Q2: The process of conversion of dead vegetation into coal is called ___________.
Q3: Which of the following is obtained from petroleum?
(i) Naphthalene balls
(ii) Natural gas
(iii) Bitumen
(iv) All of the above
Q4: Natural gas is stored under high pressure as ___________.
Q5: Fill in the blank: Petroleum is also known as ___________.
Q6: Why is petroleum called a fossil fuel?
Q7: What is coal gas, and how is it used?
Q8: Explain the importance of natural gas as a fuel.
Q9: Describe the process of refining petroleum.
Q10: Explain the formation of coal and its types.
Q11: Differentiate between CNG and LPG.
Q12: Explain the environmental impact of using fossil fuels like coal and petroleum.
Q13: Discuss the measures that can be taken to conserve fossil fuels.
You can find the solutions of this Unit Test here: Unit Test (Solution): Coal and Petroleum
The document Unit Test: Coal and Petroleum | Science Class 8 is a part of the Class 8 Course Science Class 8.
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FAQs on Unit Test: Coal and Petroleum - Science Class 8
| 1. What are the main uses of coal in our daily lives? |  |
Ans. Coal is primarily used as a source of energy. It is burned to produce electricity in power plants, used in industries for heating and as a fuel for steam engines. Additionally, coal is also important in the production of steel, cement, and various chemicals.
| 2. How is petroleum formed? | |
Ans. Petroleum is formed over millions of years from the remains of tiny sea creatures that died and settled on the ocean floor. Over time, heat and pressure transformed these organic materials into hydrocarbons, which make up crude oil and natural gas.
| 3. What are the environmental impacts of using coal and petroleum? | |
Ans. The use of coal and petroleum contributes to air pollution, greenhouse gas emissions, and climate change. Burning coal releases carbon dioxide, sulfur dioxide, and other harmful pollutants, while petroleum extraction and processing can lead to oil spills and habitat destruction.
| 4. What are the differences between coal and petroleum? | |
Ans. Coal is a solid fossil fuel primarily composed of carbon, while petroleum is a liquid fossil fuel made up of hydrocarbons. Coal is mainly used for electricity generation and industrial processes, whereas petroleum is used for transportation fuels, heating, and as a raw material in the chemical industry.
| 5. What are renewable alternatives to coal and petroleum? | |
Ans. Renewable alternatives include solar energy, wind energy, hydroelectric power, and biofuels. These sources are more sustainable and have a lower environmental impact compared to fossil fuels, helping to reduce greenhouse gas emissions and combat climate change.
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