Coal and Petroleum | Chapter Assessment | English | Grade 8

Which of the following is not a natural resource?

• Coal

• Soil

• Buildings

• Water

Answer explanation

Coal, Soil and Water are all natural resources, whereas buildings are man-made structures.

Tags

NGSS.MS-PS1-3

Which of the following is not an Exhaustible Natural Resource?

• Petroleum

• Forests

• Coal

• Air

Answer explanation

Petroleum, forests and coal are classified as exhaustible natural resources because excessive use of these resources by humans will exhaust them, whereas air can never be exhausted. It's composition can be altered by human activities but there will always be some form of gas present in the atmosphere, which we refer to as air.

____ is not a fossil fuel.

• Water

• Petroleum

• Natural Gas

• Coal

Answer explanation

Fossil fuels are defined as sources of energy, or fuels, that are formed from the dead remains of living organisms, also called fossils. Coal, petroleum as well as the natural gases are fossil fuels because they are formed from the dead remains of living organisms, whereas water is a totally different substance, formed due to different processes.

Coal is formed under __________ .

• High Pressure and Low Temperature

• High pressure and High Temperature

• Low pressure and High Temperature

• Low pressure and Low Temperature

Answer explanation

Coal is formed when dead plants go deeper into the Earth, experiencing high pressures and high temperatures. It takes millions of years for dead plants to convert into coal under these conditions.

Tags

NGSS.MS-ESS3-1

Coal mainly consists of _____________ .

• Nitrogen

• Boron

• Carbon

• Hydrogen

Answer explanation

Coal mainly consists of carbon.

Coal, petroleum and natural gas can be prepared in laboratories.

• TRUE

• FALSE

Answer explanation

Coal, Petroleum and Natural Gas require high pressure and high temperature over a long period of time. It is extremely difficult to produce the conditions required for coal, petroleum and natural gas in laboratories. It takes millions of years, under these conditions, for them to form and it is impossible to have those conditions for millions of years in a laboratory.

Which of the following is not obtained by refining petroleum?

• Coke

• Paraffin Wax

• Diesel

• Lubricating Oil

Answer explanation

Coke is formed from coal. On refining petroleum, we obtain petroleum gas, petrol, diesel, kerosene, lubricating oil, paraffin wax.

Which of the following is the least polluting fossil fuel?

• Coal

• Petroleum

• Diesel

• Natural gas

Answer explanation

Natural Gas is the least polluting fossil fuel amongst the options. It is a cleaner fuel compared to other fossil fuels.

Tags

NGSS.HS-ESS3-4