8.1 Fuels

• Fuels store chemical energy that can be converted into electrical or mechanical energy
• Match the fuel type with its source:

  Fossil Fuels ↔️ Remains of ancient organisms

  Biomass Fuels ↔️ Recently living organisms

  Nuclear Fuels ↔️ Radioactive elements
• Biomass fuels are derived from plants and animal waste.


  True
• Match the fuel type with its examples:

  Fossil Fuels ↔️ Coal, oil, natural gas

  Biomass Fuels ↔️ Biofuels, wood, agricultural waste

  Nuclear Fuels ↔️ Uranium, plutonium
• Natural gas is mainly composed of methane.
• Biomass fuels have lower carbon emissions because carbon absorbed during plant growth offsets carbon released during combustion.
• Fuels release energy when burned or reacted to generate heat, light, or power.energy
• Fossil fuels are derived from ancient plants and animals subjected to heat and pressure over millions of years.
• Biomass fuels are derived from recently living organisms and offer a renewable alternative to fossil fuels.
• In nuclear fission, the nucleus of a uranium or plutonium atom is bombarded with neutrons.
• The choice of fuel type often involves trade-offs between energy, environment, and sustainability considerations.
• Nuclear fuels produce no carbon emissions


  True
• What are fossil fuels derived from?

  Ancient plant and animal remains
• What is one environmental impact of oil spills?

  Harm to ecosystems
• Nuclear fuels release energy through nuclear fission
• What are the three main fuel types discussed in the study material?

  Fossil, biomass, nuclear
• Nuclear fuels produce high energy density and low carbon emissions but require radioactive waste management

  True
• What determines the sustainability of biomass fuels?

  Sourcing practices
• Wind energy captures wind power using turbines
• Why are modern energy innovations important?

  Addressing climate change
• What is the role of fuels as energy sources?

  Release energy when burned
• Fossil fuels like coal and oil are examples of fuels.


  True
• Fossil fuels are considered non-renewable energy sources.
• Each fuel type has unique properties, advantages, and disadvantages
• Coal has high carbon emissions when burned.

  True
• What are examples of biomass fuels?

  Biofuels, wood, agricultural waste
• Match the biomass fuel with its source:

  Biofuels ↔️ Corn, sugarcane, vegetable oils

  Wood ↔️ Forests

  Agricultural waste ↔️ Crop residues
• Biomass fuels are derived from recently living organisms and are considered renewable.

  True
• Natural gas may leak methane, a potent greenhouse gas.

  True
• What is the process by which nuclear fuels release energy?

  Nuclear fission
• What is a major disadvantage of fossil fuels?

  High carbon emissions
• Biomass fuels have lower carbon emissions
• Fuels can be classified into three main categories: fossil, biomass, and nuclear
• Coal has high carbon emissions
• What are three examples of biomass fuels?

  Biofuels, wood, agricultural waste
• Match the fuel type with its characteristic:

  Fossil Fuels ↔️ Non-renewable

  Biomass Fuels ↔️ Lower carbon emissions

  Nuclear Fuels ↔️ High energy density
• Fossil fuels contribute to climate change through high carbon emissions
• How does solar energy generate electricity?

  Photovoltaic cells
• Hydrogen energy produces only water as a byproduct when used as fuel


  True
• What are common applications of fossil fuels?

  Electricity, vehicles, industry