Energy Sources in Grade 12 Higher Level Chemistry

What are the main components of fossil fuels?

• Argon, Neon, Krypton, Xenon

• Silicon, Phosphorus, Magnesium, Calcium

• Carbon, Hydrogen, Sulfur, Oxygen, Nitrogen

• Iron, Nickel, Copper, Zinc

Name two examples of renewable energy sources.

• Nuclear energy

• Geothermal energy

• Solar energy, Wind energy

• Hydropower energy

How does nuclear energy generate electricity?

• Nuclear fission releases energy that heats water to produce steam, which drives turbines to generate electricity.

• Nuclear energy is harnessed by wind turbines to generate electricity.

• Nuclear energy is generated by burning fossil fuels to produce electricity.

• Nuclear fusion releases energy that heats water to produce steam, which drives turbines to generate electricity.

What is the primary advantage of using biofuels as an energy source?

• Unreliable energy output

• Higher greenhouse gas emissions

• Limited availability and high cost

• Renewable and lower greenhouse gas emissions

Which fossil fuel is the most commonly used for electricity generation?

• Oil

• Natural Gas

• Coal

• Wind

What is the process of converting sunlight into electricity called?

• photovoltaic transformation

• sunlight electrification

• solar photovoltaic conversion

• solar thermal conversion

What is the main environmental concern associated with nuclear energy?

• Generation of radioactive waste

• Decrease in greenhouse gas emissions

• Increase in renewable energy sources

• Improvement in air quality

How do biofuels differ from fossil fuels in terms of carbon emissions?

• Biofuels are considered carbon-neutral as the carbon dioxide released during their combustion is offset by the carbon dioxide absorbed during the growth of the plants used to produce them, while fossil fuels release carbon dioxide stored underground for millions of years.

• Biofuels do not contribute to carbon emissions

• Fossil fuels are considered carbon-neutral like biofuels

• Biofuels release more carbon dioxide than fossil fuels

What are the two main types of biofuels?

• Methanol and Gasoline

• Ethanol and Biodiesel

• Hydrogen and Propane

• Solar and Wind

What is the potential drawback of relying solely on renewable energy sources?

• Environmental impact

• Intermittency

• Limited availability

• High cost