Introduction to Energy - JSS2 Basic technology Past Questions and Answers - page 2
Which energy source is derived from the decomposition of organic matter?
Geothermal energy
Biomass energy
Wind energy
Nuclear energy
What does nuclear energy result from?
Fossil fuels
Solar radiation
Nuclear reactions
Wind turbines
Why is understanding energy forms and sources important?
To increase energy costs
To reduce environmental impact
To limit energy access
To ignore energy conservation
Which type of energy supports telecommunications infrastructure?
Mechanical energy
Electrical energy
Chemical energy
Thermal energy
What does renewable energy contribute to sustainable development?
Increased greenhouse gas emissions
Decreased energy efficiency
Environmental conservation
Dependency on fossil fuels
What is energy, and why is it essential in daily life?
Energy is the capacity to do work and exists in multiple forms such as mechanical, thermal, and electrical energy. It is essential in daily life because it powers transportation, provides electricity for lighting and heating, supports industrial processes, and enables communication and healthcare services. Understanding energy helps optimise its use, promotes sustainability, and drives technological advancements.
What distinguishes renewable energy sources from non-renewable ones?
Renewable energy sources are derived from naturally replenishing resources like sunlight, wind, and water, ensuring their availability over the long term. In contrast, non-renewable energy sources such as fossil fuels (coal, oil, natural gas) are finite and depleted with use. Renewable energy promotes environmental sustainability by reducing greenhouse gas emissions and dependency on finite resources compared to non-renewable sources.
How does energy impact various sectors such as transportation and industry?
Energy powers transportation by fueling vehicles and aeroplanes, facilitating movement of goods and people. In industry, it supports manufacturing processes, machinery operations, and heating/cooling systems, contributing to production efficiency and economic growth. Effective energy management in these sectors enhances productivity, reduces operational costs, and supports sustainable development goals by minimising environmental impact.
What role does electrical energy play in modern society?
Electrical energy is indispensable in modern society as it powers electronic devices, lighting systems, and essential infrastructure such as telecommunications and healthcare facilities. It enables technological advancements, supports digital connectivity, and enhances quality of life by providing reliable access to services and information. Electrical energy's versatility and efficiency make it a cornerstone of economic development and societal progress.
Why is understanding the distinction between renewable and non-renewable energy crucial for sustainable development?
Understanding the distinction between renewable and non-renewable energy sources is crucial for sustainable development as it informs energy policy decisions, investment in infrastructure, and environmental conservation efforts. Promoting renewable energy sources reduces reliance on finite resources, mitigates environmental degradation associated with fossil fuel extraction and combustion, and fosters resilience against climate change impacts. Embracing renewable energy technologies contributes to energy security, economic stability, and global efforts to achieve carbon neutrality and sustainable development goals.