Question 1: Define the term 'trend in energy resource use' and explain why analyzing such trends is important for society.

Answer: A trend in energy resource use refers to the pattern or direction of how the consumption of different energy resources changes over time. Analyzing these trends helps society plan for sustainable energy use, reduce environmental impact, and make informed decisions about future energy needs.

Question 1: What is renewable energy, and how does its trend of use differ from non-renewable energy sources?

Answer: Renewable energy comes from sources that can be replenished naturally, such as solar, wind, and hydro power. Its use trend is generally increasing as societies shift toward sustainable options, whereas non-renewable energy, like coal and oil, often show declining or plateauing trends due to environmental concerns.

Question 1: Between 2010 and 2020, the consumption of coal decreased from 40% to 25% of the total energy consumed worldwide, while renewable energy increased from 10% to 30%. What does this indicate about global energy trends?

Answer: This indicates a significant shift from fossil fuels like coal toward renewable energy sources, reflecting efforts to reduce environmental impact and adopt sustainable energy practices.

Question 1: If the global energy consumption was 600 exajoules in 2010 and increased by 2% annually, what was the total energy consumption in 2015? Show your calculation using the formula: Final amount = Initial amount × (1 + rate)^years.

Answer: Final amount = 600 × (1 + 0.02)^5 = 600 × 1.10408 ≈ 662.45 exajoules

Question 1: Describe a simple experiment to compare the efficiency of solar panels and wind turbines in generating electricity. Include the variables you would control and safety precautions to consider.

Answer: An experiment can involve measuring the amount of electricity generated by a solar panel and a wind turbine under similar environmental conditions. Variables to control include sunlight intensity, wind speed, and panel/turbine size. Safety precautions include ensuring proper electrical insulation, avoiding contact with moving parts, and conducting the experiment in a safe, open area.

Question 1: How have technological advancements influenced the increasing trend of renewable energy use in recent years?

Answer: Technological advancements have improved the efficiency and reduced costs of renewable energy technologies like solar panels and wind turbines, making them more accessible and attractive for widespread use.

Question 1: Explain how the shift toward renewable energy sources affects industries that traditionally relied on fossil fuels.

Answer: Industries relying on fossil fuels may need to adapt by investing in renewable technologies, which can lead to changes in manufacturing processes, job opportunities, and environmental benefits, while reducing pollution and carbon emissions.