(a) Here are three reasons why the laboratory technician advised students to use a non-luminous flame when heating chemicals:
i. Controlled Temperature: A non-luminous flame produces a hotter and more consistent temperature compared to a luminous flame. This is essential when heating chemicals accurately and safely, as fluctuations in temperature can lead to inaccurate results or even accidents.
ii. Reduced Smoke Production: Non-luminous flames are cleaner and produce less soot and smoke than luminous flames. This creates a safer and more pleasant working environment in the laboratory, minimizing the risk of contaminants affecting experimental results.
iii. Better Visibility: Using a non-luminous flame allows the technician and students to observe the reactions and processes clearly. A luminous flame can obscure the view, leading to potential mistakes in monitoring chemical reactions or measuring substances.
(b) Here are four points to convince people that solving problems using scientific procedures is not a waste of time and money:
i. Evidence-Based Decision Making: Scientific procedures rely on empirical evidence and systematic investigation, which leads to more informed and effective decisions. This reduces the likelihood of costly mistakes that can arise from guesswork or anecdotal approaches.
ii. Innovation and Improvement: Many advancements in technology, medicine, and everyday conveniences stem from scientific research. By applying scientific methods, we can develop better products and solutions that improve quality of life and drive economic growth.
iii. Resource Efficiency: Scientific methods often help in optimizing the use of resources, whether in production, energy consumption, or environmental protection. By addressing problems scientifically, we can save money in the long run by reducing waste and enhancing efficiency.
iv. Solving Societal Challenges: Many of today’s pressing issues, such as climate change, health crises, and food security, require scientific approaches to find viable solutions. Investing in science can lead to sustainable practices that benefit society as a whole, making it a valuable expenditure rather than a waste.