Candle Combustion Experiment: Demonstrating Oxygen Depletion in a Closed System #3574121 (License: Personal Use)

This black-and-white line illustration depicts a controlled combustion experiment: a lit candle sits inside a glass beaker, and a hand is inserting a flat card vertically to partially seal the system. As the candle burns, it consumes oxygen, and the rising smoke and flame behavior indicate gas dynamics and eventual flame extinguishment due to lack of O₂. The setup is commonly used to teach principles of combustion, gas laws, and conservation of mass in middle and high school science curricula.

Used in educational web pages, lesson plans, or STEM resource sites to explain combustion, atmospheric gases, and experimental design; matches user intent for visual aids in teaching basic chemistry concepts.