2. Part A.1. If you have a properly adjusted hot flame, which is pale blue with three distinct cones, what is observed if the air-control valve is slightly closed? Explain. 3.A burning candle produces a luminous flame. What is the fuel for the burning candle? Why is the flame luminous? - The fuel for the burning candle is oxygen. With an insufficient supply of oxygen, small carbon particles are produced, which, when heated to incandescence, produce a yellow, luminous flame. The combustion products may, in addition to carbon dioxide and water, include carbon monoxide.
Most earthquakes occur at the boundaries of tectonic plates. And i think Most earthquakes occur along the edge of the oceanic and continental plates. The earth's crust (the ou â¦ ter layer of the planet) is made up of several pieces, called plates.
Most earthquakes occur on plate boundaries for a variety of reasons. When plates in the earth's crust move, they scrape or bump each other on the edges and boundaries. Therefo â¦ re, the movements of the plates are more likely to be felt along the edges, where all of the activity takes place.olcanoes usually occur along the boundaries of tectonic plates but they can also occur far from any boundary, over a 'hot spot'. The Hawaiian Islands are a string of volcanoe â¦ s that formed as the Pacific Plate slowly moved over a hot spot.