Objective: To bring a pot of water to a boil.

Which of the following solutions is more sound in terms of naive physics reasoning?

[-] Place the pot with the water on the stove and turn the stove up to the highest heat. Let the water heat up until there is a constant stream of large bubbles disturbing the water.;
[-] Place the pot with the water on the stove and turn the stove up to the highest heat. Let the water heat up until you hear a low thrumming noise, and the water turns a light green color.;
Place the pot with the water on the stove and turn the stove up to the highest heat. Let the water heat up until there is a constant stream of large bubbles disturbing the water.