w the boiler keeps the school warm. The first thing he mentioned was the blue pipe that carries natural gas to the boiler to fuel the fire. Then the fire heats the water so it is boiling. Next the water evaporates into the white pipes as steam. The white pipes carry the steam to the all the parts of the school to warm it up. He can shut off the pipes to the boiler using the shut-off valves so when it is not working then someone can fix it safely. When we got back to class, we wrote about the process of heating the school using a boiler.
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