A layer of hot rock. The upper most part of the mantle and the crust together form a rigid layer. Like a road tar softened by the heat of the sun, this part of the mantel is somewhat soft - it can bend like plastic. Is a layer of molten metal that surrounds the inner core. Is a dense ball of solid metal.
In many countries, including Canada, having smoke and carbon monoxide detectors in the house is the law. The reason is simple: these alarms save lives. Many house fires occur at night. If there is no smoke detector, those sleeping in the house may not notice the fire and will be overwhelmed by smoke.
How to Test your Detector. Most carbon monoxide detector models have a test button directly on the unit. Pressing this button tests the alarm as to whether or not the audible warning is operational. However, the test button will not provide you an indication of the unitâs condition.our carbon monoxide detector manual will give you the details of the testing schedule. In general, the detectorâs alarm should be tried on a weekly basis by pushing the test button to ensure its function.