Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content. Carbon-14, or radiocarbon, is a naturally occurring radioactive isotope that forms when cosmic rays in the upper atmosphere strike nitrogen molecules, which then oxidize to become carbon dioxide.
1. Decide on the square footage of the room you will be adding to your home. Room additions can cost up to 50 percent higher, between $80 and $130 per square foot before considering wiring and plumbing, than that same room had been constructed with the rest of the house, according to the Home Addition Plus website.oom additions can cost up to 50 percent higher, between $80 and $130 per square foot before considering wiring and plumbing, than that same room had been constructed with the rest of the house, according to the Home Addition Plus website.
Family Room. The average cost of a family room addition nationally is $79,000. This cost includes adding a 16-by-25 foot room, fiberglass insulation, vinyl siding, pre-finished hardwood flooring and atrium-style exterior doors.unroom. The average cost of a sun room nationally is $72,000. The cost includes a 200-square-foot slab addition, vinyl or aluminum awnings, casement windows and screens.