Quartz is so hard that it will easily make a deep scratch in glass. Even if you press hard, a meteorite will at best only make a weak scratch mark. (Use a sharp edge of the rock.) In the photo above, the top scratch was made with a quartz crystal. The next mark was made with a piece of chert, which is another form of quartz. The two scratches at the bottom were made with ordinary chondrites (click on image for enlargement of bottom portion).
tomography. any method that produces images of single tissue planes. In conventional radiology, tomographic images (body-section radiographs) are produced by motion of the x-ray tube and film or by motion of the patient that blurs the image except in a single plane.
Digital Infrared Thermal Imaging, or Thermography is a non invasive test of physiology (the science that deals with the functioning of the organism and its parts). It is a valuable procedure for alerting your doctor to changes that can indicate early stage breast disease and in the evaluation of unexplained pain.n 1982 the FDA (Food and Drug Administration) approved breast thermography as an adjunctive diagnostic breast cancer screening procedure. Thermography is not only used in medical applications, but also in industry, veterinary medicine, and dentistry.