Units of Measurement Conversion between metric and English units. 1 meter (m) = 39.4 inches = 1.09 yards; 1 yard = 0.92 m 1 centimeter (cm) = 0.39 inches; 1 inch = 2.54 cm 1 millimeter (mm) = 0.039 inch = 39/1,000 inch; 1 inch = 25.4 mm 1 micrometer or micron (um) = 0.000039 inch = 39/1,000,000 inch; 1/1000 inch = 25.4 um
The most important characteristics to consider when identifying Index Fossils: ABUNDANCE: To best allow paleontologists to correlate rocks with other rocks found at locations far apart, it's important that the index fossil be very widely distributed across a vast geographical region.
The importance of mounting medium refractive index. If you want to observe a specimen under the microscope, then you have to add a mounting medium. The mounting medium is important for several reasons. Of course it stabilizes and preserves the specimen. But at least equally important are the optical characteristics.The refractive index (RI) of the mounting medium can have a significant impact on the image quality.he mounting medium is important for several reasons. Of course it stabilizes and preserves the specimen. But at least equally important are the optical characteristics. The refractive index (RI) of the mounting medium can have a significant impact on the image quality.