Orders of Magnitude Application

Application |  |
| This web based application requires students to take measurements, do metric conversions, use the correct number of significant digits, and think about the problems of taking measurements.
Background Information
| The SEM Microscope
| The pictures you will see were taken with a SEM microscope or scanning electron microscope. The Scanning Electron Microscope creates magnified images by using electrons instead of light waves. The SEM shows very detailed 3-dimensional images at much higher magnifications than is possible with a light microscope. The possible magnifications range from 15x to 200,000x.
| The Nanowires
| The nanowires are formed on a sample substrate out of ZnO, Zinc Oxide. One potential application of the naowires is to make solar collector cells. Using a special coating, the nanowires convert the photons of sunlight directly into electrons or electricity. The fact that the nanowires are extremely small and numerous means that they have a lot of surface area. This allows them to capture a greater percentage of the sunlight falling on them.
| The Orders of Magnitude worksheet can be accessed below in Word format. In order to fill out the worksheet, students need to take measurements from the Orders of Magnitude application which can be run below by clicking on Run Application. The application requires the Flash player to run.
|  |  | Word Worksheet |
|  |  | Run Application |

Software developed by Multimedia Science - www.multimediascience.com

Insturctor's Sample Answer Key |
| A sample answer key is provided in Word format below.
|  | Word Worksheet Answer Key |