This worksheet is a assessment of how well students know what various scientific tools are used for. There are 12 tools listed (such as measuring cup, ruler, microscope, etc.) and students have to sort them based on their use (such as tools used to measure weight, length, etc.). Also, an answer key is provided. It is geared for 3rd graders and meets Georgia Performance (GPS) standards for science. If your school uses the GA edition of the HarcourtÃ‚Â© science book, it goes with chapter 1.