| __ | 1. | Instrument | | A. | Amount of matter in an object, usually measured in grams. |
| __ | 2. | Mass | | B. | A device used to record, measure or control something. |
| __ | 3. | Remotely Operated Vehicle ROV | | C. | An unmanned vehicle used to explore. |
| __ | 4. | Sink | | D. | A vehicle used to explore underwater. |
| __ | 5. | Sonar | | E. | A pole or weighted line used to measure the depth of liquid |
| __ | 6. | Sounding | | F. | A system that uses sounds waves to find objects. |
| __ | 7. | Sound Navigation and Ranging | | G. | Amount of space an object takes up. |
| __ | 8. | Submersible | | H. | Detailed drawing of physical features of a space. |
| __ | 9. | Topography | | I. | Sonar |
| __ | 10. | Volume | | J. | To Fall to the bottom of liquid. |