| A | B |
| altimeter | instrument that measures height |
| diameter | straight line through the center of a circle |
| kilometer | a unit of length equal to 1000 meters |
| metronome | instrument marking time in steady beats |
| odometer | instrument measuring distance traveled |
| barometer | instrument measuring atmospheric pressure |
| geometry | a branch of mathematics that deals with points, lines, angles, surfaces, and shapes |
| metric | referring to a system of measurement |
| micrometer | instrument measuring very small distances |
| perimeter | the boundary length of a geometrical figure |