Final answer:
Distance can be measured using rulers for small objects, GPS units for geocaching and large distances, and ultrasonic 'measuring tapes' for room dimensions or automation in devices.
Step-by-step explanation:
Three devices that can measure distances at different scales include a short ruler calibrated in millimeters, a GPS unit with a unit scale for larger distances, and ultrasonic 'measuring tapes' which can measure room dimensions or the distance between objects by timing ultrasonic echoes. To measure the length of a street, you could use a measuring wheel or a GPS device, which can provide measurements in both metrics and customary units. Meanwhile, a small worm's size can be precisely measured using a short ruler with millimeter increments. For distances from one town to the next, a car's odometer or GPS unit would be appropriate, providing measurements in kilometers or miles. The height of a light switch and the width of a refrigerator could be measured using a tape measure or a ruler in either centimeters or inches.