"If you cut 2 cm off the end of a ruler and then measure with it starting from that end your measurements will be short by 2 cm. This would be a zeroing error. Usually such errors are smaller than the least count (the smallest division) of the instrument and can be avoided by starting from a point on the continuous part of the scale, for example, from the 10 cm mark. Then, if the other end of the object came to 24.3 cm, the object would be (24.3-10.0) = 14.3 cm long. Get a ruler with a millimeter scale and measure several objects, but don't use either end of the scale as a starting point. Note the object names and measurements in the table below following the example given."

Find a common household object not more than 30 cm long and measure its length. In the space below, record the type of object, the position of the left end of it, the position of the right end of it and its length.