Length Reading draws a centimeter or inch ruler with an object lying along it: marbles, a rock, a cube or a metal cylinder. You type the object’s length and where its left end sits, and students measure it from the ruler, either lined up with 0 or starting partway along so they have to read both ends and subtract.
On a metric ruler, lengths can go one estimated digit past the smallest mark, for significant figures practice, or land on the nearest mark. An inch ruler is read in fractions of an inch. Magnifiers on the object’s ends keep the marks readable in print, and the answer key prints the length, and both ends when the object doesn’t start at 0.
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Read to the smallest mark, then estimate one more digit. On a ruler marked in millimeters, that means reading to 0.01 cm, like 4.37 cm. On a ruler marked only every centimeter, read to 0.1 cm.
Yes. Type where its left end sits, or drag the object along the ruler in the figure. Students then read both ends and subtract, and the answer key gives both ends as well as the length.
A marble or a rock touches the ruler below its widest point, so its ends sit above the marks they line up with. The dashed lines drop from each end down to the ruler to show where to read.
Yes. Choose Imperial (in). Lengths land on a mark and are read as fractions of an inch, down to 1/16 in on the finest ruler.
Chemistry Figures Length Reading