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LESSON 2.  Measuring Skills (Lab)

Comparing and contrasting objects requires measuring their properties.  Measurements used in  beginning science labs should include linear measurements, volume, mass, weight, temperature, and time.  Measurement is relative and until standards were created, measurement was close or accurate, but very difficult to be precise.  Many times in scientific literature you will see a term “plus or minus,” referring to a margin of error, inherent in measuring systems.

Linear measurements such as length, width, or height are measured using various equipment like a ruler (metric or English), a tape measure, or can be calculated by mathematical relationships.

Rulers come in many forms, but they only measure something linear or represented in two dimensions.  A caliper ruler can measure both internal and external dimensions of an object.    However, it is difficult to measure something in three dimensions.  A tape measure can actually measure three dimensions, but sometimes it is difficult and time consuming.   Mathematical calculations make it easy!

 Caliper ruler measuring inside of box Caliper ruler measuring outside of box
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