Tape and rod measure length like a scale but are more flexible and suited for different contexts. “Char angula” refers to an old measurement unit, meaning “four fingers” or roughly 7-10 cm, used in traditional contexts.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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The meter is convenient for measuring lengths like a railway track, but not for smaller measurements such as the thickness of a book page. For small lengths, units like millimeters are more precise.
If the ends of the scale are broken, measure from a known reference point to a point along the scale. Use a piece of string or another ruler to measure the length accurately from these points.
If everyone uses the same meter scale and reads it correctly, the results should be consistent. Differences arise from using various scales or incorrect readings, but a standard meter scale ensures uniform measurements.
When reading a scale, position your eye perpendicular to the scale’s markings to avoid parallax error. This ensures accurate measurement by aligning your line of sight directly with the scale’s markings.