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CNMS ICSE - 7 Std
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Key Terms

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Chapter: 01. Physical Quantities And Measurement

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Measurement: The comparison of an unknown quantity with a known fixed quantity of similar nature.
Volume: The three-dimensional space occupied by a substance (solid, liquid, or gas).
Unit cube: A cube whose sides are 1 unit long.
Capacity: The internal volume of a container.
Meniscus: The curve formed on the surface of liquids when they are poured in a measuring cylinder.
Concave meniscus: A downward curve formed on the surface of liquids that wet the sides of the measuring cylinder.
Convex meniscus: An upward curve formed on the surface of liquids that do not stick to the sides of the measuring cylinder.
Area: The amount of surface covered by an object or a place.
Density: The quantity of mass per unit volume of a substance.
Speed: The distance travelled by an object per unit time.
Overflow jar: A metal or a glass jar with an overflow outlet.
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