Answer key

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Last edited 26 days ago by Learn LoopHQ.

Chapter: 02. Physical Quantities And Measurement 1

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Fill in the blanks - Answer Key

Mass is the quantity of matter contained in a body whereas weight is the force of gravity exerted on the body due to its mass.

The error that occurs due to incorrect positioning of the eye while taking measurements is known as parallax error.

The National Physical Laboratory (NPL), New Delhi is responsible for maintaining the national standards for all the basic units in India.

The SI unit to measure length is metre.

Cubic metre is the SI unit to measure volume.

The space occupied by a flat surface is called its area.

The International System of Units is more commonly known as the SI units.

To measure the mass of heavier bodies, we use quintal and metric ton.

A metre scale has 100 divisions, each equal to 1 centimetre.

The hole in proper standard weights is filled with lead and stamped by the Weights and Measures Department.

To convert centimetres (cm) into metres (m), the number of cm is divided by 100.

Every measurement value consists of two parts: the numerical value and the unit of measurement.

Food adulteration can be intentional, incidental, or metallic.

The area of regular shapes can be determined by using a graph paper.

The most common instruments used to measure length are the ruler, the metre scale, and the measuring tape.

The standard unit of area in SI system is square metre or metre square.

Length can be defined as the distance between any two points or places.

Mass is usually measured by using appropriate balances.

A quantity that can be measured is called a physical quantity.

The standard unit of mass in SI system is kilogram.

The comparison of an unknown quantity with a known fixed quantity of the same kind is called measurement.

The electronic balance provides a direct digital display of the mass of the object and is very accurate.

The quantity of matter in a body determines its mass.

To measure the distance between two towns, a bigger unit like kilometre is needed.

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