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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Answer in one line - Answer Key

One inch is approximately equal to 2.54 centimetres.

Food adulteration is primarily done to increase profits by increasing the quantity and sometimes enhancing the appearance or shelf life of the product.

The standard metre and standard kilogram are kept at the National Physical Laboratory in New Delhi.

A ruler is generally smaller than a metre scale, which is typically 1 metre long.

Grams and milligrams are used to measure the mass of lighter bodies.

No, a person cannot be without mass even if there is no gravity, as mass is the quantity of matter in the body, while weight is dependent on gravity.

There are 12 inches in one foot.

To measure the diameter of a ball, place it between two wooden blocks on a table such that the inner edges of the blocks are parallel and touch the ball, then use a ruler to measure the distance between the inner edges of the blocks.

The SI unit for time is the second.

The conversion factor between grams and milligrams is 1 gram = 1000 milligrams.

The scientific term for the quantity of matter contained in a body is mass.

There are 10 millimetres in 1 centimetre.

The ‘Tare’ button on an electronic balance sets the balance to weigh anything placed into the container but does not weigh the container itself, effectively zeroing out the container’s mass.

Submultiples of the metre are centimetre (cm) and millimetre (mm).

Chemicals should not be placed directly on the balance pan because they can react with the pan material and cause corrosion.

One traditional unit for measuring gold in India is Tola (or Ratti).

The lead seal on standard weights is a mark of approval from the Weights and Measures Department, ensuring the weight is correct and preventing dishonest practices.

When measuring width, height, or depth, you are essentially measuring length.

Measurement helps us determine quantities like distance, amount of goods, or liquid volume needed for various day-to-day activities.

People stopped using body parts for measurement because their lengths varied from person to person, leading to inconsistent and different results.

1 metre is equal to 100 centimetres.

Two key components of a beam balance are the horizontal beam and the two identical pans.

The two types of adulteration that occur due to human action are intentional adulteration and metallic adulteration.

One traditional unit for measuring grains by volume in India is Seer (or Maund).

To find the approximate area of a regular shape using graph paper, you count incomplete squares that are more than half covered by the outline and ignore those that are less than half.

If the zero mark is not visible, you should start measuring from another clear mark (e.g., 1 cm) and then subtract that initial reading from the final reading at the other end of the object.

A glass filled with milk feels lighter because the quantity of matter (milk) in it, and thus its mass, is less than that in a jug filled with milk.

According to the virtual tour video, two body parts historically used for measuring things are the foot and the cubit.

It is important to place the ruler as close as possible to the object to ensure the measurement is accurate and to minimize errors.

To convert millimetres (mm) into centimetres (cm), the number of mm is divided by 10.

The conversion factor between kilograms and grams is 1 kilogram = 1000 grams.

One traditional unit for measuring land in India is Bigha (or Acre).

To convert kilometres (km) into metres (m), you multiply the number of km by 1000.

Buying fruits/vegetables involves measuring mass, while buying cloth involves measuring length.

When weighing potatoes on a beam balance, the beam becoming horizontal and the pointer aligning vertically indicates that the mass of the potatoes is equal to the standard weight.

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