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Metric System History

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Questions and Answers

What is the basic unit of length in the metric system?

Meter

What is the basic unit of mass in the metric system?

Gram

What is the concept of hour, minute, and second based on?

Rotation of the Earth

What is the working standard for mass in the metric system?

Platinum-iridium cylinder Signup and view all the answers

What was the international treaty signed in 1875 to promote the metric system worldwide?

Metre Convention Signup and view all the answers

What are the two widely used systems for measurement besides the metric system?

CGS and MKS systems Signup and view all the answers

Why is a unit necessary in measurement?

To express the result of measurement in a meaningful and unique way. Signup and view all the answers

What is the value of a physical quantity?

The product of the number of times the standard unit is used and the quantity being measured. Signup and view all the answers

Explain the importance of knowing the measuring standard.

It helps in interpreting the measurement result correctly. Signup and view all the answers

How is the result of a measurement expressed?

In terms of a value using a specific unit. Signup and view all the answers

What is meant by the term 'unit' in measurement?

It refers to the defined quantity used as a scale for measuring. Signup and view all the answers

Why is it important to specify the unit when expressing a measurement?

To avoid ambiguity and ensure the measurement is accurately understood. Signup and view all the answers

Why is measurement considered a basic skill?

Measurement is a basic skill because it forms an essential part of our day-to-day activities. Signup and view all the answers

What is the process of measurement?

Measurement is a process of comparison and involves counting the number of times a chosen scale is used. Signup and view all the answers

What are the characteristics of a useful unit of measurement?

A useful unit must be relevant to the quantity being measured, convenient, and well defined. Signup and view all the answers

Why were parts of the human body not suitable for measurement in ancient times?

Parts of the human body were arbitrary, non-uniform, and led to conflicts and confusions in measurement. Signup and view all the answers

What is the international system of units called?

The international system of units is called SI units. Signup and view all the answers

How are units for other physical quantities derived in the SI system?

Units for other physical quantities are derived in terms of the base SI units. Signup and view all the answers