18 Questions
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
What was the international treaty signed in 1875 to promote the metric system worldwide?
Metre Convention
What are the two widely used systems for measurement besides the metric system?
CGS and MKS systems
Why is a unit necessary in measurement?
To express the result of measurement in a meaningful and unique way.
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.
Explain the importance of knowing the measuring standard.
It helps in interpreting the measurement result correctly.
How is the result of a measurement expressed?
In terms of a value using a specific unit.
What is meant by the term 'unit' in measurement?
It refers to the defined quantity used as a scale for measuring.
Why is it important to specify the unit when expressing a measurement?
To avoid ambiguity and ensure the measurement is accurately understood.
Why is measurement considered a basic skill?
Measurement is a basic skill because it forms an essential part of our day-to-day activities.
What is the process of measurement?
Measurement is a process of comparison and involves counting the number of times a chosen scale is used.
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.
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.
What is the international system of units called?
The international system of units is called SI units.
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.
Explore the history of the metric system and its defining factors like the definition of the meter and mass unit.
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