Understanding Word Analogies: Mass and Volume Units

The question presents a word analogy: Mass : Kilogram : : Volume : ?. This type of question tests your ability to identify the relationship between the first pair of words and apply the same relationship to the second pair to find the missing word.

Analyzing the Analogy: Mass and Kilogram

In the first part of the analogy, "Mass : Kilogram", we see that Kilogram is a standard unit used to measure Mass. Specifically, the kilogram (kg) is the base unit of mass in the International System of Units (SI).

So, the relationship is: Quantity : Unit of Measurement.

Applying the Analogy to Volume

Following the same relationship, the second part "Volume : ?" requires us to find a standard unit of measurement for Volume. We need to look at the given options to see which one represents a unit of volume.

Evaluating the Options for Volume Units

Let's examine each option:

• Option 1: Joule

  The joule (J) is the SI unit of energy and work. It is not a unit of volume.

• Option 2: Litre

  The litre (L or l) is a metric unit of volume. While not an SI base unit (the cubic metre, m³, is the SI derived unit for volume), the litre is commonly used for measuring volumes of liquids and gases and is accepted for use with the SI.

• Option 3: Degree

  A degree (°) can be a unit of angle (e.g., degrees of arc) or temperature (e.g., degrees Celsius or Fahrenheit). It is not a unit of volume.

• Option 4: Volt

  The volt (V) is the SI unit of electric potential difference (voltage). It is not a unit of volume.

Determining the Correct Unit for Volume

Based on the analysis of the options, the Litre is the only unit listed that measures Volume. Therefore, the relationship Mass is measured in Kilogram is analogous to Volume is measured in Litre.

Thus, the complete analogy is Mass : Kilogram : : Volume : Litre.

Revision Table: Common Quantities and Units

Additional Information on Units of Measurement

Units of measurement are crucial in physics and everyday life. They provide a standard way to quantify physical quantities like Mass, Volume, Length, and Time. Different systems of units exist, but the International System of Units (SI) is the most widely used system for science and commerce.

• SI Units: The SI system is built upon a set of base units (like the metre for length, kilogram for mass, second for time, ampere for electric current, kelvin for thermodynamic temperature, mole for amount of substance, and candela for luminous intensity) and derived units (like the newton for force, joule for energy, and volt for electric potential).
• Metric System: The metric system is a system of measurement that includes units like the metre, gram, and litre. The SI is the modern form of the metric system.
• Non-SI Units: Many non-SI units are still commonly used, such as the litre (for volume), minute/hour (for time), and degree Celsius (for temperature). It's important to be familiar with common conversions between different units and systems.