Measurement- 2 - Free MCQ Practice Test with solutions, Class 4 Mathematics

The standard unit of length based on the metric system is a meter (m). According to the length that needs to be measured, we can convert a meter into various units like millimeters (mm), centimeter (cm), and kilometer (km).

To convert the length of the rod from metres to centimetres, we use the conversion factor where:

• 1 metre = 100 centimetres

Therefore, multiplying:

• 5 metres × 100 = 500 centimetres

Liquid volume is typically measured using specific tools like a graduated cylinder or buret in milliliters (mL) or liters (L).

Small amounts of liquid are measured in milliliters (mL)

The second (s) is the base unit of time in the International System of Units (SI). It measures time and distinguishes it from other physical quantities. These quantities have their own distinct units, including:

• Capacity: measured in litres
• Length: measured in metres
• Mass: measured in kilograms

A Clock is used to measure time.

Ancient measurement of length was based on the human body, for example the length of a foot, the length of a stride, the span of a hand, and the breadth of a thumb. There were unbelievably many different measurement systems developed in early times, most of them only being used in a small locality.

The hand span, foot span, cubit, pace, and arm span are the five nonstandard units for measuring length.

1 minute = 60 seconds. 

1 hour = 60 minutes. 

The liter (L) is the basic metric unit for measuring liquid volume. A milliliter (mL) is the metric unit to measure liquid in very small containers.

She should use Clock with a second hand to measure time.