Test: Measurement- 1 - Class 4 MCQ

A thermometer is an instrument that measures temperature. It can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air. 

Capacity is measured in the SI base unit called litres (L). The most common units for capacity are litre (L) and millilitre (mL).

Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up.

The standard unit of measuring length is a meter. It is done by a ruler. 

To convert grams to kilograms, we use the conversion factor where 1 kilogram (kg) is equal to 1000 grams (g).

Therefore, to find how many kilograms 125 grams is, we divide by 1000. The calculation is as follows:

• 125 g = 125 / 1000 kg
• This simplifies to 0.125 kg.

Thus, 125 grams is equal to 0.125 kilograms.

• The first statement is correct as kg is used for mass.
• The second statement is incorrect because time should be measured in seconds, minutes, or hours, not cm.
• The third statement correctly uses cm to measure height.
• The fourth statement correctly uses liters for capacity.

The distance between two cities like Delhi and Mumbai is measured using kilometers because it's a standard unit for large distances. Using smaller units, such as centimeters or millimeters, would be impractical for such measurements.

1 is incorrect because the cubit, generally taken as equal to 18 inches (457 mm), was based on the length of the arm from the elbow to the tip of the middle finger and was considered the equivalent of 6 palms or 2 spans. 

2 is incorrect because long distance is measured in kilometres. 

3 is incorrect because time is measured in seconds, minutes or hours. 

4 is correct because short length is measured in centimetres(cm).

The metre wasn't used in ancient times, as it was introduced in 1795 with the metric system.

Early units of measurement included:

• Cubit
• Stride
• Footspan

As you may already know Litre, most commonly spelled as Liter, is a metric system unit for volume. 

Hence, Quantity of water in bottle  can be measured in litre.