Ima

Definition:

What are Physical Quantities?

Physical quantities are things that we can measure.They tell us how big, how long, how heavy, or how hot something is.

Examples of Physical Quantities:

• Length – how long something is

• Mass – how heavy something is

• Time – how long something takes

• Temperature – how hot or cold something is

A physical quantity has two parts:

1. A number

2. A unit

Example:

• 5 metres

• 2 kilograms

Measurement Techniques:

Measurement techniques are the ways we use tools to measure physical quantities.

Common Measuring Tools:

• Ruler or measuring tape – used to measure length

• Weighing scale – used to measure mass

• Clock or stopwatch – used to measure time

• Thermometer – used to measure temperature

Example:

• We measure a pencil using a ruler

• We measure milk using a measuring cup

• We measure body temperature using a thermometer.

Fun Fact:

Without measurement, we cannot build houses, cook food, or do science experiments!