Chapter 1 : Measurement

Question 1

What is a physical quantity?

Answer 1

Physical quantities are quantity that can be measured or calculated and consists of a numerical magnitude and an unit.

Question 2

Name some examples of physical quantities.

Answer 2

• Distance
• Height
• Loudness
• Mass
• Sound energy
• Time
• Volume
• Weight

Question 3

What are the 7 base quantities?

Answer 3

1. Time (s)
2. Mass (kg)
3. Distance (m)
4. Temperature (K)
5. Current (A)
6. Luminosity (cd)
7. Amount of substance (mol)

Question 4

What are Prefixes?

Answer 4

Prefixes are used to represent very big or very small numbers. They are added in front of a unit. (E.g. kilogram (kg))