Topic 1.1: Measurements

Question 1

How many significant figures should you approximate everyday quantities to?

Answer 1

1 or 2 significant figures

Question 2

What are fundamental units?

Answer 2

Units that can not be expressed in simpler units

Question 3

What are the 6 fundamental units IB needs?

Answer 3

1. length - metre - m
2. mass - kilogram - kg
3. time - second - s
4. temperatue - kelvin - k
5. current - ampere - a
6. amount of substance - mol - mol

Question 4

What are derived units?

Answer 4

Units that are made of 2 or more fundamental units (e.g., ms-1)