Learning Objectives
To learn how to make estimates
How to use orders of magnitude.
Use concepts to recognise whether answers are reasonable.
Carry out back of the envelope calculations.
Syllabus Statements
Orders of magnitude
Estimate of approximate values for physical quantities;
Key Questions
What is the point of making estimates?
Why do we make comparisons?
What are orders of magnitude?
Key Words
Estimate, comparison, order of magnitude, scale, size