Lesson Plan: B1.1.08

Hamble Lesson Observation Plan
Learning About
How is the cross-sectional area of a zone of inhibition calculated?
Keywords:
  • Standard form : a system of writing very large or very small numbers to make it more manageable. (1)
  • Cell division : the division of a cell into two daughter cells with the same genetic material. (1)
  • Population : a community of animals, plants, or humans among whose members interbreeding occurs. (1)
  • Area : the total surface of an object. (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)		 Stepping Stones Pitstop Check
(Thinking Map)
(Biology only) Students should be able to calculate cross-sectional areas of colonies or clear areas around colonies using πr². (Biology only) How would the cross-sectional areas of colonies or clear areas around colonies be calculated? How can this be used to calculate the cross-sectional area for a radius of 0.25 mm?
(Biology only) Students should be able to calculate the number of bacteria in a population after a certain time if given the mean division time. (Biology only) How is the number of bacteria in a population calculated after a certain time if given the mean division time?
(Biology only) Students should be able to express the answer in standard form. (Biology only) What is the population of bacteria, which have a mean division time of 5-minutes, after 45-minutes if starting with just 5 bacteria? How would this answer be shown using standard form?

Review and use agar plates from AQA Biology Required Practical 2 - Microbiology to calculate cross-sectional areas
Links To the Big Ideas
ForcesParticlesEnergyCells