Biology Year 12 - Module 7 - Lesson 4
Modes of Transmission
1. Key Ideas
In 1854, John Snow stopped a cholera epidemic by removing a single pump handle — before anyone knew what cholera was. His method of mapping cases to a source is still how epidemiologists trace outbreaks today.
- The three modes of transmission: direct contact, indirect contact, vector
- Why the transmission route determines the public health response
2. Success Criteria
By the end, you should be able to:
- The three modes of transmission: direct contact, indirect contact, vector
- Examples of diseases transmitted by each mode
- How epidemiologists investigate transmission during an epidemic
3. Key Terms
4. Activity: Build the Lesson Map
Use the lesson to complete the table. Keep answers brief but specific.
| Prompt | Your answer |
|---|---|
| Main concept | |
| Important example | |
| Common mistake to avoid | |
| How this links to the next lesson |
5. Short Answer Questions
1. Explain this lesson goal in your own words: "The three modes of transmission: direct contact, indirect contact, vector". Use one specific example from the lesson.
2. Apply this idea to a new example: "Examples of diseases transmitted by each mode". Show your reasoning clearly.
3. Analyse why this idea matters for understanding Modes of Transmission: "How epidemiologists investigate transmission during an epidemic".
6. Extend: Apply the Idea
A student gives a memorised answer about Modes of Transmission but does not use evidence or reasoning.
Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.
7. Multiple Choice
1. What is the best first step when answering a question about Modes of Transmission?
A. Identify the key concept being tested
B. Write every fact from memory
C. Ignore the command word
D. Skip examples and evidence
2. Which answer would show stronger understanding of Modes of Transmission?
A. An answer with accurate terms and reasoning
B. A copied definition only
C. A single-word response
D. An answer with no example
3. What should you do if a question asks you to explain?
A. Link the idea to a reason or cause
B. List unrelated facts
C. Only draw a diagram
D. Write the shortest possible answer
8. Success Criteria Proof
Finish with evidence that you can do each success criterion.