Year 9 Science · Unit 1 · Lesson 14

Synthesis and Depth Study Preparation

Challenge Worksheet

Name
Date
Class

Learning Goals

Go Deeper

Find the mistake

Each student answer below contains one or two subtle scientific errors. Identify the error(s) and rewrite the correct version.

Student Answer 1, Koch's Postulates

"To prove a bacterium causes a disease, you isolate it from a sick animal, grow it in a lab, and then inject it into a healthy animal. If the animal gets the same disease, you have proved it. You don't need to re-isolate the bacterium afterwards because you already proved it causes the disease."

1. Identify the error and write the correct version of the flawed sentence.

Challenge 2 marks

Student Answer 2, Vaccines and Immunity

"Vaccines work by injecting a small amount of live, dangerous pathogen into your bloodstream. Your body then fights the infection and remembers the pathogen. Herd immunity means the disease disappears once everyone is vaccinated."

2. This answer contains TWO errors. Identify both and rewrite the correct version of each flawed sentence.

Challenge 3 marks

Student Answer 3, Antibiotics and Resistance

"Antibiotics kill viruses and bacteria. When people take antibiotics too much, the person becomes resistant so the antibiotics stop working for them."

3. This answer contains TWO errors. Identify both and explain why each is incorrect.

Challenge 3 marks

Student Answer 4, Non-Infectious Disease

"Type 1 and type 2 diabetes are the same kind of disease, both caused by the pancreas not making enough insulin. Both can be prevented by a healthy diet and exercise."

4. Identify the errors and write a scientifically accurate comparison of type 1 and type 2 diabetes.

Challenge 3 marks

Show What You Know

1. Design a valid investigable question for a depth study about the relationship between processed food consumption and type 2 diabetes incidence in Australia. Then write a hypothesis using if–then–because format and identify your independent and dependent variables.

Challenge 4 marks

2. Explain how the three lines of defence form a layered system. What happens if only the first line is breached? What happens if all three fail?

Challenge 3 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 1 · Lesson 14 · Challenge Worksheet