Year 10 Science · Unit 1 · Lesson 18
Apply Worksheet
Learning Goals
Compare two
Complete the table to compare primary and secondary source investigations in genetics/evolution science.
| Feature | Primary source investigation | Secondary source investigation |
|---|---|---|
| Who collects the data? | ||
| Example in genetics/evolution | ||
| Main strength | ||
| Main limitation | ||
| Type of data accessed |
Real-world context
The Australian Report on Antimicrobial Use and Resistance in Human Health (AURA 2022), published by the Australian Commission on Safety and Quality in Health Care, reported that rates of methicillin-resistant Staphylococcus aureus (MRSA) bloodstream infections in Australia fell from 2.1 per 10,000 patient days in 2016 to 1.3 per 10,000 patient days in 2020, a reduction of approximately 38%. The report attributed this to improved hospital hygiene and antibiotic stewardship programs.
(a) Apply the CER framework to this data. Write a Claim about MRSA rates in Australia based on the AURA 2022 data.
(b) Write the specific Evidence from the AURA 2022 report that supports your claim. Include numbers.
(c) Write the Reasoningexplain the scientific mechanism that connects the evidence to your claim. Why did the MRSA rate decrease?
(d) Identify one limitation of using the AURA report as the sole source for an investigation on antibiotic resistance.
1. What does it mean to "evaluate a source for reliability" and why is this important in a secondary source investigation?
Wrap Up
In one sentence, what was the main idea of this lesson?