Year 10 Science · Unit 2 · Lesson 14
Challenge Worksheet
Learning Goals
Design a secondary source investigation
You will plan and describe a secondary source investigation into how temperature affects the rate of a biological enzyme reaction. Choose ONE enzyme from the list below. Then complete all parts of the investigation plan.
Choose your enzyme
Option A: Amylase (breaks down starch in the human digestive system) | Option B: Lipase (breaks down fats in the small intestine) | Option C: Catalase (breaks down hydrogen peroxide in liver cells)
| My chosen enzyme and why I chose it | |
| Research question | |
| Data source I will use (type of source and why it's reliable) | |
| What data I will collect (variable, units, number of temperatures) | |
| How I will analyse the data (graph type, what I will compare) | |
| Expected finding (based on lesson knowledge) | |
| Possible counter-evidence I should look for (e.g. exceptions, limitations) |
1. A published study on the enzyme catalase found that at 37°C the rate of H₂O₂ decomposition was 180 units/min, but at 60°C it dropped to 12 units/min. Write a CER conclusion for this data. Include: a claim about the effect of temperature, specific numerical evidence from the data, reasoning that uses enzyme denaturation, AND one sentence that acknowledges a possible limitation or counter-consideration.
2. Compare the reliability of a secondary source investigation (using published data) with a primary source investigation (your own lab experiment) for studying enzyme activity. Identify ONE advantage and ONE disadvantage of each approach.
Wrap Up
In one sentence, what was the main idea of this lesson?