Photosynthesis Investigation Worksheet

Name:

Date:

Photosynthesis diagram showing sunlight, leaves and oxygen

🎯 WALT: Understand photosynthesis and design experiments

Success Criteria: I can explain photosynthesis, interpret data, and design fair tests

1. Complete the word equation for photosynthesis:

_________ + water → glucose + _________

Dyslexia support: carbon dioxide, oxygen

2. Which part of the plant cell is responsible for photosynthesis?

Nucleus

Chloroplast

Mitochondria

Cell wall

3. A student tested photosynthesis rates at different light intensities. Here are the results:

Light Distance (cm): 10, 20, 30, 40

Bubbles per minute: 45, 28, 15, 8

What pattern do you observe? _________________________________

Calculate the average rate between 10cm and 20cm: _______ bubbles/min

4. Design a fair test to investigate how temperature affects photosynthesis rate.

Hint: Think about variables to change, measure, and control

🔬 Practical Investigation & Analysis

5. You're testing a leaf for starch using iodine solution. Tick all correct statements:

Blue-black colour indicates starch is present

The leaf should be boiled in water first

Ethanol removes chlorophyll

Yellow colour shows photosynthesis occurred

6. Explain why chloroplasts contain chlorophyll and describe their structure:

Support: Think about light absorption, thylakoids, and stroma

7. A greenhouse owner wants to maximise photosynthesis. Suggest three environmental factors they could control and explain why:

🌟 Stretch & Challenge

8. Extension Task: Climate change is increasing atmospheric CO₂ levels. Predict and explain how this might affect global photosynthesis rates:

9. Challenge: Design an experiment to prove that oxygen is produced during photosynthesis. Include a control group:

10. Real-world Application: How could understanding photosynthesis help solve food security issues in New Zealand?

Differentiation Support:

• Visual learners: Draw diagrams for questions 6 & 9

• Reading support: Key terms highlighted, sentence starters provided

• Extension: Research limiting factors in photosynthesis for bonus marks

Photosynthesis Investigation Worksheet

Photosynthesis Investigation Worksheet

🎯 WALT: Understand photosynthesis and design experiments

🔬 Practical Investigation & Analysis

🌟 Stretch & Challenge

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