Past Paper questions for Unit 3: Life on Earth (by Key Area):

3.1 Ecosystems – Questions

• 3.1 Ecosystems – Marking Instructions

3.2 Distribution of Organisms – Questions

• 3.2 Distribution of Organisms – Marking Instructions

3.3 Photosynthesis – Questions

• 3.3 Photosynthesis – Marking Instructions

3.4 Energy in Ecosystems – Questions

• 3.4 Energy in Ecosystems – Marking Instructions

3.5 Food Production – Questions

• 3.5 Food Production – Marking Instructions

3.6 Evolution of Species – Questions

• 3.6 Evolution of Species – Marking Instructions