🌿 Part 1: Multiple Choice Questions

Choose the best answer for each question.

1. Which term describes the role of an organism in its ecosystem?

Habitat

Niche

Population

Community

2. In a food chain, which organism would be classified as a primary consumer?

Grass

Rabbit

Fox

Hawk

3. Which of the following best explains why biodiversity is important for ecosystem stability?

More species means more competition

Greater variety provides resilience against environmental changes

Larger populations are always better

Biodiversity has no effect on stability

4. Which human activities can negatively impact ecosystems? (Select all that apply)

Deforestation

Pollution

Conservation efforts

Overfishing

Creating nature reserves

📝 Part 2: Short Answer Questions

5. Explain the difference between a food chain and a food web. Give one advantage that food webs have over food chains in representing ecosystem relationships.

6. Describe two ways that the introduction of an invasive species could affect a native ecosystem.

7. Complete the following energy flow sequence by filling in the blanks:

Sun → _____________ → Primary Consumer → _____________ → Tertiary Consumer → _____________

📊 Part 3: Data Analysis

8. A scientist studied bird populations in a New Zealand forest before and after a pest control programme. The data is shown below:

Bird Population Data:

Tui: Before = 45, After = 78

Fantail: Before = 32, After = 51

Bellbird: Before = 18, After = 29

Kereru: Before = 12, After = 23

a) Calculate the percentage increase in the Tui population. Show your working.

b) Suggest two reasons why the bird populations increased after the pest control programme.

c) Explain how this increase in native bird populations might affect other parts of the forest ecosystem.

Ecology Summative Assessment Worksheet

Ecology Summative Assessment Worksheet

🌿 Part 1: Multiple Choice Questions

📝 Part 2: Short Answer Questions

📊 Part 3: Data Analysis

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