Greenhouse Effect Worksheet

Name:

Date:

Part A — Key Knowledge Review

1. Define the following terms. (1 mark each)

a) Greenhouse effect

b) Greenhouse gas

c) Carbon dioxide (CO₂)

d) Methane (CH₄)

e) Atmosphere

Part B — Multiple Choice (1 mark each)

2. Which greenhouse gas is produced when fossil fuels are burned?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Helium

3. What is the main purpose of the natural greenhouse effect?

A) To cool Earth

B) To stop sunlight reaching Earth

C) To keep Earth warm enough for life

D) To remove gases from the atmosphere

4. Which of the following is an example of a human activity increasing greenhouse gases?

A) Rainfall

B) Photosynthesis

C) Burning coal and oil

D) Ocean waves

5. Which greenhouse gas is commonly linked to livestock such as cows?

A) Methane

B) Oxygen

C) Nitrogen

D) Hydrogen

Part C — Fill in the Blanks

6. Use these words: heat, atmosphere, greenhouse gases, Sun, warmer

a) Energy from the ______ reaches Earth.

b) Earth absorbs and releases ______.

c) Some heat is trapped in the ______.

d) ______ help stop all heat escaping.

e) This makes Earth much ______.

Part D — Short Answer & Data Interpretation

7. Explain how the greenhouse effect works in 3–4 sentences. (4 marks)

8. Name three greenhouse gases and give one source for each. (6 marks)

CO₂ — Source:

CH₄ — Source:

Water vapour — Source:

9. Explain the difference between the natural greenhouse effect and the enhanced greenhouse effect. (4 marks)

10. Why would life on Earth be difficult without the greenhouse effect? (3 marks)

11. Data Interpretation — Scientists measured CO₂ levels (ppm): 1980: 338, 1990: 354, 2000: 370, 2010: 390, 2020: 414.

a) What trend do you notice? (2 marks)

b) What might increasing CO₂ levels do to Earth’s temperature and why? (3 marks)

12. Extended Response — Homework Paragraph (8 marks)

Write ONE detailed paragraph explaining how the greenhouse effect works. Include the Sun, heat entering and leaving Earth, greenhouse gases (mention CO₂ or CH₄), trapped heat, why the natural greenhouse effect is important and a brief mention of the enhanced greenhouse effect.

Challenge Question (Optional) 13. Can humans reduce the enhanced greenhouse effect? Give examples. (5 marks)