🌍 Part 1: Atmospheric Gas Knowledge

1. What percentage of Earth's atmosphere is made up of nitrogen?

21%

78%

0.04%

50%

2. Which gas is essential for human breathing and makes up about 21% of the atmosphere?

Carbon dioxide

Nitrogen

Oxygen

Water vapour

3. Carbon dioxide makes up approximately _______ of Earth's atmosphere.

0.04%

4%

21%

78%

4. Which of the following are considered trace gases in our atmosphere? (Select all that apply)

Argon

Water vapour

Methane

Nitrogen

🔬 Part 2: Gas Functions and Significance

5. Explain why oxygen is essential for life on Earth.

6. Complete the sentence: Carbon dioxide is important for plants because _________________.

7. Even though nitrogen makes up most of our atmosphere, most living things cannot use it directly. How do plants typically obtain the nitrogen they need?

8. Describe one way that human activities might change the composition of atmospheric gases.

🌱 Part 3: Critical Thinking

9. Imagine the percentage of carbon dioxide in our atmosphere doubled. Predict two possible effects this might have on Earth's environment.

10. In Māori culture, rangi refers to the sky and hau to the wind/air. How does understanding atmospheric gas composition help us better appreciate the importance of rangi and hau in sustaining life?