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Question 1 of 205eccef9ebacbc34ba4d46259

What would be considered the normal percentage of oxygen contained in the earths atmosphere at sea level?

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5eccef9ebacbc34ba4d46259

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What would be considered the normal percentage of oxygen contained in the earths atmosphere at sea level?

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🔍 Key Concepts

• Typical composition of dry air at sea level • Relationship between oxygen and nitrogen percentages in the atmosphere • How oxygen percentage is usually written in decimal vs percent form

💭 Think About

• First, think about the well-known percentage of oxygen people breathe at sea level in everyday life—what number do you usually hear? • Compare that typical oxygen percentage with the large percentage commonly associated with nitrogen in the atmosphere. • Convert a common oxygen percentage (like 21%) into a decimal or fraction form to see which option best matches.

✅ Before You Answer

• Remember that nitrogen is the largest component of air, and its percentage is much higher than oxygen. • Check whether the choices might be written in fraction of 1.0 (e.g., 0.xx) instead of percent out of 100. • Verify that the value you choose makes sense as a realistic breathable oxygen level at sea level (around one-fifth of the air).

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Question 1 of 205eccef9ebacbc34ba4d46259

What would be considered the normal percentage of oxygen contained in the earths atmosphere at sea level?

Back

Question 1 of 20

5eccef9ebacbc34ba4d46259

Q

What would be considered the normal percentage of oxygen contained in the earths atmosphere at sea level?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Typical composition of dry air at sea level • Relationship between oxygen and nitrogen percentages in the atmosphere • How oxygen percentage is usually written in decimal vs percent form

💭 Think About

• First, think about the well-known percentage of oxygen people breathe at sea level in everyday life—what number do you usually hear? • Compare that typical oxygen percentage with the large percentage commonly associated with nitrogen in the atmosphere. • Convert a common oxygen percentage (like 21%) into a decimal or fraction form to see which option best matches.

✅ Before You Answer

• Remember that nitrogen is the largest component of air, and its percentage is much higher than oxygen. • Check whether the choices might be written in fraction of 1.0 (e.g., 0.xx) instead of percent out of 100. • Verify that the value you choose makes sense as a realistic breathable oxygen level at sea level (around one-fifth of the air).

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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— No credit card needed