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Preview questions
1. What is the primary component of air?
Oxygen · Nitrogen · Carbon Dioxide · Hydrogen
2. Which layer of the atmosphere contains the ozone layer?
Troposphere · Stratosphere · Mesosphere · Thermosphere
3. What is the process by which plants release oxygen?
Respiration · Photosynthesis · Transpiration · Evaporation
4. Which gas is essential for human respiration?
Nitrogen · Oxygen · Carbon Dioxide · Argon
5. What is the term for the movement of air from high pressure to low pressure?
Evaporation · Condensation · Wind · Humidity
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