Multiple Choice
During an ice age, how would the ratio of pressure to temperature (P/T) of an ideal gas change, assuming volume and the amount of gas remain constant?
7. Gases
The Ideal Gas Law
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Which event led to the significant increase of oxygen in Earth's atmosphere?
A
The formation of the ozone layer
B
The Cambrian Explosion
C
The extinction of the dinosaurs
D
The Great Oxidation Event
Verified step by step guidance1
Understand the context: The problem is asking about a historical event that led to a significant increase in oxygen levels in Earth's atmosphere.
Identify the key term: The Great Oxidation Event is the correct answer, which refers to a period in Earth's history when there was a dramatic rise in atmospheric oxygen.
Explain the concept: The Great Oxidation Event occurred approximately 2.4 billion years ago and is attributed to the activity of cyanobacteria, which began producing oxygen through photosynthesis.
Discuss the impact: This event led to the accumulation of oxygen in the atmosphere, which eventually allowed for the development of more complex life forms.
Clarify misconceptions: The other options, such as the formation of the ozone layer, the Cambrian Explosion, and the extinction of the dinosaurs, are significant events but did not directly lead to the initial increase in atmospheric oxygen.
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