Podcast
Questions and Answers
What is the approximate percentage of oxygen in the Earth's atmosphere?
What is the approximate percentage of oxygen in the Earth's atmosphere?
- 0.9%
- 78%
- 21% (correct)
- 0.03%
Which gas is present in the Earth's atmosphere in the highest percentage?
Which gas is present in the Earth's atmosphere in the highest percentage?
- CO2
- Ozone
- Ar
- Nitrogen (correct)
What role does the Earth's atmosphere play in protecting life on Earth?
What role does the Earth's atmosphere play in protecting life on Earth?
- Absorbing most of the cosmic rays (correct)
- Providing oxygen for respiration
- Sustaining plant photosynthesis
- Maintaining the heat balance
Why is the Earth's atmosphere referred to as a dumping ground for many pollutant materials?
Why is the Earth's atmosphere referred to as a dumping ground for many pollutant materials?
How does the Earth's atmosphere contribute to plant photosynthesis?
How does the Earth's atmosphere contribute to plant photosynthesis?
What is the relationship between biosphere and ecosystem based on the text?
What is the relationship between biosphere and ecosystem based on the text?
Which of the following is NOT a part of the biosphere as described in the text?
Which of the following is NOT a part of the biosphere as described in the text?
Why are lower atmosphere, oceans, and soils considered part of the biosphere?
Why are lower atmosphere, oceans, and soils considered part of the biosphere?
Which of the following is characteristic of ecosystems according to the text?
Which of the following is characteristic of ecosystems according to the text?
In the context of the text, what makes an ecosystem distinct from the biosphere?
In the context of the text, what makes an ecosystem distinct from the biosphere?
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