Podcast
Questions and Answers
What is the primary function of the atmosphere?
What is the primary function of the atmosphere?
- To act as a shield from harmful solar radiation (correct)
- To maintain the Earth's temperature
- To provide oxygen for breathing
- To help sustain aquatic life
What is the approximate percentage composition of nitrogen in the atmosphere?
What is the approximate percentage composition of nitrogen in the atmosphere?
- 1%
- 78% (correct)
- 33%
- 21%
Which statement correctly describes the gravitational force in relation to the atmosphere?
Which statement correctly describes the gravitational force in relation to the atmosphere?
- It pushes the atmosphere away from the Earth.
- It is the reason air pressure increases with altitude.
- It pulls the atmosphere towards the center of the Earth. (correct)
- It has no effect on the atmosphere.
Which gas constitutes the smallest percentage of the Earth's atmosphere?
Which gas constitutes the smallest percentage of the Earth's atmosphere?
What protects life on Earth from the sun's harmful rays?
What protects life on Earth from the sun's harmful rays?
What would likely occur without the atmosphere?
What would likely occur without the atmosphere?
Flashcards
Atmosphere's primary function?
Atmosphere's primary function?
Shields Earth from harmful solar radiation.
Nitrogen percentage in atmosphere?
Nitrogen percentage in atmosphere?
Approximately 78%.
Gravitational force's effect?
Gravitational force's effect?
Pulls the atmosphere towards Earth's center.
Gas with smallest percentage?
Gas with smallest percentage?
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Our protection from sun's rays?
Our protection from sun's rays?
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What if no atmosphere?
What if no atmosphere?
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Study Notes
Meaning of Atmosphere
- Atmosphere refers to the layer of air (gases) surrounding the Earth.
- Although invisible, its presence is evidenced by phenomena like the inflation of a balloon filled with air.
- Extends up to 1600 km above the Earth's surface.
- Provides essential protection against harmful solar rays.
Composition of Atmosphere
- The atmosphere is held close to the Earth by gravitational force, which pulls it towards the planet's center.
- Main components of the atmosphere include:
- Oxygen: 21%
- Nitrogen: 78%
- Other gases (including argon, carbon dioxide, hydrogen, etc.): 1%
Importance of Earth's Domains
- Earth comprises three critical domains: land, water, and environment.
- These domains interact in various ways, playing a crucial role in maintaining life on the planet.
- Understanding these interactions is fundamental for appreciating the complexity of Earth's ecosystems.
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