Atmosphere

The atmosphere is a layer of gases that surrounds the Earth and is held in place by the force of gravity. It is composed of different gases, including nitrogen, oxygen, carbon dioxide, and trace amounts of other gases.

Composition of the Atmosphere:

• Nitrogen: 78%
• Oxygen: 21%
• Carbon Dioxide: 0.04%
• Trace Gases: 0.96%

Layers of the Atmosphere:

The atmosphere is divided into five main layers based on temperature changes: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

Functions of the Atmosphere:

1. Protection: The atmosphere protects the Earth from harmful solar radiation and meteoroids.
2. Temperature Regulation: It helps regulate the Earth's temperature by trapping heat from the sun.
3. Weather: The atmosphere is responsible for weather patterns and phenomena such as rain, snow, and storms.
4. Breathable Air: It provides the essential gases for breathing and sustains life on Earth.

Atmospheric Pressure:

The weight of the air above us creates atmospheric pressure. As altitude increases, atmospheric pressure decreases.

Study Guide:

1. What are the main components of the atmosphere?
2. Describe the layers of the atmosphere and their characteristics.
3. Explain the functions of the atmosphere.
4. How does atmospheric pressure change with altitude?

Understanding the atmosphere is crucial for understanding weather patterns, climate, and the environment. It is also essential for understanding the impact of human activities on the atmosphere, such as air pollution and climate change.

[Atmosphere] Related Worksheets and Study Guides:

• Earth's freshwater and atmosphereScience • Fifth Grade
• Earth's AtmosphereScience • Sixth Grade