Air is a mixture of gases consisting of approximately 4/5 Nitrogen and 1/5 Oxygen. Like all matter, air has weight and takes up space. It can also be compressed, unlike solids and liquids. These three properties will be studied in this investigation.

Introduction to Air Properties
Air is a mixture of gases that is essential for life on Earth. Understanding its properties helps in various fields such as meteorology, aviation, and environmental science.
Composition of Air
- Major Gases: Air is primarily composed of nitrogen (78%), oxygen (21%), and trace gases like argon, carbon dioxide, and neon.
- Variable Components: Water vapor content can vary significantly, affecting humidity and weather patterns.
Physical Properties
- Density: Air has a low density compared to solids and liquids. Density decreases with altitude.
- Temperature: Air temperature affects its density and pressure. Warm air rises while cool air sinks.
- Pressure: Air pressure is the force exerted by the weight of air above. It decreases with altitude.
Chemical Properties
- Reactivity: Air supports combustion due to its oxygen content. Certain gases can react chemically with air, leading to pollution.
- Pollutants: Air can contain harmful substances like carbon monoxide, sulfur dioxide, and particulate matter that affect air quality.
Behavioral Properties
- Compressibility: Air can be compressed, making it useful in various applications like pneumatic systems.
- Diffusion: Air can mix and spread out due to the movement of gas molecules, affecting odor and temperature distribution.
Conclusion
Understanding the properties of air is crucial for environmental awareness and scientific research, influencing daily life and technological advancements.