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The Atmosphere Properties

The atmosphere is an envelope of gases surrounding Earth, influencing both weather and climate. Its composition includes 78% nitrogen, essential for plant growth, and 21% oxygen, vital for energy production in living organisms. Other gases include carbon dioxide, utilized by plants for photosynthesis, and water vapor, which affects humidity levels. Solid particles like dust and pollen impact air quality. Air pressure, influenced by air density, varies with moisture and temperature, measured using a barometer, reflecting the dynamic nature of our atmosphere.

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The Atmosphere Properties

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  1. The Atmosphere Properties

  2. The air around us • Atmosphere – envelope of gases that surround the Earth. • Weather – refers to the current conditions of the atmosphere. • Climate – refers to the long term weather patterns.

  3. Composition of the Atmosphere • Nitrogen (N₂) – 78% • Necessary for living things to grow. • We cannot use it directly from the air. • We get it by eating plants that take it in from the air • Oxygen (O₂) 21% • Used by plants and animals to produce energy in our bodies. • Other gases in the atmosphere • Carbon dioxide (CO₂) is used by green plants to make their food • Water Vapor (H₂O) is water in a gas form. The amount in the atmosphere determines how “wet” the air is • Solid particles in the atmosphere include dust, pollen, and smoke. • They affect the air quality

  4. Air Pressure • Because air is made of atoms it causes the air to be able to push on the earth. • Depends on the density of the air. • More dense air = more pressure • Less dense air = less pressure • Dry air is more dense than moist air • Cold air is more dense than hot air • Measured using a barometer

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