Air pressure - The force exerted by the atmosphere on Earth’s surface by the weight of the air above the surface, Atmospheric movement - Global air circulation patterns within the atmosphere held to Earth by gravity and warmed as heat radiates from Earth; influenced by the convection of warm, less dense air (rises and spreads out) and cold, dense air (sinks), Climate - The average weather patterns for a particular region, Weather - The day-to-day state of the atmosphere, Wind - A natural movement of air, sometimes with considerable force, from an area of high density and pressure to an area of low density and pressure, Atmosphere - The layer of gas surrounding a planet that is held in place by gravity, Hydrosphere - All the water on Earth’s surface; includes all water sources above and below the surface,

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