Sun - Provides energy for convection, Wind - Air in motion, Uneven heating of the Earth - Produces wind, Direct sunlight - areas of the Earth tend to stay warm all year due to this, Indirect sunlight - areas of the Earth tend to be colder over the year due to this, Warm Air (motion) - Rises, Cold Air (motion) - Sinks, convection - Transfer of heat from warm air rising and cold air sinking, Density of warm air - less dense, Density of cold air - more dense,

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