Weather is affected by temperature, humidity, air pressure, and wind. These factors are interrelated. A change in one can impact the others. Temperature and air pressure have an inverse relationship - higher temperatures mean lower air pressures as the air expands. Higher temperatures also mean higher humidity as warm air holds more water vapor. Relative humidity decreases with increasing temperature. Wind blows from high to low pressure as air moves to equalize differences. Global wind patterns are caused by uneven heating and pressure differences.

1. Weather Part 1 Temperature

6. Weather Part 2 Air Pressure

12. Weather Part 3 Wind

18. Weather Part 4 Humidity

44. Weather How do these variables relate to each other?

47. The relationship between air temperature and air pressure

56. The relationship between air pressure and humidity

59. Air temperature and humidity

63. Air Pressure and Wind