Air and Weather Introduction • What is air made of? • What is the atmosphere? • How do humans depend on air? Sandstorm Windy Day Aftermath of a Tornado Tropical Storm Windy Situation • What cause wind? • What are some negative effects of the wind? • What are some positive effects of the wind? Definitions • • • • • • • • Atmosphere Temperature Humidity Air Pressure Thermometer Wind Vane Barometer Rain Gauge