1. Influences on Weather

2. EQ: What has an effect on the weather?

3. Weather is the state of the atmosphere at a particular place and time. The amount of water in the air, the temperature of the air and the precipitation are all used to describe the atmosphere.

4. Humidity is the amount of water in the air.  Summer Days  Hygrometer So how does water in the air affect the weather?  Clouds  Precipitation Water in the Air

5. So how does temperature affect the weather?  Warmer air = more water vapor  Precipitation Temperature is how hot or cold the air is.  Thermometer Temperature

6. Clouds Cloud formation is affected by temperature and humidity.  Types  Weather predictors

7. Air Pressure Air Pressure is the weight of the air.  The sun’s role  Warmer, lighter, less dense air = lower air pressure  Barometer  Low pressure = warm temps, rain and storms  High pressure = cool temps & clear skies

8. Wind Wind is the natural movement of air.  What causes it?  Air moves from ___ pressure to ___ pressure areas.  High pressure area close to a low pressure area means the wind will be fast.  Big temperature differences in the areas will make wind blow faster.

9. Review Air Pressure, Moisture and Weather.asf

10. Read About it  Read with a partner about the influences on weather on pages 97-99 in the EOG Science Book  On your own, answer questions 1-4 on pages 99-100.