Influences on Weather

1
Influences on Weather
2
EQ What has an effect on the weather?
3

• Weather 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.

Climate The average weather conditions of a
particular area.
4
5 Things that Influence Weather

1. Humidity
2. Temperature
3. Clouds
4. Air Pressure
5. Wind

5
Water in the Air

• Humidity is the amount of water in the air.
• Summer Days
• Hygrometer

• So how does water in the air affect the weather?
• Clouds
• Precipitation

6
Temperature

• Temperature is how hot or cold the air is.
• Thermometer measures temperature

• So how does temperature affect the weather?
• Warmer air more water vapor
• Precipitation

7
Clouds

• Cloud formation is affected by temperature and
  humidity.
• Types
• Weather predictors

8
Air Pressure

• Air Pressure is the weight of the air.
• The sun plays a role
• Warmer, lighter, less dense air rises lower
  air pressure
• Barometer measure air pressure
• Low pressure warm temps, rain and storms
• High pressure cooler temps clear skies

9
Wind

• Wind is the natural movement of air.
• What causes it?
• Air moves from high pressure to low pressure
  areas.
• High pressure area close to a low pressure area
  fast wind.
• Big temp differences in the areas will make wind
  blow fast.

10
Wind Continued

• An anemometer measures wind speed.
• A weather vane or wind vane tells the direction
  wind is blowing.

11
Review
Air Pressure, Moisture and Weather.asf
12
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.