CHAPTER NEW CHAPTER Weather Patterns the BIG idea
CHAPTER NEW CHAPTER Weather Patterns the BIG idea Some features of weather have predictable patterns. 2. 1 The atmosphere's air pressure changes. 2. 2 The atmosphere has wind patterns. 2. 3 Most clouds form as air rises and cools. 2. 4 Water falls to Earth’s surface as precipitation. CHAPTER OUTLINE CHAPTER RESOURCES
2. 1 KEY CONCEPT CHAPTER HOME The atmosphere's air pressure changes. Air pressure is the force of air molecules pushing on an area. Air pressure decreases as you move higher in the atmosphere. Air pressure can also differ in two locations at the same altitude. VOCABULARY air pressure barometer CHAPTER RESOURCES SECTION OUTLINE
2. 2 CHAPTER HOME KEY CONCEPT The atmosphere has wind patterns. Wind blows from areas of high pressure toward areas of low pressure. Earth's rotation causes long distance winds to curve. VOCABULARY weather wind global wind Coriolis effect area of high pressure area of low pressure VISUALIZATION CLASSZONE. COM Explore how breezes blowing over land water change over the course of a day. View an animation of the Coriolis effect. jet stream monsoon CHAPTER RESOURCES SECTION OUTLINE
2. 3 KEY CONCEPT CHAPTER HOME Most clouds form as air rises and cools. Clouds are made of tiny water droplets that condense from water vapor in rising air. level where condensation begins VOCABULARY evaporation condensation precipitation humidity saturation relative humidity dew point CHAPTER RESOURCES SECTION OUTLINE
2. 4 CHAPTER HOME KEY CONCEPT Water falls to Earth’s surface as precipitation. VOCABULARY Water droplets in clouds merge to form raindrops. freezing rain sleet hail Ice crystals in clouds can form snow, rain, and other types of precipitation. Freezing rain is rain that freezes when it hits the ground or other surfaces. Sleet is rain that freezes into ice pellets while falling through cold air. Snow forms from ice crystals that merge in clouds. acid rain Hail forms when ice pellets move up and down in clouds, growing larger as they gain layers of ice. CHAPTER RESOURCES SECTION OUTLINE
2. 1 KEY CONCEPT CHAPTER HOME The atmosphere's air pressure changes. I. The atmosphere's air pressure changes. A. Air exerts pressure. VOCABULARY air pressure barometer B. Air pressure is related to altitude and density. 1. Pressure and Air Motion 2. Barometers and Air Pressure CHAPTER RESOURCES KEY CONCEPT SUMMARY
2. 2 KEY CONCEPT CHAPTER HOME The atmosphere has wind patterns. II. The atmosphere has wind patterns. A. Uneven heating causes air to move. B. Earth’s rotation affects wind direction. C. Bands of calm air separate global wind belts. 1. Calm Regions 2. Wind Belts VOCABULARY weather wind global wind Coriolis effect jet stream monsoon 3. Effects of Wind on Travel D. Jet streams flow near the top of the troposphere. E. Patterns of heating and cooling cause local winds and monsoons. 1. Local Winds 2. Monsoons CHAPTER RESOURCES KEY CONCEPT SUMMARY
2. 3 KEY CONCEPT CHAPTER HOME Most clouds form as air rises and cools. III. Most clouds form as air rises and cools. A. Temperature affects water in the air. 1. Water in the Air 2. Humidity and Relative Humidity B. Water vapor condenses and forms clouds. VOCABULARY evaporation condensation precipitation humidity saturation 1. Characteristics of Clouds relative humidity 2. Cirrus Clouds dew point 3. Cumulus Clouds 4. Stratus Clouds 5. Fog CHAPTER RESOURCES KEY CONCEPT SUMMARY
2. 4 KEY CONCEPT CHAPTER HOME Water falls to Earth’s surface as precipitation. IV. Water falls to Earth’s surface as precipitation. A. Precipitation forms from water droplets or ice crystals. 1. Measuring Precipitation VOCABULARY freezing rain sleet hail acid rain 2. Types of Precipitation B. Precipitation carry pollution. CHAPTER RESOURCES KEY CONCEPT SUMMARY
CHAPTER HOME Chapter Resources Image Gallery Review Game Click here to review chapter images and animations Animations Play a fun interactive review game Link to all the Mc. Dougal Littell Science animations Click on the items below to access resources on CLASSZONE. COM Audio Readings Resource Centers Hear chapter audio readings Get more information on select science topics Content Review Standardized Test Practice Review key concepts and vocabulary Math Tutorial Review math concepts BACK TO CHAPTER Practice state standardized tests
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