Pd: Date: Page # Weather Patterns -- Lesson 2 Study Guide

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1 Name: Pd: Date: Page # Weather Patterns -- Lesson 2 Study Guide Rating Before Learning Goals Rating After What are two types of pressure systems? What drives weather patterns? Why is it useful to understand weather patterns? Self Assessment Rating Definition I fully understand the learning goal. I can explain it to a classmate or teacher orally or written without the use of notes. I can give specific real world examples. I understand the learning goal and can explain the main points. I am still unsure about the fine points, details and/or real world examples. I understand parts of the learning goal. I will need to review the main ideas, details, and examples so that I can become more confident in achieving this goal. I can identify what I have completed and learned, and where I need assistance. I do not understand this learning goal. I do not feel that I would be successful in answering questions about this learning goal. Confidence Level High Medium Low None ***In order to be successful on the quiz for this lesson, one should complete the following tasks associated with Chapter 13 Lesson 2. Level Tasks 1 Read Describing Weather page 209 to 214 Respond to the key concept questions and the questions that are associated with them (see below) 2 Create a set of flashcards for the vocabulary on page Review the assignments and activities that were associated with this lesson Complete the Key Concept Builder Air Masses & Fronts Key Concept Outline A. Pressure Systems 1. A(n) low-pressure system is a large body of circulating air that has low pressure at its center and high pressure on the outside. a. Air moves from high pressure to low pressure. b. In a low-pressure system, air moves away from the outside of the system. c. Air in the center of the system rises, and the water vapor in it condenses and forms clouds. 2. A(n) _high-pressure system is a large body of circulating air that has high pressure at its center and lower pressure on the outside. a. High-pressure air at the center sinks and moves toward lowpressure areas. b. High-pressure systems bring clear skies.

2 B. Air Masses 1. Air masses are large bodies of air that have distinct temperature and moisture characteristics. 2. An air mass forms when a(n) high-pressure system lingers in one area for a few days. a. Continental polar air masses are cold and dry. b. Arctic air masses are very cold and dry. They form over continents or arctic ice. C. Fronts 1. A weather front is the boundary between two air masses. 2. A(n) cold front forms when a colder air mass moves toward a warmer air mass. It often brings severe storms and colder temperatures. 3. A(n) warm front forms when a warmer air mass moves toward a cooler air mass. a. As the warm air rises, water vapor condense, and precipitation often occurs b. A warm front brings warmer temperatures and shifting winds. 4. A(n) stationary front forms when the boundary between two air mass stalls. It brings cloudy skies and light rain. toward rise outward fall

3 Key Concept Builder Air Masses Key Concept What drives weather patterns? Directions: Work with a partner to answer each question on the lines provided. Air Masses Arctic Polar Tropical 1. Over what area does this air mass Siberia and the arctic 2. What type of air does it bitterly cold and dry 3. How low does the air temperature reach? -40 C Continental: 4. Where do these air masses in the interior of Canada and Alaska 5. What type of air do they cold, dry air 6. What kind of temperatures does this type of air mass bring? cold temperatures in winter and cool weather in summer Continental: 10. Where do these air masses over dry, desert land 11. What type of air do they hot and dry 12. When do they usually during the summer 13. What type of weather do they bring? clear skies and high temperatures Maritime: 7. Where do these air masses over the northern Atlantic and Pacific oceans 8. What type of air do they cold and humid 9. What type of weather do they bring? cloudy and rainy Maritime: 14. Where do these air masses near the equator 15. What type of air do they contain in the summer? hot and humid 16. What type of winter weather do they bring? heavy snowfall

4 Key Concept Builder Fronts Key Concept Why is it useful to understand weather patterns? Directions: Put a check mark in the space to identify the correct front(s). Front Weather Event Cold Warm Stationary Occluded 1. A colder air mass moves toward a warmer air mass. 2. An approaching front stalls. 3. Warm air glides above a cold air mass. 4. A fast-moving cold front catches up with a slow-moving warm front. 5. The boundary between two air masses stalls. 6. The wind becomes gusty and changes directions. 7. A wide blanket of clouds is created. 8. A few days of warm weather occur. 9. Warm air is forced to rise. 10. This is present at the edge of an approaching air mass. 11. This front moves faster than a warm front. 12. This usually brings precipitation.

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