What will the weather be like tomorrow? 2.

This instructional design attempts to enable students to summarize the related terms and meanings of weather maps by reading maps, collecting information and watching falsh animation, so as to cultivate students' abilities of reading maps, collecting information, analyzing information and synthesizing information, promote students' autonomous learning, and consolidate and develop existing knowledge.

Textbook analysis

On the basis of students' understanding of the characteristics of meteorological elements, this textbook introduces the general methods of collecting meteorological information, judging weather conditions and forecasting weather. This lesson mainly allows students to judge the weather and master some simple methods to forecast the weather. In teaching, students can start with their familiar life knowledge and contact local weather proverbs to enhance their sense of identity.

Teaching objectives

1. Knowledge and skills

Understand the common methods of weather forecast; Learn to watch the weather forecast; Learn to read simple weather maps and master important weather systems on weather maps; Use the weather map to judge the weather and make a simple weather forecast; Understand the main collection methods of weather forecast information; Investigate local proverbs and tell the truth.

Scientific thinking

Cultivate students' ability to read pictures, collect information, analyze information and synthesize information.

solve problems

Let students learn to judge the weather conditions and master some simple methods to forecast the weather.

4. Emotional attitude

By consulting the weather forecast, students' cooperative ability and scientific attitude towards life can be cultivated.

Teaching emphases and difficulties

Teaching emphasis: learn to watch the weather forecast; Knowing the meaning of weather terms, I can read simple weather maps; Judge the weather according to the weather system on the weather map.

Teaching difficulty: mastering the important weather system on the weather map.

Teaching preparation

Before arranging the course, students collect a weather forecast and related pictures of the day.

multimedia courseware

teaching process

Introduction of new lessons

Q: Do you know the story of Zhuge Liang's "borrowing an arrow from a grass boat in the fog" and "East wind burning Cao Ying" during the Three Kingdoms period?

Health: tell the story briefly.

Teacher: These two stories illustrate how important it is to know the weather during the war. In fact, human production and life are closely related to human production.

Teacher: Do you know the weather today?

Health: ...

The second lesson demonstration

How to read the weather forecast

1. Method of obtaining weather forecast

Teacher: Then how did you get these weather conditions?

Health: TV, telephone, Internet, SMS.

Teacher: Besides the above methods, we can also forecast the weather by analyzing the weather map or observing the weather.

2. Weather symbols

Show the weather symbols commonly used in the courseware and ask the students to say what they stand for.

3. The meaning of weather terms

Teacher: Show a weather forecast about a day in Shanghai, and ask students to explain the meaning of related terms by consulting the knowledge in the book.

Health 1: cloudy: the total amount of clouds in the sky accounts for more than 8/ 10; Cloudy: The total amount of clouds in the sky is between 5/ 10 and 7/ 10.

Partly cloudy: the total amount of clouds in the sky is between 5/ 10 and 3/ 10. Sunny day: the total cloud cover in the sky is below 3/ 10.

Student 2: Heavy rain: 12 hours precipitation is greater than moderate rain:15 mm-15 mm.

Light rain: less than 5 mm

Health 3: Precipitation probability: indicates the probability of precipitation.

The Significance of "Practice" in Today's Weather

(2) Weather map and weather system

1. Weather chart

Teacher: A weather map represents a weather situation, and it is a map that can display meteorological information in different places. It has been 100 years since weather charts were used to forecast the weather. The first weather map in the world was drawn by French astronomers in 1853 10/2. When analyzing the weather map, we should first understand the weather terms.

"Courseware Display" Weather Map

(1) contour line

Ask the students to review the contour knowledge in grade one, and then say the definition of isobar according to the definition of contour and weather map.

(2) High pressure system and low pressure system

According to the characteristics of isobars, we can analyze some systems that affect the weather, such as high pressure and low pressure.

Teacher: What are the characteristics of the isobar distribution of the system?

Health: The closer to the center, the higher the air pressure.

Teacher: What's the weather like under the high pressure system?

Health: sunny and dry.

Teacher: So what are the characteristics of isobar distribution in low-voltage system? How's the weather?

Health: the closer to the center, the lower the pressure closure curve; Weather conditions: rainy weather

(3) cold and warm fronts

"Courseware display" cold and warm fronts's flash animation, so that students can watch the animation carefully and gain relevant knowledge.

Teacher: When the cold air mass and the warm air mass meet, who is above and who is below? Why?

Health: The density of cold air mass is high, but that of warm air mass is low, even if the cold air mass is below the warm air mass.

Teacher: The cold air mass is under the warm air mass.

"Courseware display" cold front system About flash, students listen and observe carefully and answer the following questions.

1. What is a cold front?

2. What weather will the cold front bring? What weather will it bring after crossing the border?

Raw 1 cold front: the front where the cold air mass moves to the side of the warm air mass.

Health 2: When crossing the border: cooling, precipitation, windy weather.

After crossing the border: the temperature drops, the air pressure rises and the weather turns fine.

"Courseware Display" Warm Front System About flash, students listen and observe carefully and answer the following questions.

1. What is a warm front?

2. What weather will the warm front bring? What weather will it bring after crossing the border?

Health 1: warm front: a front moving to one side of the cold air mass.

Health 2: when crossing the border: the temperature rises and the precipitation falls.

After crossing the border: the temperature rises, the air pressure decreases and the weather turns fine.

(4) Typhoon

Precipitation, cooling, windy weather

Show the map of the weather situation on page 74 of this book, and let the students analyze the weather situation in China.

1. Find out the weather conditions that have great influence on China that day.

2. Analyze the weather in China.

3. Forecast the weather in Beijing, Shanghai and Guangzhou in the next 24 hours.

(3) tools for collecting weather phenomena

Ask the students to read the relevant knowledge on page 75 of the textbook, and then answer the phenomenon tools of modern weather collection.

Third, class summary.

1. How to read the weather forecast

2. Weather chart

Weather system: high pressure system, low pressure system, typhoon in cold and warm fronts.

3. Tools for collecting weather phenomena