How to explain the fog correctly with the big class children?

Science teaching plan for large classes: the wind is coming

Activity design background

Wind is a common natural phenomenon, and it is also a natural phenomenon of great interest to children. From the formation, types and functions of wind, it contains very rich scientific knowledge. Let children understand this knowledge in a simple way, which can broaden their horizons, enrich their knowledge and improve their scientific literacy. Through hands-on "creating wind", children's hands-on ability, thinking ability and coordination ability can also be cultivated, thus developing their potential.

moving target

1, initially understand the advantages and disadvantages of wind, guide children to look at things dialectically and form a scientific way of thinking from an early age.

2. Know what to do to reduce the wind disaster and how to treat the wind.

3. Be able to coordinate with peers in activities and learn from each other in cooperation.

Teaching emphases and difficulties

Is there any way to reduce the wind disaster and use the wind?

Activities to be prepared

1. Please ask parents and children to observe some wind-related phenomena: decorative flower and bird pendants hanging indoors are fluttering; The shaking of trees; Waves in the water, etc.

2. Preparation of articles: syringes, balloons, fans, feathers, blowpipes, strings, sprayers, hair dryers, mosquito-repellent incense, fans, scraps of paper, cardboard, beverage bottles, etc.

3. Knowledge preparation: proverbs of the wind; Looking for different winds, etc.

Activity process

Do experiments first to understand the cause of wind.

1. The teacher blew up a balloon with a syringe and tied it with a string. Interact with children in the process of blowing balloons.

Teacher: What happened to the balloon?

Yang: It's getting bigger.

Teacher: Why is it getting bigger?

Teenager: Because "Qi" enters the balloon.

Teacher: Where does the gas come from?

Get out of the syringe.

Teacher: Where does the "gas" in the syringe come from?

Yang: From the air.

Summary: We are surrounded by air (laying the foundation for understanding the causes of wind below).

2. The teacher turns on the electric fan to let the children feel the "wind".

Teacher: Now turn off the fan. Can children still feel the wind?

Teenager: There is no wind.

Summary: When the electric fan is turned on, we feel the wind because of the air flow. When the electric fan is turned off, there is no air flow, so there is no wind. Therefore, wind is caused by airflow.

Second, children's experiments have deepened their understanding of the causes of wind.

1, each group of children chooses their favorite items from their workstations and tries to make the air move to generate wind. Let the children talk about how they play (choose a representative from each group).

2. The teacher will blow the balloon for the children, let them work in pairs, let the air in the balloon out, and feel the force of the air being squeezed out, whether it forms the wind.

3. Badminton competition. (1) Feathers are placed on the table. Question: What should I do if I let the feather move (without touching it)? (Fan, blow) (2) Children are divided into two groups. The teacher put down two feathers at the same time from a height to see which group of feathers stayed in the air for a long time. (Children * * * blow on the same feather and fan the wind with their belongings)

4. Discuss in groups: When can you find or create wind in your daily life (when riding a bike, when driving a car, when running fast).

Third, summarize and analyze the types of wind.

1, according to the activity preparation, looking for a different wind in life.

Now please tell us what wind you found.

(1) The air conditioner blows cold air; (2) It is very cold when it is windy; (3) It is cold to open the refrigerator; (4) Typhoon; (5) Mother has a sweet taste after wearing perfume; (6) The wind in the hair dryer is very hot.

The teacher concluded that there are many different winds in life, and children find them in different ways in different places. Wind is a big family, and there are many types of wind in nature, which can be divided into grades, seasons and directions. For example, the first-class kitchen smoke is blown by the wind, the second-class wind blows the face, the third-class wind blows the leaves and floats the colorful flags, and the fourth-class wind blows the paper ...; The wind in summer is warm and humid, and the wind in winter is cold and dry.

Let children judge the level of outdoor wind according to children's songs.

2. Test dryness, humidity and wind direction.

Blow the sprayed water mist to the children with a fan, so that everyone can feel the humidity of the wind and guide the children to recall the characteristics of the wind when it rains (it is a little cold, and it feels wet when blowing on the body). Then blow the hair dryer on the child's head and feel the wind is very hot and dry!

Light candles and let the children stand with them in windows, doorways and corridors, observe the direction of the flame and identify where the wind is blowing.

Teacher's summary: The children have learned how to judge the grade, direction and dryness of the wind. These are the experiences that people have summed up in their daily lives, and these experiences will play an important role in your future life.

Further question: Do you know how the scientists in charge of weather forecasting predict the wind level and direction? (Wind vane, anemometer)

3. Hand-made weather vane.

(1) Cut both ends of red wax oil glossy paper in half and stick it on a thin stick.

(2) Insert the straw into the bottle filled with sand, and then insert the thin stick into the straw.

Fourth, the exhibition of works

Encourage children to show their weathervanes, and finally put the works together for centralized display.

Activity expansion

Give the child a homemade wind vane to observe the wind direction outdoors.

Teaching reflection

Wind is a natural phenomenon that we come into contact with every day. Although it can be met every day, it is the most familiar stranger for children. The purpose of this educational activity is to let children know some simple common sense about the natural phenomenon of wind. I mobilized the natural resources to the maximum extent and chose the real things that can be used in life to carry out this class, so that children can feel the wind for themselves. Only by letting children personally feel the existence of the wind can they realize the knowledge that can't be understood by talking alone.