Activity objectives:

1, play shadow games, and get a preliminary understanding that objects have shadows.

2. Know that the change of shadow is related to the position of light and objects, and gain the experience of shadow change in the exploration experiment.

3. Use various senses, actively explore and experience the fun brought by scientific exploration activities. Activity preparation: slide projector, desk lamp or flashlight, toys, etc.

Activity flow:

1, hand shadow magic, to stimulate children's interest in exploration. "Little hands change around, turning into bouncing rabbits, barking dogs and dancing butterflies." (Encourage children to play games with little hands and small shadows)

2. Find the shadow and explore the relationship between light and shadow.

(1) Turn off the lights. Please look for the shadow. Where did it go?

(2) Let the children talk about the shadows in the sun, such as the shadows of trees, slides and children. Why do cloudy days hide shadows? Guide children to understand that where there is light, there is shadow.

3. The game Shadow Change discusses the relationship between shadow and light.

(1) Please divide the children into groups, block the light with toys and observe the shape of shadows.

(2) Guide children to explore how to make the toy shadow bigger and how to make the toy shadow smaller.

(3) Encourage children to change the position of lights and toys and explore what will happen to shadows. Summarize the experimental results: the shadow will move, the shadow will change, the position of the light source will change, and the size of the shadow will change; The posture of the object has changed, and the shape of the shadow has also changed.

4. Step on the shadow game to further consolidate the relationship between light and shadow.

Outdoor games step on the shadow. Before the activity, let the children observe their own shadows and changes in the sun, and then play in groups to guide them to think about how to prevent others from stepping on their shadows. Remind children to pay attention to safety during the game. )

Activity expansion:

Discovery activity: Will you make the shadow disappear? Through discovery, experiment, exploration and understanding, the shadow can't be covered. Without light, shadows will disappear.

The second part of kindergarten small class light and shadow courseware

Teaching objectives Scientific concept objectives:

1. Light source, occlusion and screen are the conditions for shadow generation.

2. An object that can emit light by itself and is emitting light is a light source.

3. The length and direction of the shadow change with the position and direction of the light source; The size of shadow is related to the distance between light source and shelter; The shape of the shadow of an object is related to the shape of the side of the object illuminated by the light source.

Scientific inquiry goal:

1. Do light and shadow experiments and accurately record the observation results.

2. According to the experimental results, the relationship among light source, shelter and shadow is deduced.

Scientific attitude goal:

1. Willing to listen to other people's opinions and express their own opinions.

2. Willing to study in groups.

3. Develop a rigorous, meticulous and realistic attitude in experimental observation.

Scientific, technical, social and environmental goals:

Understanding observation, reasoning and listening are cognitive activities that people often use.

Teaching emphases and difficulties

Explore the characteristics of shadow changes.

Teaching preparation

Group experiment: flashlight, rectangular building blocks, A4 paper, pencil and ruler.

teaching process

First, introduction before class

All the curtains in the classroom are pulled down and all the lights are turned off. ) The teacher introduces the hand shadow game, and makes hand shadows on the spot by using the light of the projector, so that students can judge what small animals they are according to the shadows they see. Let some students who know hand shadow perform on stage. Through the above activities, let the students know the conditions of shadow formation and guide them to say the conditions of shadow formation.

Second, knowledge construction.

Teacher: Students, we know the conditions of shadow formation. The most important thing is to have light, and if there is light, there must be a light source. Which student tried to talk about the light source you understand?

Classmate 1: an object that can emit light by itself.

Classmate 2: It should also be a luminous object. For example, the fluorescent lamp in our classroom is out now, so it should also be a luminous object.

Teacher: Both students speak very well, and both can tell the light source they understand. Actually, it's a light source, as these two students said. Who will summarize the concept of light source again?

Classmate 3: An object that can emit light by itself is now emitting light.

Teacher: Now that we know the concept of light source, can you judge which of the following objects are not light sources?

The whole class judges together.

Third, experimental exploration.

Teacher: Put a book between the projector and the whiteboard (screen). Students can see shadows. What will they find when the book moves towards the projector?

Health: The shadow becomes bigger.

What will you find when the book leaves the projector?

Health: The shadow is getting smaller.

Teacher: Through a small experiment, we found that shadows can be changed. Next, let's discuss the characteristics of shadow change. Distribute the study list (that is, 25 pages in the textbook)

1. Preparation of experimental equipment: flashlight, A4 paper, wood block.

2. Explain the requirements and objectives of the experiment.

3. Matters needing attention in the experiment process: For example, when exploring the experiment that the flashlight illuminates the same building block from different distances, it is necessary to ensure that the distance between the flashlight and the screen remains unchanged, move the building block, and observe the change of the shadow.

Without completing an experiment, I tried to draw a shadow on A4 paper (screen) and try to analyze and infer the conclusion of each experiment. Explore and discuss in groups.

After experimental exploration and discussion, classroom communication:

1, the size and direction of the shadow will change with the position of the light source;

2. The size of the shadow and the distance between the shade and the light source ...

3. The relationship between the shadow shape and the side of the object illuminated by the light source.

4. The shadow is always on the backlight side.

In communication, teachers should guide students to analyze experimental phenomena and finally draw experimental conclusions. After reaching the conclusion of each experiment, students are also required to try to draw a light diagram of the shadow on the study sheet (page 25 of the textbook), so that the position of the shadow can be roughly found and the length of the shadow can be understood by drawing.

Fourth, classroom extension.

Explain the concept of projection and its many applications in our lives.

Verb (abbreviation of verb) course summary

Guide the students to review: What knowledge of light have we learned today and what laws have we found?

Let's play a shadow game to verify these rules we have found.

Conditions for shadow generation: not only sunlight and shelter, but also screens (walls, floors, etc.). ) are needed.

Light source: it is shining, and it is its own light.

Writing on the blackboard: light and shadow

Conditions for shadow formation: light source, shelter, screen.

The concept of light source

Characteristics of shadow change

project

The third part of kindergarten small class light and shadow courseware

First, the teaching objectives

Scientific concept

1, students should know the conditions of shadow: light source, shelter, screen, and shelter should be between light source and screen.

2. Understand the criteria for judging the light source: whether it is emitting light or the light emitted by itself.

3. The length and direction of object shadow change with the position and direction of light source; The size of the object shadow is related to the distance between the object and the light source; The shape of the shadow of an object is related to the shape of the side of the object illuminated by the light source.

4. The shadows of objects illuminated from different sides are called projections, which are very useful in our life.

Process and method

1, do light and shadow experiments, and accurately record the observation results.

2. According to the experimental results, the relationship among light source, shelter and shadow is analyzed and deduced.

Emotions, attitudes and values

1, realize that the changes between things are related and regular.

2. Develop a rigorous, meticulous and realistic attitude in experimental observation.

Second, teaching preparation teacher demonstration: classroom experiment with curtains: flashlight, 4 pieces of white cardboard, rectangular small wooden block, pencil, ruler.

Third, the focus and difficulty of teaching: explore the characteristics of shadow.

Iv. Schedule: 1 class hour

Teaching process of verbs (abbreviation of verb)

2, about the conditions of the shadow.

1) Who plays the shadow game? How can I see my own shadow?

2) Think about it: How do shadows come into being? Do it yourself and see what conditions are needed.

3) On the basis of practical operation, discussion and communication, students know that shadows need not only sunlight and light-blocking objects, but also screens (walls, floors, etc.). ).

3. Teaching about "light source"

1) Shadows need light, so which objects can shine? Student count

2) Guide students to classify, emit and reflect the light of other objects.

3) Get the description of the light source: an object that can emit light by itself like an electric light is called a light source.

4. The characteristics of shadows

1) In the shadow game just now, what else can we do except know the conditions for shadow generation?

2) We will continue to explore the secrets of light sources and shadows through some activities. Now we will teach ourselves a 25-page science book to see if we understand the methods, steps and requirements of the experiment.

3) The teacher mainly prompts and demonstrates the first experiment.

4) Experiment in groups, first draw a shadow on the screen, and then draw it to the corresponding place in the textbook.

5) Report in groups. It is found that the shadow will change with the position of the light source. The relationship between the size of shadow and the distance between shelter and light source; The relationship between the shape of a shadow and the side of an object illuminated by a light source.

5. Review and summary

1) Guide students to review: What knowledge of light have we learned today and what laws have we discovered?

2) Let's play a shadow game to verify these rules we found.