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Does the scientific discoloration of the middle class belong to the field of mathematical cognition?
It does not belong to the field of mathematical cognition, but a scientific activity.

I. Activity objectives

(1) Review and consolidate the understanding of red, yellow and blue.

(2) Through magic game activities, feel the phenomenon that two colors are mixed into new colors, and experience the fun of discovery.

Second, the activity preparation

(1) There are 1 transparent bottles filled with less than half a bottle of water, and two bottle caps, each of which is painted with red, yellow and blue pigments.

(2) Red, yellow and blue plastic baskets.

(3) Record form

Third, the focus of the activity

Understand the little secret of pigment being dissolved and discolored by water.

Fourth, the difficulty of activities.

Through magic games, we can perceive the phenomenon that two colors are mixed to produce a new color and experience the fun of discovery.

Verb (abbreviation of verb) activity flow:

(A) the introduction of "magic" to stimulate children's interest.

Teacher: The teacher brought something today. Let's count to one, two, three. Please come out!

Teacher: What's in the bottle?

Student: (Answer) Teacher: Is the water baby in the bottle colored?

The teacher concluded that water is transparent, colorless and tasteless, and will flow.

Teacher: Water babies are fun. Now it will play a magic game with us, and we will read the spell "water baby, change, water baby, change!" " He will change. Shall we try? (The teacher shakes the bottle to let the water touch the pigment in the bottle cap) (Playing music) Teacher (Mystery of tone): Wow, how is the water baby?

Student: (Answer) Teacher: The water baby has changed color. Have fun! Now please be a little magician.

(2) Explore for the first time, and initially perceive the secret of water baby's discoloration.

1. Guide children to explore freely.

Teacher: The teacher put a bottle in front of the children. Listen carefully. Each baby can only take one bottle. Let's learn magic tricks from the teacher and say the curse: "water baby, change."

Student: (children operate) (play music) Teacher: Did your magic work? What color has the water baby become?

2. Consolidate the understanding of red, yellow and blue.

Teacher: Let me see (the big water bottle). What color is that?

Student: (Answer) Teacher: Now it wants to find a water baby like it. * Where is the colored water baby? (Color the water baby with the picture frame) Mom is going home with the water baby!

3. Interpretation of the Secret Master: Strange, how can the water baby change color?

(Children guess) There must be a secret. Let's look for it. The teacher shakes the bottle without pigment and the bottle with pigment again. ) teacher: what did you find?

Student: (Answer) Teacher: Why hasn't this bottle changed and the other bottle has?

Student: (Children guess) (Observing the bottle) Teacher: (Prompting to observe the bottle cap) Student: (Answering the observation results, some children must have discovered the secret) Teacher's summary: Haha, (The lesson plan comes from Teacher Qu's lesson plan network) (xx is right, so it can be seen that the observation is very careful, and science should observe it carefully) (At the same time, open the bottle cap and let the children say: What secret have you discovered? The teacher concluded: Actually, the teacher put paint in the bottle cap. The pigment in the lid becomes colored water as soon as it enters the water, but it cannot be changed without the pigment in the lid.

(3) In the second exploration, the change of two colors was sensed by exchanging bottle caps.

The teacher has a bottle of colored water in his hand. Now I want to invite another color to be friends with it. What happens if two colors are together? Do you want to know? Let's take a closer look.

Teacher: (Love Tips) Remember to tighten the bottle cap, or the naughty water baby will run out. (Teacher checks whether the bottle cap is tightened) Teacher: (Group 1) (PPT demonstration) Red+Blue Student: Try to mix two different colors together after changing the bottle cap and observe the color changes. (chanting while shaking) (playing music) Teacher: Has the water in the bottle changed? What color did it become?

Student: (Answer) Teacher: (Summarize the results) (PPT demonstration) Teacher: (Group II) (PPT demonstration) Red+Huang Sheng: Try to mix two different colors after changing the bottle caps and observe the color changes. (chanting while shaking) (playing music) Teacher: Has the water in the bottle changed? What color did it become?

Student: (Answer) Teacher: (Summarize the results) (PPT demonstration) Teacher: (Group III) (PPT demonstration) Huang+Lan Sheng: Try to mix two different colors together after exchanging bottle caps and observe the color changes. (chanting while shaking) (playing music) Teacher: Has the water in the bottle changed? What color did it become?

Student: (Answer) Teacher: (Summarize the results) (PPT demonstration) Teacher's summary: Wow, the colors are really interesting. It turns out that different colors will become another new color when mixed together!

Summary of activities Today, our children are very capable and have produced so many beautiful colors. Let's take this secret to the region to play again and create more different colors!

The expansion of intransitive verbs;

Looking for colors today, our children are very capable and have produced so many beautiful colors. In fact, there are many other colors in our life. Children, you can find the same color as our baby bottle in the classroom, or you can find a different color.