1. Understand the origin of rainbow phenomenon through observation and exploration.

2. Try to create a "rainbow" in various ways and get interested in the wonderful phenomena of nature.

3. Willing to communicate with peers and share the process of exploration.

Activity preparation:

Choose a sunny day.

2. A courseware, a mirror, a basin full of water, ballpoint pen, salad oil, white paper, prism, magnifying glass and bubbles.

Activity flow:

(A) to stimulate children's interest.

I achieve this through the following three small links:

Teacher: 1, children play with the mirror at will. What did the children find in the mirror in the water when they were playing with their companions?

2. Guide children to look at the sun in the water.

3. Tell me what you found. How many colors are there? How are they arranged?

(2) Understand the origin of the rainbow.

Show the courseware making in the rain and after the rain, and let the children watch how the courseware Rainbow is made. Finally, it is concluded that rainbow is a natural phenomenon after thunderstorm in summer, and it is formed by many small water droplets floating in the sky after being irradiated by sunlight. The rainbow is arranged like this: red, orange, yellow, green, cyan, blue and purple. The bright colors of the courseware on the screen stimulate the children's senses, so that their hands, brains, eyes and mouths can be used together, so that every child can fully integrate into the study.

(3) Learn to make rainbows by hand.

Teacher: "such a beautiful rainbow will soon be gone." What should we do? "

So how do you make rainbows? (With this question, let the children find their own materials, such as bubbles, magnifying glasses, prisms, ballpoint pens and white paper ... Children are free to try to make "rainbows" in various ways. The teacher observes the child's operation by setting questions and asks questions in time. Children communicate and cooperate in the process of trying to operate. )

(4) Exchange experimental results.

Children appreciate each other's "artificial rainbow", communicate with their peers what materials they use to make "rainbow", and summarize and demonstrate their own experimental process in language. Learn more about the origin of rainbow phenomenon by watching, saying and doing.

(5) Expanding activities.

After the activity, children can continue to look for various ways to make rainbows in the science exploration area, get interested in the wonderful phenomena of nature and experience the fun of success.