1. Use various senses to further perceive the characteristics of glass, plastic cups, porcelain cups and enamel cups.

2. Understand the rules to follow when visiting.

Activity preparation:

1. Children are in groups of four, and each group has a plastic cup, a glass, a porcelain cup and an enamel cup on the table. A set of four kinds of cups (including cola) for the teacher to demonstrate.

2. Hot water and coke for the experiment, a magnet.

Activity flow:

(a) the beginning part

(The teacher takes the children outside, etc.) As the aunt of the assistant in the cup shop, the teacher stimulates the children's interest in participating in activities. "Kid, I'm an assistant aunt in the cup shop. Today, I want to invite my children to visit my cup shop. " Then I introduce some precautions during the visit, such as: don't fight, handle the cups carefully, etc. Then invite the children into the activity room.

(2) Basic part

1. Guide the children to observe the cups, enlighten and discuss the differences between these cups.

"Children, how many cups do you see in my shop?" (The child answers: Many) "Are so many cups the same?" (The child answers:No.) "Please look at these cups and tell me what's the difference?" A: There are glasses and plastic cups. )

Please find some glasses and plastic cups.

Teacher's summary: Children observe carefully. These cups are made of different materials, such as glass cups (made of glass for children) and plastic cups (made of plastic for children). What are the names of these two kinds (the teacher picks up the porcelain cup and the enamel cup) and what are they made of?

2. The teacher focuses on porcelain cups and enamel cups.

Porcelain cup: It is made of a special kind of soil.

Enamel cup: (through a simple experiment: magnets can be stuck) It shows that this kind of cup is made of iron and porcelain on the outside.

The teacher took the children to recite the names of "porcelain cup" and "enamel cup" several times. (At the same time, please ask several children to lift porcelain cups or enamel cups respectively for consolidation. )

3. Perceive the characteristics of various cups on the basis of understanding the materials used to make cups.

"Children know that the materials used to make these cups are different. What's the difference? "

A let each child in each group weigh the four cups by hand. What will they find?

Summary: Plastic cups are the lightest, porcelain cups are the heaviest, and glasses are almost as heavy as enamel cups.

B: Let each child pinch these four kinds of cups with their hands again. What can they find?

Summary: Glass cups, porcelain cups and enamel cups cannot be pinched, that is, they do not deform, and plastic cups are easy to deform. Therefore, it is emphasized that plastic cups should not be sterilized at high temperature. (Other disinfection methods can be used)

C then ask the class teacher to pour half a cup of hot water into each group of cups, and let the children touch four kinds of cups with hot water respectively. What can they find? Tell the children not to squeeze, or they will burn! )

Summary: Because of the different heat transfer speed, the glass is very hot, the plastic cup is a little hot, and the porcelain cup and enamel cup are not too hot.

Then let the students have a look and guess what's in the teacher's cup.

Summary: Glass is transparent, followed by plastic cups, porcelain cups and enamel cups are opaque.

E. finally, let the children think about it: what would happen if four kinds of cups accidentally fell to the ground?

Summary: glass is easy to break, porcelain cups are easy to break, plastic cups are not broken, and porcelain outside enamel cups is dropped. (prepare an enamel cup that has been dropped in advance for comparison. )

4. Analyze and summarize the characteristics of four kinds of cups.

Plastic cups are light, fragile and easily deformed. Do not sterilize them at high temperature.

Glass is transparent, hot water transfers heat quickly and is easily broken.

Porcelain cups are beautiful, but they are the heaviest and easily broken.

Enamel cups are durable, heavy and fragile, but the porcelain outside is easy to be knocked off.