What paper absorbs water in the science experiment class of kindergarten large class

**Water absorption of different papers.

Absorbent paper absorbs water. It's that simple.

Objectives: 1. Compare the results of water droplets on different papers through experiments, and make simple experimental records;

2. Be able to find the phenomenon of different water absorption speed and degree due to different paper, and use this phenomenon to solve problems in life;

3. Enhance interest in experimental activities and exploring things.

Preparation: glass jar, paper flowers, various pieces of paper, two pieces of white paper; One copy of the record paper per person, one copy of water, cloth, and basket for each group.

Process: 1) The phenomenon of paper water absorption was discovered.

1. Show the paper flowers, and now put the paper flowers in the water, what will happen? (The flowers are open, the petals are wet).

2. Why do paper flowers bloom in water?

3. Summary: Because paper will absorb water, the flowers made of paper will open after absorbing water.

b) Compare the results of water droplets on different sheets.

1. Will the question paper absorb water? The teacher explained the experimental method: put water on the paper, patiently observe for a while, and then make a mark next to the absorbent paper;

2. Children's operation experiments, teachers tour observation;

3. What did you find when the children discussed the results of the experiment? How do you know? The teacher pasted the results of the children's discussion on a piece of paper and divided them into two categories: absorbent and non-absorbent.

4. Summary: Some of the various papers in life absorb water, some do not absorb water, when the water drops on the surface of the paper, the water disappears immediately, or slowly penetrates into it, then these papers will absorb water; When water stays on the surface of the paper, the paper does not absorb water.

c) It was found that the water absorption rate of the paper was different.

1. Is the water absorption rate of the question paper the same?

2. Teacher's operation experiment: paper climbing competition, children's observation and discussion, what did you find? What do you find different about pieces of paper? Ask individual children to touch and see (thick, thin, smooth and rough);

3. Summary: The speed of water absorption of different paper is not the same, the material is different, and the speed of water absorption is also different, such as napkins, crepe paper, which is very thin and rough, absorbs water quickly and more, and white cardboard is smooth and thick, and absorbs water slowly and less.

4) Choose paper to solve problems in life.

1. Paper brings a lot of convenience to our lives, people make a variety of absorbent and non-absorbent paper according to their needs, please choose the right paper;

2. What kind of paper should I choose to wipe sweat in hot weather? What kind of paper should I use for gouache? What kind of paper should I use to pack leftover food such as biscuits, candies, etc.? and give reasons.

Extension: There are some very special papers in life, such as paper that is not afraid of water, etc., which we will further study in the following activities.

Objective 1: Understand the fiber orientation characteristics of facial tissues.

2. Feel the magic of facial tissues and germinate interest in scientific phenomena.

3. Cultivate observation ability and hands-on operation ability.

Preparation for the activity A number of facial tissues, a bottle with a handle (filled with water) for each person, newspapers, white paper, crepe paper, cloth, etc.

Activity process 1. Game: Carry a bag 1. The teacher shows the tissue and the bottle: Today the tissue is going to play with the bottle, and the method of the game is:

Use a thin tissue to pick up such a heavy bottle, you can't carry it directly by hand, you can only ask the tissue to help. What's your best idea?

2. Children try and play, and teachers patrol.

3. Organize exchanges, invite children to show how to carry them, and teachers will comment.

4. Children play again.

5. Organize exchanges: Why can some people pick it up, and some of them break when they carry it?

6. Divide the male and female characters into different directions to try to roll the tissue, and then carry it. M: Roll along the short side. F: Roll along the long side. Swap attempts again.

7. Organize exchanges: What secrets have you discovered? (The bearing capacity of the long side is large).

In fact, there is a secret hidden in the tissue. Want to unlock the secrets of facial tissues? Let's play a game of tearing paper, tearing the short side first, then the long side, and see what difference we can find.

2. Children's games, teachers' tour guidance.

3. Organizational exchanges: What's the difference? (It can be torn into strips along the long side and shredded along the short side.) )

4. Reveal the trend characteristics of paper fibers: The secret hidden in facial tissues is the direction of paper fibers (use a marker pen to mark the direction of paper fibers while talking). We twist the tissue paper into a rope along the fiber direction, and the fibers of the paper are combined to resist the external pulling force, so that the paper rope can carry the bottle.

3. Game: Pull the big saw 1. Introduce the gameplay: Draw a tissue and tear it on the edge of the paper first.

Find the direction of the fiber of the paper, roll it again, make a tissue cord and hook it with a good friend on the other side of the table, pull it and stare at it, and recite the nursery rhyme while playing: "Pull the big saw." Pull the big saw, go to the theater at the door of grandma's house, you go too, I will go too, everyone will go to the theater together.

2. Children's games.

4. Connecting with reality and expanding thinking 1. Teacher: There are paper fibers in facial tissues, and what other paper also has paper fibers? (Children take their own paper, white paper, and crepe paper, look for the direction of the fibers inside, and mark them with a pen.) )

2. Teacher: There are fibers in these papers, can you still find other things with fibers? (Show the cloth and ask the child to go home and play with the cloth with the family to find out where the fibers of the cloth are going.)

Objectives:

1. Compare the results of different papers in water through experiments, and make simple experimental records; 2. It can find the phenomenon of different water absorption speed and degree due to the difference of paper, and can know the approximate time.

3. Enhance interest in experimental activities and exploring things. and use this phenomenon to solve problems in life; Preparation for the activity: crepe paper, tin foil, cardboard, blow molding paper, kraft paper, whiteboard paper, rice paper, etc.

Activity process: 1 The teacher asks questions and asks the children to guess: What will be the result if you put these papers in water?

2 Experiments on children's operations.

Children can choose to experiment in a basin of water or find a container to do the experiment on their own.

Teacher's guidance: Instruct children to put the paper in the water, patiently observe for a while, count for a few seconds, the paper will completely absorb the water and sink to the bottom.

Compare which paper absorbs water faster and which paper absorbs water slowly.

What is the difference between paper after it absorbs water and paper that does not?

Observe what other phenomena are there besides water absorption.

3 choose paper to solve the problems in life paper brings a lot of convenience to our lives, people need to make a variety of absorbent and non-absorbent paper, please choose the right paper: hot weather to wipe sweat what kind of paper? What kind of paper should I use for gouache?

What kind of paper should I use to pack leftover food such as biscuits, candies, etc.? What kind of paper do you use to wipe tables? and give reasons.

Objectives:

1. Through operation activities, observe whether various objects in life absorb water, and what changes will occur after absorbing water.

2. Experience the joy of group work and learn to record observations.

3. Enhance interest in scientific exploration activities.

Preparation for the activity: 1. One copy of napkins, corrugated paper, newspapers, wooden blocks, sponges, cotton, tin foil, and raincoat cloth per group.

2. A record sheet and a pen for each person.

Activity process: 1. Small experiment - a note that absorbs water.

Today the teacher is going to do a magic trick for everyone.

The paper strip made of a paper towel is placed vertically into a plate filled with colored paint, and the paper slowly changes color.

Discussion: 1. Put the paper in the paint water, what did you find?

2. Why does the water "climb" up?

Teacher: The paper towel changes color because it sucks the paint water in, so what other things in our lives can also absorb water?

2. Understand the materials and explain the operation methods.

1. Show the items one by one and recognize them.

2. Show the big **, know that the first line is the name of the item, everyone collectively guesses and judges, can absorb water, can not absorb water, can not be sure of the hit?

3. The children are divided into groups to record the guessing results, which are recorded in the first line of **, and the teacher is on a tour to guide.

4. Speak collectively, and choose a representative from each group to talk about the results of the group discussion.

3. Children's group experiments.

1. Children operate in small groups.

Put various items in the water, test whether they can absorb water, and record the results of the experiment in the second line.

2. Verify the guess results.

Everyone compares the guess results with the experimental results to see which one is more controversial and can be experimented again.

3. Teachers and children jointly summarized the results of the experiment and found that napkins, corrugated paper, newspapers, wooden blocks, sponges, and cotton all have water absorption, while tin foil and raincoat cloth have no water absorption.

Fourth, the extension of activities.

The teacher places some slow-absorbing and untested items in the corner of the area, and asks the children to try them out on their own and keep a record of them.