The design background of the wonderful water teaching plan 1
Water is the source of life, which is closely related to human life, animal and plant survival, production and construction. Are inseparable from boiling water and fresh water. In view of the shortage of water resources and serious water pollution, the purpose of this teaching activity is to educate children to save water.
moving target
1. Know the use and importance of water, cherish water resources and save water.
2. Through practical activities, innovative perception that sewage can be purified by multi-layer towel filtration. Cultivate children's observation ability, discrimination ability and operation ability.
3. Cultivate children's innovative consciousness, innovative spirit, imagination and creativity.
4. Cultivate children's curiosity about things and be willing to explore and experiment boldly.
5. Cultivate interest in exploring nature.
Important and difficult
Children can combine their own life experience, creatively find and solve problems in operation and telling activities, and improve their awareness of bold thinking and innovation.
Activities to be prepared
Video, container full of dirty water, clean empty cup, pen, paper, towel, screen, gauze, sponge, big jelly box.
Activity process
1, riddle import.
Knives are seamless, guns have no holes, axes have no cracks, and there are no teeth to bite. The answer is water.
2. Children discuss what is the use of water: inspire children to talk about the use of problem water boldly according to their own life experiences and discoveries. Water can be used for washing clothes, watering flowers, raising fish, bathing, washing face, making soup and cooking porridge.
3. Expand children's knowledge: show videos about wastewater discharge and reuse.
4. Children imagine thinking and innovate new ways to save water: how to save water in life? (For example: washing clothes, washing vegetables, watering flowers with fruit, turning off the tap, installing new water-saving devices, etc. ).)
5. Understand the importance of water: human beings, animals and plants can't live without water, so we should all take good care of water resources and save water.
6. Exploration of innovative operation activities: Explore how to clean the experimental water, show a basin of dirty water, and let children think about how to make the water clean.
Children's discussion:
Try how to purify water.
Tell me why the experimental results are different.
D how to filter with a towel to make the water cleaner?
7. Enhance children's interest in innovative activities: children summarize their own discovery process through recording and further cultivate their innovative consciousness.
Large class science wonderful water teaching plan Part II Activity objectives:
1, understand the relationship between concentration and water through experiments, and be interested in scientific phenomena.
2. Be able to describe what you see in your own language and be willing to communicate with your peers.
3. Cultivate children's curiosity about things and be willing to explore and experiment boldly.
4. Willing to try boldly and share experiences with peers.
5. Learn to record your findings in various forms such as language and symbols.
Activity preparation:
Teacher: Red saturated sugar water and transparent water.
Children: A rag is for everyone.
First operation: ordinary red water and transparent water (one for each person)
The second operation: ordinary red water and transparent water (one for each person),
Sugar (one for each group) spoon (one for each person)
The third operation: @ Red Saturated Sugar Water (one for each group)
@ Sugar (one for each group) Spoon (one for each person) Ordinary red water and transparent water (one for each person)
Activity flow:
First, teachers perform magic tricks to stimulate children's interest in activities.
1, import, children guess.
Teacher: Today, Teacher Xie is going to perform a magic trick for the children. Please have a look. What does the teacher have? Please watch carefully. What happens if the teacher pours the red water in his hand into transparent water?
2. The teacher's experiment.
Teacher: Please look carefully. The teacher slowly poured the red water into the transparent water. Can it be turned into two floors?
Second, children try to explore experiments.
1, try it.
Teacher: So, children, do you want to make this magical water? Now please try the water on the table and see if you can make such wonderful water.
2. Discussion:
Teacher: Have you succeeded, children?
Teacher: Why didn't you succeed? Think about it and talk to the children next to you. )
Third, show the mysterious additive "sugar" for children to explore.
1, show me the sugar.
Teacher: Because there is something new in the teacher's water, and there is nothing in your water. What is this? (sugar)
Teacher: There is sugar in the teacher's water, but do you see sugar? Where is the sugar?
Summary: Sugar is soluble in water, so we can't see it.
2. Children conduct exploratory experiments.
Teacher: Please try again with the materials on the table this time!
3. discussion.
Teacher: Children, did you succeed this time?
@ It worked. How did you do that? (share with you the method of success)
@ It didn't work. Why not add sugar? (children's discussion)
Summary: put a lot of sugar.
Fourth, it shows red saturated sugar water. Children's exploration
1, showing saturated red water, for children to observe and discuss.
Teacher: Please look at the teacher's red water with a lot of sugar. (Children watch and discuss)
Summary: The teacher's water is sticky.
2. Children's experiments.
Teacher: Let the children put their own things on the table, put a lot of sugar, and try again when the water becomes sticky!
3. discussion.
Teacher: Did you succeed this time?
(2) Teacher: Why does the sugar-red water sink? (children's discussion)
Summary: There is a lot of sugar in the water. When so much sugar is dissolved in water, the water becomes heavy. And heavy things will sink to the bottom of the water.
Verb (abbreviation of verb) promotion activities
Son, putting sugar in red water can turn it into two layers. What happens if you add salt?
And then what? What happens if you put sugar in transparent water? Go home and try it with mom and dad! Finally, clean the table yourself.
Activity reflection:
The new "Outline" points out that science education for children is a scientific enlightenment education, which focuses on stimulating children's cognitive interest and exploration desire, creating conditions for children as much as possible, using various senses, using hands and brains, exploring problems, solving problems and experiencing the fun of discovery.
The third part of the wonderful water teaching plan of the science big class is the background of activity design
The knowledge used in this activity is about saturated solution and changing liquid density. Saturated solution: a solution that can no longer dissolve solute in a certain solvent at a certain temperature. Method of increasing solvent density: adding solute. The scientific principle of this activity lies in dissolving sugar in water to make a saturated solution, which increases the density of the solution and sinks to the bottom of the water.
moving target
1. By feeling the changes of different waters, children's initial desire to explore can be germinated and the fun of success can be experienced.
2. Guide children to try, perceive and find saturated solutions.
3. Let the children be willing to communicate the experimental process and results with their peers in their own language.
4. Cultivate children's curiosity about things and be willing to explore and experiment boldly.
5. Cultivate the ability of cooperative inquiry and recording experimental results with symbols.
Teaching emphases and difficulties
Try to make your own saturated solution.
Activities to be prepared
Two glasses of colored water, two glasses of transparent water, sugar, spoon and chopsticks. This material can be used by children.
Activity process
1. Have a look and think.
Dialogue lead-in: "Look, children, what is the teacher's hand?"
I'm going to do a magic trick and pour red water into transparent water to see what happens.
While talking about the process, the teacher emphasized that colored water should be slowly poured into transparent water.
Is this glass of transparent water the same as before? It's different. What's different? Is the red water above or below the cup now?
2. Give it a try:
Children, do you want to make such beautiful water? Now please try the water on the table and see if you can make such wonderful water.
(The teacher provides the child with a glass of transparent water and a glass of red water respectively, so that the child can pour out and see if he can pour out two layers of water. )
3. Say:
Lead: What happened to your transparent water?
The teacher asked the children to speak out their experimental methods and results boldly. )
Want to know how the teacher's magic is done? Don't worry, look at the big screen first. (Play the courseware)
What do you see?
Did the experiment on the screen succeed? Why? (Because it is divided into two layers like the teacher's water)
How did he do it? (Please feel free to answer)
Please observe the difference between the teacher's colored glass and yours. (There is no melted sugar, and the water is very thick) Because the teacher added a lot of sugar to the water, until the water was full of sugar, I couldn't eat any more and became a saturated solution. Water becomes heavier after eating so much polysaccharide. Heavy things will sink to the bottom, so the saturated solution full of sugar will sink to the bottom, and transparent water will become two layers.
4. do it:
Let the children make wonderful water with things on their desks (a glass of colored water, a glass of transparent water and sugar). The teacher instructed the children to put the sugar into the transparent cup with a small spoon, emphasizing that more sugar must be put until the sugar can't melt in the water. Slowly pour the red water with sugar into the transparent water. Please watch carefully. Is Miaoshui made?
share
Put your wonderful water on the teacher's desk and tell each other how you do it. What was the result? (It is obviously layered, or a little shallow layered, or no layered)
6. Expand:
Let the children think about what else can make a saturated solution in water. Go home and try it yourself.
Teaching reflection
The scientific activity "Wonderful Water" is very suitable for children in large classes. The children in the big class are curious and want to have the opportunity to make their own favorite things. This activity is not difficult, but it is easy to see the results, so that children can strengthen their self-confidence through successful results Through this activity, children's observation ability, comparison ability and hands-on operation ability have been developed to a certain extent, and their language expression ability has also been greatly improved.
Observation record
Forty-four children took part in the activity, and each child showed great interest in the experiment. Putting ordinary red water into transparent water for the first time, the children were disappointed not to see the phenomenon of stratification, and several children looked at the teacher with envy. In the process of making sugar water for the second time, the children know that a lot of sugar is put in, and 7 children mix it evenly with a small spoon, and the viscosity is also very good. However, a dozen children did not dare to put sugar boldly, but carefully scooped a little sugar with a small spoon, and later put some sugar under the guidance of the teacher. Most children poured the prepared sugar water into transparent water, and 23 children succeeded. They shouted happily, "Teacher, look, my water is so beautiful." Nine children also succeeded. However, they stirred the water several times with a small spoon, and as a result, the layered water turned into red non-layered water. 17 children didn't succeed because there was less sugar, the sugar water was not saturated, and the density of water didn't increase much, so the two kinds of water were mixed together without stratification.
Wonderful Water Teaching Plan for Science Big Class Part IV Activity Objectives:
1, can be interested in scientific phenomena and sprout the initial desire to explore.
2. In the experiment, it is found that salt dissolved in water will increase the buoyancy of water, and the more salt, the greater the buoyancy.
3. Willing to express what you see in your own language, and willing to communicate with peers.
4. Cultivate children's interest in exploring scientific phenomena.
5. Cultivate children's observation ability and hands-on operation ability.
Activity preparation:
Cups, grapes, salt, recording paper, video "Dead Sea" related information.
Activity flow:
First, stimulate interest, lead to activities
1, dialogue lead-in: "Children, do you remember how to make eggs float?" (Children recall experiences)
2. The teacher questioned the summary: Why can salted eggs float in water? It turns out that salt dissolves in water, which increases the buoyancy of water and the eggs float. (Children say one by one: buoyancy)
Second, children's operational activities
Transition: Does it mean that objects can float with salt? (children guess)
1, what the hell is that? We'll try it ourselves later. On the table, the teacher prepared a glass of water for each of you, asking you to add 1 salt at a time, fully stir with chopsticks, and add grapes to see what the result is. And record it on paper. Remember: try to remember it once.
2, children's operation
3. Communication: I found that the children at table 1 responded quickly. Can you tell them what they found? (Group 1: I added 1 and 2 packets of salt, but the grapes didn't float. When I added 3 packets of salt, the grapes floated. )
4. Why did you add 1 packet and 2 packets of salt, but the grapes didn't float? Can the grapes float after adding 3 bags? (more salt)
5. Teacher's summary: Yes, the water is 1 with salt, and the buoyancy is very small, so there is no strength to hold up the grapes. Adding two packs of salt, the buoyancy is still too small. Only when the water drinks enough salt can it have a certain strength to hold up the grapes and make them float. It shows that the more salt, the greater the buoyancy.
6. Which group would like to present your findings? (Group 2: I added 1, 2, 3 packets of salt, and the grapes did not float. When I added 4 packets of salt, the grapes floated. )
7. The teacher questioned: Just now, you introduced your findings, and the teacher had a doubt: Why can grapes float when table 1 only adds 3 packets of salt, while table 2 adds 4 packets of salt and table 3 adds 5 packets of salt? (Observing the water in three cups,) How much water is there?
8. You all found it. (Show the brand) 1 Table has the least water, Table 2 has more water and Table 3 has the most water) Oh? Is there a relationship between water quantity and salt addition? What does it matter? (children's discussion)
9. Summary: The more water, the more salt you need to drink. Only when the water is full of salt can it hold up the grapes and make them float.
Third, watch the video
1. Can our people float except eggs and grapes? I'm telling you, in fact, our people will float. Do you believe it? Let's watch a video.
2. Children watch videos
3. It's amazing! Who can say: Why can people float? It turns out that this is not an ordinary sea, but a dead sea. Its salt content is 6 or 7 times higher than that of our ordinary seawater, and it is very buoyant. No wonder we can all lie on it.
Four. Promotional activities
Just now, some of our children floated all the grapes. Can we make them sink again? You can try it yourself.