That's right, if the airflow at your air outlet is exhausted, then in theory it can be used to generate electricity. If you use a fan to blow air to generate electricity, it won't work, because with. with each transformation of energy there is a loss.
In addition, because the density of air is very low, the energy carried by the wind per unit volume is very low. Therefore, to obtain relatively large power, a large diameter wind turbine must be used. Only in this way can benefits be produced, and the energy conversion limit of wind turbines is only 0.59, less than 0.6. Generally, large wind turbines are actually 0.5, so wind power generation must be increased to gain benefits.
As a teacher, you often need to use lesson plans. By preparing lesson plans, you can betterpmake appropriate and necessary adjustments to the teaching process according to the specific situation. So, what type of lesson plan is right? The following is a kindergarten lesson plan for "Naughty Wind" that I have compiled for your reference. I hope it can help friends in need.
Objectives of the activity:
1. Use your own hands to make windmills, feel the changes in the wind, and enjoy exploring the secrets of the wind. .
2. Briefly understand the relationship between wind and people's lives.
3. Cultivate children's hands-on ability through hands-on operations.
4. Be willing to explore, communicate and share.
Preparation for the activity:
1. Kites, plastic bags and materials allowing children to make their own windmills (colored paper, drawing pins, sorghum poles, small scissors).
2. About the wind (the functions and harms of the wind).
3. Children's book for upper class 2, page 10.
Activity process:
1. Take a look and talk about it:
Discussion: Today the teacher gave the children A gift arrived. Have or take a look. Do you recognize him? (Show the children the kite and encourage them to talk enthusiastically) When the teacher brought this gift, he also asked a question: How to fly it in the sky?
2. Think about it and take a look:
(1) What are the differences in wind throughout the year? (The wind in spring is gentle and warm, the wind in summer is warm, the wind in autumn is cool, and the wind in winter is cold)
(2) Do you know what people do with the the wind? (Encourage children to think about it and speak boldly. The teacher can give appropriate prompts.)
Display and let childrens take a look. The teacher summarizes: People use wind to generate electricity. The wind can dry out our planet. wet clothes and grow crops. Pollen can spread with the help of wind. Children use the wind to send kites skyward. Wind can also blow wind chimes...
Teacher: The wind. brings a lot of comfort to people's lives, but sometimes can cause serious harm.
(3) Listen, let children understand the dangers of typhoons and hurricanes: causing tsunamis, bringing down trees and houses, capsizing ships, etc. It's a natural disaster, but humans are confident that one day they can conquer it.
3. Try it and do it:
Wind can help people do many things. The wind is around us. Do kids want to play games with it?
Ask the children aboutUse the prepared materials to make windmills (remind children to pay attention to safety when using scissors)
4. Play and search:
Let the children play with the windmill and feel the impact of changes in wind speed and direction on the windmill.
(1) Let the children stay where they are, look at the windmill and talk about how fast it spins.
(2) Let the children try to walk slowly and observe the changes of the windmill.
(3) Run and let the children observe the changes in the windmill. (When children run, remind them to pay attention to safety and not let the windmill face the child's face.)
Teacher summary: The speed of rotation of the windmill is linked to the speed and direction of the wind. The greater the wind speed, the faster the windmill spins and the directionwind direction is respected.
5. Listen and learn:
The autumn wind has risen and the leaves are slowly falling. Sometimes he flies all over the yard. (Wind) Children, observe, besides the leaves blown by the wind, what other things can make the wind blow? (Plastic bags, paper)
If these wastes disappear, the environment around us will become more beautiful! (Culture the good habit of children not to throw garbage everywhere and to pick up pieces of paper when they see them)
6. Extension of the class:
children make a wind chime, try it, and hang it in the room. Which position produces the loudest sound. The activity design captures children's curiosity and uses existing life experiences to allow children to learn while constantly solving problems. Activities follow the educational philosophy of play while learning and learningweaving through play, allowing children to acquire knowledge in a relaxed and pleasant atmosphere. Firstly, knowing that wind is necessary for a kite to fly, understanding that wind helps people do many things, and also knowing the damage caused by excessive wind, but then reminding young children not to be afraid of the wind, the wind is always our friend. Have the children make it and play with it, so they can feel the “interest” of the wind. At the same time, it also allows them to explore the secrets of the wind in their attempts.
Reflection on the activity:
Get children to explore in depth again, leaving room for exploration and extension to the children. The whole activity gives the children a more relaxed atmosphere. The teacher acts only as support, encouragement, collaborator and guide in the activity, listensCarefully listen to children's expressions, sorting and summarizing them in a timely manner. The children always constitute the main body. Through observation, practical work and exploration, they gather new knowledge and experience so that they can develop their talents in practice. Of course, in children's science activities, we shouldIt is necessary to strengthen children's thinking ability, improve their independence and exploration, so that children can complete learning tasks in comprehensive links, truly master the scientific knowledge, enter into science and let the light of science illuminate the way a child grows up.