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1、-范文最新推荐- 幼儿园大班活动教案:声音的利与弊 主题生成： 幼儿近段时间经常大声说话，使用工具不会轻拿轻放，弄出很大的噪音，为了让幼儿有一个良好、安静的生活、学习环境，我们就进行了声音的主题活动，与幼儿一起探讨声音的利与弊。 活动目标： 1、引导幼儿了解声音的产生，初步知道声音是由振动引起的。 2、了解声音的作用及噪音对人类、自然界的祸害，初步懂得减少噪音的方法。 活动一：寻找声音 1、 谈话：我听到的声音 幼儿的话： 我听到火车呜呜的声音、 我听到汽车笛笛的声音、 我听到冰箱发出的声音 我听过老虎的叫声 我听到打雷的声音 我听过高山流水的声音 我听过下雨的声音，滴答滴答，哗啦哗啦 2、绘
2、画：我听到的声音 活动二：人是怎样听到声音的？ 通过图片讲解，引导幼儿认识耳朵的结构，从而了解到人是怎样听到声音的。 活动三：实验探讨 1、 怎么会有声音？ （1）提供多样的材料让幼儿在实验中探索声音产生的原理-物体震动就会产生声音，不同的物体就会发出不同的声音。 （2）提供记录材料让幼儿记录实验结果，并让幼儿讲述记录结果。 2、 声音是怎样传播的？ 提供不同的材料让幼儿进行实验，从而知道不同的材料声音传播的速度不同。 3、怎样减少噪音 提供不同的材料让幼儿进行实验，使幼儿知道减少噪音的方法。 活动四：分享-声音的秘密 1、统计：幼儿用绘画的形式表现自己对声音的了解。 2、游戏：通过竞赛的形式
3、让幼儿用语言表达自己对声音的了解。 3、展示幼儿设计的作品：净化（减少）声音器 主题小结： 通过主题探讨活动，幼儿对声音有了更深的认识，知道声音对我们的利与弊，都会说出保护我们耳朵，保持环境安静的方法与措施；日常生活中幼儿也能注意降低自己说话的音量，轻拿轻放的习惯也正在慢慢形成，整个生活学习环境也比主题活动前有了较大的改观。 youth青春有关的英语演讲 Ladies and Gentlemen , Good afternoon! I’m very glad to stand here and give you a short speech. today my topic is y
4、outh。 I hope you will like it , and found the importance in your youth so that more cherish it. Youth is not a time of life, it is a state of mind ; it is not rosy cheeks , red lips and supple knees, it is a matter of the emotions : it is the freshness ; it is the freshness of the deep springs of li
5、fe . Youth means a temperamental predominance of courage over timidity of the appetite , for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20 . Nobody grows old merely by a number of years . We grow old by deserting our ideals. Years wrinkle the skin , but to g
6、ive up enthusiasm wrinkles the soul . Worry , fear , self –distrust bows the heart and turns the spirit back to dust . Whether 60 of 16 , there is in every human being ‘s heart the lure of wondersthe unfailing childlike appetite of what’s next and the joy of the game of living . In
7、 the center of your heart and my heart there’s a wireless station : so long as it receives messages of beauty , hope ,cheer, courage and power from men and from the infinite, so long as you are young . When the aerials are down , and your spirit is covered with snows of cynicism and the ice of
8、 pessimism, then you are grown old ,even at 20 , but as long as your aerials are up ,to catch waves of optimism , there is hope you may die young at 80. my own dream英语比赛演讲稿 Every one has his own dream.When I was a little kid ,my dream was even to have a candy shop of my own .But now ,when I am 16 ye
9、ars old ,standing here ,my dreams have already changed a lot. I have got quite different experience from other girls.While they were playing toys at home,while they were dreaming to be the princesses in the story .I was running in the hard rain,jumping in the heavy snow,pitching in the strong wind.N
10、othing could stop me ,because of a wonderful call from my heart - to be an athlete.Yeah ,of course ,Im an athlete,Im so proud of that all the time . When I was 10 years old ,I became a shot-put athlete.The training was really hard ,I couldnt bear the heavy shot in my hands .But I always believe that
11、 god only help those who help themselves.During those hard days,I find I was growing more quickly than others of the same age.To be an athlete is my most correct choice.But,I quit my team after entering high school because of a silly excuse.I really didnt want to stop my sports career anyway. Today
12、I say to you my friends that even though I must face the difficulties of yesterday ,today and tomorrow .I still have a dream .It is a dream deeply rooted in my soul. I have a dream that one day ,I can run,jump and pitch just like I used to be. I have a dream that one day , I can go back to my dream
13、sports and join the national team. I have a dream that one day ,I can stand on the highest place at the olympic games.With all the cameras pointing at me.I will tell everyone that Im so proud to be a Chinese athlete! This is my hope .This is the faith that I continue my steps with! With this faith ,
14、I will live though the strong wind and heavy rain ,never give up ! So let victory ring from my heart,from all of you.When we allow victory to ring .I must be the one! In my imagination,Im a bird ,a magical bird.I carry my dreams all with me by my big wings. I fly though the mountains ,though the forests ,over the sea,to the sun ,the warmest place in the aerospace! 7 / 7