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理化-國中7-9年級(四)
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搜尋相關的資源 839
用水管隔空吸引鋁罐?│《科科學會了》把課本的「靜電(摩擦起電)」變有趣!-資源代表圖
靜電是什麼?靜電指的是電荷在物體表面不平衡分佈所引起的現象,當兩個物體互相摩擦時,電子會從一個物體轉移到另一個物體上,這種因為電子轉移而產生的電荷現象,就稱為靜電。靜電不會像電流一樣流動,它是暫時停留在物體表面的電荷,直到遇到導體或接地後才會釋放。以日常生活中的例子來說,當我們用塑膠梳子梳頭髮時,會發現頭髮變得容易吸在臉上,這是因為梳頭的過程中,電子從頭髮轉移到梳子上,使頭髮和梳子帶靜電,與臉產生吸附現象。
觀看次數558
修改日期:2026-02-23
ios
時間倒數-資源代表圖
app 時間倒數
洪琮欽/台南市網路中心國小1-4年級,國小6年級~國中9年級
Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570) 洪琮欽 時間倒數 Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570)
點閱數1727
下載數7
修改日期:2026-02-17
【自然系列-化學 |物質探索10】(中子的發現)超原子時空冒險—最終章-上集-資源代表圖
查兌克為了成功做出黃金,跑到了法國找居禮夫人的女兒~伊雷娜小姐借傳說中的超狂嘎瑪射線,進一步發現這個射線很有可能就是拉塞福說的中子!看來⋯⋯原子的秘密即將被揭開了!
觀看次數471
下載數0
修改日期:2026-02-06
【自然系列-化學 | 酸鹼02】(電解物質與酸鹼)電解大師戴維-下集-資源代表圖
瘋狂進行各種電解實驗的戴維,成為了世界上發現最多元素的男人!使得他推翻了科學史上的金頭腦「拉瓦節」的重要發現:酸裡面都要有氧。既然決定酸的關鍵不是氧,那究竟是什麼呢?
觀看次數541
下載數0
修改日期:2026-02-06
【自然系列-化學 | 物質探索07】(週期表的出現)決鬥吧!元素王-下集-資源代表圖
門德列夫參加了卡爾斯魯厄國際化學會議後,得知元素間的重量及化學性質,發現其中的規律性,以為完成元素表的門德烈夫發現如果按照重量將其填滿,元素的化學性質就會有偏移,但如果將化學性質對齊,整張表就會.......
觀看次數821
下載數0
修改日期:2026-02-06
【自然系列-化學 | 物質探索09】(質子與原子核的發現)超原子時空冒險—二部曲-下集-資源代表圖
拉塞福發現了原子內部並不像是西瓜模型,反而更像是一包洋芋片!?原來原子內部跟洋芋片一樣大多是空的,只有中心有一顆神秘的原子核,甚至成功把元素轉換成另一種元素,然而跑出了共同具有正電的粒子,這究竟是怎麼回事呢?
觀看次數466
下載數0
修改日期:2026-02-06
【自然系列-化學 |物質探索10】(中子的發現)超原子時空冒險—最終章-下集-資源代表圖
有了湯木生教授所發現的電子,和拉塞福老師的質子,再加上查兌克自己提出的中子,究竟這些粒子代表了甚麼,他該如何善用這些偉大的科學精華,一舉擊敗鍊金術師,打造出自己的第一桶金呢!?
觀看次數502
下載數0
修改日期:2026-02-06
【自然系列-化學 | 物質探索06】(分子概念的出現)傷心酒吧的分子科學家-資源代表圖
化學家亞佛加厥一直想不通,為何等體積的氫氣和氯氣反應後,總體積竟然不變?依照道耳吞原子說和給呂薩克假說,等體積氫氣和氯氣有一樣多的原子,組成氯化氫體積應該變少啊?除非有半顆原子,或是……
觀看次數519
修改日期:2026-02-06
【自然系列-物理 | 熱學01】 (溫度與潛熱)曖昧的相變化 - 熱-part2-資源代表圖
學家布萊克終於完成愛人的遺願了!他研究冰塊時發現,冰溶化時本身溫度不變,周圍溫度卻下降了。為了解釋這個現象,他提出「潛熱」認為熱可能改變溫度也可能改變物質狀態。
觀看次數466
下載數0
修改日期:2026-02-06
【自然系列-物理 | 聲學】 (聲學)聽見宇宙的聲音-part2-資源代表圖
波以耳拿玻璃罩蓋住鬧鐘,把空氣抽去,鬧鐘的聲音就聽不到了。由此他認為聲音需要媒介才能傳播,所以真空的宇宙不可能像畢德哥拉斯所說充滿聲音。
觀看次數454
下載數0
修改日期:2026-02-06