跟讀練習: Introduction to high school physics | Khan Academy - 通過影片學習英語口語
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28 句
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Why do you fall backwards when a bus suddenly accelerates?
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What powers those launched roller coasters?
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And speaking of power, how do power stations generate electricity without using any batteries?
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We know an apple falls because the earth pulls on it, but does the apple pull on the earth as well?
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Why do astronauts in space station appear to float even though gravity still exists there?
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And why do the hottest stars in the night sky often shine blue?
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In this high school physics course, we will answer all these questions and many more.
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Physics is the science of building models to explain how the universe works.
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We take observations, describe them with math, and use those models to predict and understand the world around us.
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So what will we explore in this course?
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Well, we'll start by learning to describe motions, how to track positions, velocities, and accelerations.
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Then we'll ask, but what causes motion?
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That will lead us to the idea of forces and Newton's laws.
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We will then explore momentum and impulse tools that help engineers design things like safety cushions and crumple zones.
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Next, we dive into gravity.
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We will see how a single model can explain why apples fall on earth, why planets orbit the sun, and why astronauts seem to float inside space stations.
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Then comes electricity.
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Starting with static charges and leading up to how electricity and magnetism are connected.
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We'll discover how motors spin
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and how motion can generate energy electric current we will also explore energy how it's transformed how it's conserved
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and how it lets us model everything from roller coasters to atoms We will also dive into electromagnetic waves.
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We will learn how light behaves like a wave, helping us model how it bends, reflects and spreads.
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And how it behaves like a particle, letting us harness sunlight to generate electricity.
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But this course isn't just about watching videos.
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You will also check your understanding at every step, clear up misconceptions and apply your knowledge to real problems, building mastery as you go.
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Welcome to high school physics.
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Let's model the universe together.
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I'll see you inside.
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本課簡介
在這節課中，你將深入瞭解物理學的基本概念和原理，尤其是運動、力、重力和電力等主題。通過各種示例，包括巴士加速時的反應、蘋果為何下落以及國際空間站宇航員似乎漂浮的原因，你會學習到如何運用數學來描述和預測這些現象。這節課不僅幫助你掌握物理學相關的知識，也提高你的英語聽說能力，特別是在科學領域的詞彙運用上。
關鍵詞彙與短語
- 重力 (gravity): 物體因地球或其它天體的引力而產生的力。
- 運動 (motion): 物體改變位置的狀態。
- 力 (force): 造成或改變物體運動狀態的因素。
- 電力 (electricity): 可以被利用來做功的能量形式。
- 動量 (momentum): 物體的質量和速度的乘積，是物體運動的量度。
- 電磁波 (electromagnetic waves): 一種能在空間中傳播的波動，包括光波。
- 模型 (model): 用於描述和解釋複雜現象的簡化表示。
- 浮力 (buoyancy): 物體在流體中沉浮的能力，與重力平衡。
練習小貼士
為了提高你的英語口語練習效果，建議採用 shadow speech 技巧。在觀看這段影片時，注重模仿說話者的語速和語調，嘗試在聽的同時進行跟讀。你可以暫停影片，反覆練習每個句子，確保能夠自然流利地複述內容。尤其在講解科學概念時，注意聽清楚每一個專業術語並嘗試在日常對話中使用，幫助記憶和理解。此外，利用 看YouTube學英語 的機會，結合視覺和聽覺的學習方式，可以加深對知識點的理解和記憶，同時也提升你的 英語口語練習 技能。讓我們一起通過這些基本概念來建模宇宙吧！
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。