쉐도잉 연습: What is Plate Tectonics: Crash Course Geology #10 - 영상으로 영어 말하기 배우기
레슨 만드는 중...
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Almost.
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All the planets, earthquakes, and volcanic eruptions happen in one place: the Ring of Fire!
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No, really.
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That's what it's called.
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Dope, I know!
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Nearly the whole Pacific Ocean is bordered by this treacherous region.
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We're talking the sights of some of the biggest earthquakes ever recorded.
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Massive volcanoes in Indonesia, Russia, even Antarctica.
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Huge explosions and fractures that happened on land and underwater.
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you But why?
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What makes the Ring of Fire so...
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fiery.
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Hi, I'm Sage, and this is Crash Course Geology.
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The Ring of Fire came about thanks to a billions of years -long process, where all the continents, all the ocean floors,
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Everything that makes up Earth's outermost layer shifts around, pulling apart, crashing into each other, What's that, Dwayne?
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Oh yeah, that does sound like one of your family reunions.
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Let's break down how all that works.
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Earth has three main layers: crust, mantle, and core.
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Its rigid outer shell, called the lithosphere, is made up of the crust, and the uppermost part of the mantle.
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But the lithosphere isn't just one solid piece of Earth.
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It's broken up into plates: huge slabs of rock that are puzzle pieced together.
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They're generally composed of both continental lithosphere, which makes up the land we can see, and oceanic lithosphere, which makes up the seafloor.
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Continental lithosphere is made up of mostly thick, lightweight granite, while oceanic lithosphere is made of denser, heavier rocks like basalt and gabbro.
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Roughly 95 % of Earth's surface is made up of seven major plates, with the rest covered by much smaller ones.
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And underneath those plates is the asthenosphere, where intense heat from Earth's core warms up the mantle rock so much that they flow around and bend like taffy.
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convection currents, or heat -based flow cycles.
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And those currents power important forces that move Earth's plates and one big geologic slow dance called plate tectonics.
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Plate tectonics shapes our world, literally.
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And all the action happens where plates meet: at their edges, called plate boundaries.
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Like, at divergent boundaries, plates move away from each other.
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As oceanic plates diverge, the hot mantle rock wells upward and some erupts as lava, which cools and hardens into new oceanic crust.
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This process is called seafloor spreading, and it's mainly generated by ridge push, downward and pushes away the older crust.
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When continental plates diverge, the Earth's crust thins and breaks apart, creating features called rift valleys.
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We can see this happening in East Africa, where the Nubian and Somalian plates started pulling apart about 25 million years ago.
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Meanwhile, at convergent boundaries, plates move toward each other.
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When a dense oceanic plate meets a more buoyant continental plate, a process called subduction happens.
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The denser plate slides underneath the other one, returning that rock to the mantle.
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This is primarily thanks to slab pole, the gravitational force that yanks plates downward.
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And this is largely what happens in the Ring of Fire: it's full of subduction zones.
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As the oceanic plates slide deep underground, they release water into the hot rocks above, which has an explosive result.
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tons of volcanic activity.
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And if two dense oceanic plates meet at a convergent boundary, subduction can create huge depressions in the surface, like the Ring of Fire's Mariana Trench,
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which contains the deepest point in the world.
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It's on Dwayne's bucket list.
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Now, when two continental plates converge, watch out!
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Because instead of subducting, they'll smash into each other, forming massive mountain ranges like the Alps and the Himalayas.
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When continental plates converge with oceanic ones, the continental plate usually wins, staying on the surface as the denser stuff is forced down.
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But it's not always a competition.
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Sometimes, plates move past each other, at spots called transform boundaries.
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You can think of these plates like pieces of sandpaper.
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They don't easily slide past each other.
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Eventually that stress reaches a point where the ground moves with a jolt, aka an earthquake.
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The San Andreas Fault in California is a transform boundary that has had many earthquakes, like the Loma Prieta earthquake in 1989, which folks in my neck of the woods still talk about.
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But that kind of ground rattling can happen at all types of plate boundaries when there's enough stress.
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Plate movements have shaped what the Earth's surface looks like throughout our planet's history.
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In fact, at multiple times in Earth's past, the shifting tectonic plates have caused all the continents to collide and form one giant supercontinent,
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the most recent hundred million years ago.
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It's like seeing Earth in her awkward phase.
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So yeah, plate tectonics has been happening for a long time,
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keeping the Earth's surface in constant motion for something like three billion years.
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The continents move an average of about 1 .5 centimeters a year.
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That means that, in all of recorded human history, the ground below you has shifted probably about...
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76 meters.
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That's only about as wide as a professional soccer field.
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That creeping movement is way too slow to feel.
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So, How do we know it's actually happening?
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Way back in the 1910s, German geologist Alfred Wegener looked at a map of the world and noticed that the continents looked like they fit together, almost like puzzle pieces.
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And he built a theory to explain what he was seeing: continental drift.
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He believed that the continents were moving slowly around the Earth, together and apart, drifting through the crust like icebergs in the ocean.
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He's even credited with coming up with the name Pangaea, meaning "all of the Earth." But the geological community dunked on Wegener pretty hard.
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that the continents formed and moved vertically, not horizontally, driven by the heating and cooling of Earth's surface way back when it formed.
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But Wechner was on to something.
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And his idea laid a foundation that other geologists built on.
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Let's hang out with some of my geology rock stars!
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For a long time, we had no clue what the seafloor looked like.
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Most geologists thought it was just flat.
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In the 1950s and '60s, American geologist Marie Tharp and her collaborator Bruce Heazen used sonar to map it.
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Given the culture at the time, Bruce got to gather data aboard research ships, while Marie was forced to stay on land and make maps.
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'cause she was a lady.
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With pens, ink, and rulers as her tools, she and her colleague, Hester Herring, methodically plotted each data point.
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And what the team discovered was incredible.
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Not a flat, barren wasteland, but a 40 ,000 -mile underwater mountain range that circled the globe like a seam on a baseball.
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This was a major point in favor of plate tectonics theory.
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Over the course of several years, Tharp and Hiesen worked with Austrian artist Heinrich Barron to paint an accurate map of the entire seafloor.
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And in 1977, The World Ocean Floor Panorama was published.
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Twenty years later, Tharp was named one of the four greatest cartographers of the 20th century by the Library of Congress.
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In 1999, Tharp said that at the start, "I had a blank canvas to fill with extraordinary possibilities.
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And she did just that.
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It took decades and many lines of evidence for the theory of plate tectonics to develop and gain consensus.
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But the combined efforts of geologists across the world brought us to the conclusion that really does move underneath our feet.
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And that consensus didn't look like a bunch of geologists saying, "Eh, Sounds about right.
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Science historian Naomi Oreskes called it:
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"The first theory to ever be accepted in the entire history of Earth science." Can you imagine that level of harmony?
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It'd be like if every film critic agreed on the best movie ever made.
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Dwayne's favorite?
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Shrek 2.
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Today, we know that plate tectonics shape the planet we know and love.
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It's why Europe is warm enough for people to live there, while Antarctica is uninhabitable.
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Unless you count the penguins.
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Regardless, Knowing about plate tectonics helps us prepare our communities for disasters like volcanic eruptions, earthquakes, and tsunamis.
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And it gives us a window into Earth's past.
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Earth's plates are still moving.
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Right now!
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And we're still learning more about them.
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Like, We don't know exactly what our planet will look like in the distant future.
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Some predict that 250 million years from now, Earth may be home to another supercontinent, similar to good ol' Pangaea.
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And we don't know how long plate tectonics will last.
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One day, when the Earth gets old enough to cool way down inside, plate tectonics will come to a stop.
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reshaping the world in a big way one last time.
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That could look like mountains eroding into plateaus, Earth's magnetic field stripping away, and continents sinking into the ocean.
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But that's potentially billions of years away.
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Plate tectonics isn't going anywhere anytime soon, and neither is our massive, magnificent planet.
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Our planet moves us.
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And not just in the tear -jerking "Wow, Earth really is something" kind of way.
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The land beneath us is constantly shifting, creating something new every day, albeit very slowly.
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Go at your own pace, girl.
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As long as the sea floor keeps spreading and gravity keeps pulling, Earth's plates will be carrying us around, shaping and reshaping the world as we know it.
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Next time?
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We'll talk about how plate tectonics builds mountains.
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See you then!
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이 비디오로 말하기 연습을 하는 이유는?
이 비디오는 판구조론에 대한 깊이 있는 설명을 제공합니다. 자연 재해나 지질학적 현상은 영어 회화에서 자주 언급되는 주제입니다. 이러한 내용을 배움으로써, 여러분은 상황에 맞는 언어를 자연스럽게 사용할 수 있는 기회를 가지게 됩니다. 특히, 영어 쉐도잉 기법을 통해 여러분의 발음과 억양을 개선할 수 있습니다. 이 비디오를 따라 하면서 말하는 연습을 하면, 실제 대화에서 적용할 수 있는 유용한 표현과 어휘를 익힐 수 있습니다.
문맥에서의 문법과 표현
영상 속에서 주인공은 몇 가지 중요한 영어 표현을 사용합니다. 다음은 주목할 만한 문법 구조입니다:
- “What makes…” - 이 표현은 원인이나 이유를 설명할 때 자주 사용됩니다. 예를 들어, “What makes the Ring of Fire so dangerous?” 같은 질문을 만들어 볼 수 있습니다.
- “is made up of…” - 어떤 것이 구성되어 있다는 사실을 설명할 때 유용한 표현입니다. “The ocean floor is made up of rocks.”와 같이 활용할 수 있습니다.
- “When two plates converge…” - 조건문을 사용하여 상황을 설명하는 방법으로, “When it rains, I stay home.” 같은 문장으로 연습할 수 있습니다.
- “is full of…” - 어떤 것이 많거나 가득 차 있음을 나타내는 표현입니다. “The class is full of students.”로 예시를 들어 볼 수 있습니다.
일반적인 발음 함정
비디오에서 사용된 몇 가지 단어와 구문은 발음이 어려울 수 있습니다. 예를 들어, “Ring of Fire”의 경우는 동음이의어인 'ring'과 'fire'의 조합으로 생길 수 있는 발음 오류가 있습니다. 또한, “subduction”과 같은 복잡한 단어는 부분적으로 강세를 두는 것이 어려울 수 있습니다. 이러한 단어들은 영어 쉐도잉 연습을 통해 더욱 자연스럽고 유창하게 발음할 수 있도록 도와줍니다. 따라서 이러한 함정을 이해하고 연습하는 것이 중요합니다.
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | is bordered · is made · is called |
| 현재완료 have/has + 과거분사 — 과거의 일이 지금도 관련이 있을 때 | has had · have shaped · have caused |
| 관계절 who / which + 절 — 사람이나 사물에 대한 추가 정보 | lithosphere, which makes · above, which has |
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.