Shadowing Practice: NASA | Tour of the Moon - Learn English Speaking with Video
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To nearly everyone, the Moon appears to be a sterile, gray, unchanging world.
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But while the Moon has remained largely unchanged during human history, our own understanding of it has evolved dramatically.
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Thanks to new observations, we now have not only unprecedented views of its surface, but a whole new tour of the Moon that shows how both it
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and other rocky planets in our solar system have been shaped over billions of years.
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We'll start with one of the largest impacts, Oriental Basin, a feature that's as wide as the distance from New York City to Cincinnati.
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Using new elevation measurements, we can clearly see the effects of what is likely the last giant impact event in lunar history,
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with its outer mountain rings rising many kilometers above the lowest points inside the crater.
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The interiors of some craters in the Moon's polar regions, like Shackleton, haven't seen sunlight in over two billion years.
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However, new measurements have created our best yet maps of these types of craters, allowing us to see deep into the shadows of this surprisingly
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young-looking impact crater in the south that's more than twice as deep as the Grand Canyon.
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Some impacts are invisible for other reasons.
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Although the ancient South Pole-Aitken Basin is difficult to see from orbit because it is so large,
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new LRO topography maps reveal the largest impact basin in the Earth-Moon system, measuring several kilometers in depth and around 2,500 kilometers in diameter.
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Only the Hellas Basin on Mars rivals it in size.
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One of the youngest large-scale impacts on the Moon is the Tycho Crater.
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This fresh crater may have formed only 108 million years ago, when dinosaurs roamed the Earth.
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We now also have an extreme close-up view of the crater's central peak, revealing a a mountain with sharp edges,
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building-sized rocks, and a central boulder about the size of a baseball stadium.
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The Aristarchus Plateau is another recent lunar formation that has long interested scientists and astronomers.
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The crater itself, formed in the same era as the Tycho Crater, and what appear to be snaking river valleys, were actually carved by ancient lava flows.
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Next, we arrive at Mare Serenitatis on the near side of the Moon.
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In December of 1972, the crew of Apollo 17 landed in the Taurus-Littro Valley,
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marking the last time humans have visited the surface of the Moon.
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With images from LRO's narrow-angle camera, we can clearly see the evidence of that visit.
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In this image, you can easily see the base of the lunar lander, along with the lunar rover, parked far from the blastoff zone.
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You can also clearly see the astronaut trails and the wheel tracks left on the lunar surface.
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We now head to the far side of the Moon, which cannot be seen from Earth.
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Our first stop is the Compton-Belcovich region, which shows evidence for young volcanic activity in the Far Side Highlands.
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This feature is unique not only because it is isolated from other volcanoes in the area, but also because it is located nowhere near the Maria,
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where volcanoes are usually found.
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Also, on the Far Side, we find the Jackson Crater, which like the Tycho Crater on the near side has an extensive and complex ray system.
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In fact, this crater is often considered to be like a twin to Tycho.
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Finally, the Tsiolkovsky Crater stands out as an excellent example of a far side crater filled with a sea of ancient lava, known as a mare.
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It is particularly interesting to scientists and other observers
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because of its isolation from other similar craters as well as its beautiful central peak.
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As we continue to study the Moon, our understanding of it improves, giving us new insights not only into how it has evolved over time,
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but also how other rocky planets in our solar system have come to look the way they do.
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With new missions, new instruments and new technologies, we will continue to improve our knowledge of the Moon and better understand the history of our solar system.
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Thank you.
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Woordenschat en spreektips bij deze les
Deze woorden komen het vaakst terug: crater, Moon, impact, lunar, Tycho. Deze video bevat 39 zinnen en 686 woorden om na te spreken. Het gesproken deel duurt 4:41. De spreker praat in een gelijkmatig tempo van ongeveer 146 woorden per minuut, prettig om te shadowen. Slechts 79% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden, dus de woordenschat is pittig.
Belangrijke woorden in deze video
De 15 moeilijkste woorden uit de video, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| crater zelfstandig naamwoord | /ˈkɹeɪ.tɚ/ | krater |
| lunar bijvoeglijk naamwoord | /ˈlunɚ/ | lunair |
| basin zelfstandig naamwoord | /ˈbeɪsɪn/ | bassin |
| lava zelfstandig naamwoord | /ˈlɑvə/ | lava |
| volcano zelfstandig naamwoord | /vɑlˈkeɪ.noʊ/ | vulkaan, vuurberg |
| evolve werkwoord | /ɪˈvɑlv/ | ontwikkelen |
| measurement zelfstandig naamwoord | /ˈmɛʒ.ə.mənt/ | meting |
| astronomer zelfstandig naamwoord | /əˈstɹɒn.ə.mə/ | astronoom, sterrenkundige |
| sterile bijvoeglijk naamwoord | /ˈstɛɹəl/ | onvruchtbaar, steriel |
| topography zelfstandig naamwoord | /təˈpɑɡɹəfi/ | topografie |
| isolate werkwoord | /ˈaɪ.sə.leɪt/ | isoleren |
| astronaut zelfstandig naamwoord | /ˈæstɹəˌnɔt/ | ruimtevaarder, astronaut |
| volcanic bijvoeglijk naamwoord | /vɔlˈkænɪk/ | vulkanisch |
| boulder zelfstandig naamwoord | /ˈboʊl.dɚ/ | rotsblok, kei |
| unchanged bijvoeglijk naamwoord | /ʌnˈt͡ʃeɪnd͡ʒd/ | onveranderd |
Grammatica in deze video
De structuren die de spreker het meest gebruikt, met de exacte woorden uit de video:
| Structuur | In de video |
|---|---|
| Present perfect have/has + voltooid deelwoord — iets uit het verleden dat nu nog telt | has remained · have not only unprecedented · have been shaped |
| Lijdende vorm be + voltooid deelwoord — het gaat om wat er gebeurt, niet om wie het doet | have been shaped · were actually carved · cannot be seen |
Uitspraak om op te letten
- De klanken “sh” en “zh”: measurement /ˈmɛʒ.ə.mənt/, elevation /ˌɛlɪˈveɪʃn̩/, isolation /ˌaɪsəˈleɪʃən/
- Lange woorden — let op de klemtoon: astronomer /əˈstɹɒn.ə.mə/, topography /təˈpɑɡɹəfi/, unprecedented /ʌnˈpɹɛsɪdɛntɪd/, isolation /ˌaɪsəˈleɪʃən/, diameter /daɪˈæmɪdɚ/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: evolve /ɪˈvɑlv/, unchanged /ʌnˈt͡ʃeɪnd͡ʒd/, unprecedented /ʌnˈpɹɛsɪdɛntɪd/
- /æ/ — opener dan de Nederlandse “e”: lander [ˈlændɚ], astronaut /ˈæstɹəˌnɔt/, volcanic /vɔlˈkænɪk/, diameter /daɪˈæmɪdɚ/
- /g/ — een harde plofklank, geen Nederlandse “g”: topography /təˈpɑɡɹəfi/, youngest /ˈjʌŋ.ɡɪst/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Spreek zin voor zin na op normale snelheid en herhaal elke zin tot je ritme gelijk is aan dat van de spreker.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als crater, lunar, basin.
Wat is de Shadowing-techniek?
Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.