Prática de Shadowing: Why Is the Ocean Salty and Rivers Are Not? - Aprenda a falar inglês com vídeo

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Why is the ocean salty and rivers aren't?
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In fact, most of the salt in the sea comes from rivers.
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But how can that be?
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It all starts with ocean water heading out on a journey.
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Warm surface water evaporates.
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The water vapor then rises to condense into clouds that sometimes get carried over land where they rain down again.
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On their way down, the water droplets absorb CO2 and become slightly acidic.
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When they splash onto stones and soil, they wash out salts and minerals as ions and feed them into rivers.
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From there, the salts travel to some lake or the ocean where they can accumulate over time.
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After animals and plants feast on this mineral buffet, sodium and chloride ions remain as leftovers.
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You know them as salt.
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It's responsible for the salinity of ocean water.
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Because the ocean deposits as much salt sediment on the sea floor as rivers feed into it, the salt level stays at a stable 35 grams per liter on average.
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Rivers in turn do not accumulate salt.
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They simply deliver the minerals and the little traces of salt to the oceans and lakes.
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What goes in, comes out.

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Vocabulário e dicas de fala para esta lição

Esta aula de conversação de nível B2 usa o vídeo “Why Is the Ocean Salty and Rivers Are Not?”. As palavras que mais se repetem: salt, ocean, rivers, mineral. Este vídeo tem 16 frases e 196 palavras para praticar shadowing. A fala dura 0:57. O falante fala rápido, cerca de 207 palavras por minuto, então espere sons ligados e reduzidos. Apenas 77% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.

Vocabulário principal deste vídeo

As 15 palavras mais avançadas do vídeo, com pronúncia e significado:

PalavraPronúnciaSignificado
mineral substantivo/ˈmɪn.ə.ɹəl/mineral
accumulate verbo/əˈkjuːmjʊˌleɪt/acumular
ion substantivo/ˈaɪ.ɑn/íon, ião
acidic adjetivo/əˈsɪd.ɪk/ácido
chloride substantivo/ˈklɔɹˌaɪd/cloreto
condense verbo/kənˈdɛns/condensar
droplet substantivo/ˈdɹɑplət/gotinha, gotícula
evaporate verbo/ɪˈvæp.ə.ɹeɪt/evaporar
leftover adjetivoreservada, conservada
salinity substantivo/səˈlɪnɪti/salinidade
sediment substantivo/ˈsɛd.ɪ.mənt/sedimento
litre substantivo/ˈli.tɚ/litro
buffet substantivo/bəˈfeɪ/bufê
vapor substantivo/ˈveɪpɚ/vapor
salty adjetivo/ˈsɔlti/salgado, salobro

Phrasal verbs que você vai ouvir

PalavraPronúnciaSignificado
come out verbo/ˌkʌm ˈaʊt/sair, partir

Pronúncia para ficar de olho

  • Palavras longas — acerte a sílaba tônica: accumulate /əˈkjuːmjʊˌleɪt/, evaporate /ɪˈvæp.ə.ɹeɪt/, salinity /səˈlɪnɪti/

Sons difíceis para falantes de português:

  • Consoante final — sem acrescentar um “i” depois: accumulate /əˈkjuːmjʊˌleɪt/, acidic /əˈsɪd.ɪk/, chloride /ˈklɔɹˌaɪd/, droplet /ˈdɹɑplət/, evaporate /ɪˈvæp.ə.ɹeɪt/

Como praticar com este vídeo

  1. Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
  2. Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
  3. Grave a sua voz e compare com o original, prestando atenção a palavras como mineral, accumulate, ion.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

Técnica de shadowing: leia o guia completo passo a passo →