Why We Yawn
Lee el texto en inglés, parte por parte, y responde cada pregunta. Toca una palabra con línea punteada para ver su traducción. Abajo está el vocabulario completo en español.
Everybody yawns. Babies yawn before they are born, and so do dogs, cats and even fish. For a long time, people thought we yawn because we need more air. Scientists tested this idea. They gave people extra oxygen, and the people yawned just as much.
1. What happened when people got extra oxygen?
- AThey stopped yawning
- BThey yawned more
- CThey yawned just as much
Ver la respuesta
C. They yawned just as much
With extra oxygen, people yawned just as much as before.
La prueba en el texto: They gave people extra oxygen, and the people yawned just as much
Today, many scientists think a yawn cools the brain. When you open your mouth wide, you take in a big breath of cooler air. The blood going to your head gets cooler. This may help the brain work better when it is tired or warm.
2. What do many scientists now think a yawn does?
- AIt cools the brain
- BIt gives the body more oxygen
- CIt helps us fall asleep
Ver la respuesta
A. It cools the brain
Many scientists now think a yawn cools the brain.
La prueba en el texto: a yawn cools the brain
This could explain why we yawn more in some places than others. In one study, people yawned more often in spring than in the heat of summer. When the air outside is as hot as your body, a deep breath cannot cool anything.
3. Why did people yawn less in the heat of summer?
- APeople sleep more in summer
- BA hot breath cannot cool anything
- CSummer air has more oxygen
Ver la respuesta
B. A hot breath cannot cool anything
When the air is as hot as your body, a breath cannot cool anything.
La prueba en el texto: When the air outside is as hot as your body, a deep breath cannot cool anything
Yawns are also catching. If you see someone yawn, you will probably yawn too. You may even yawn now, just reading about it. We catch yawns most often from people we know well, like family and close friends.
4. True or false? We catch yawns most often from strangers.
- ATrue (Verdadero)
- BFalse (Falso)
Ver la respuesta
B. False (Falso)
We catch yawns most often from family and close friends.
La prueba en el texto: from people we know well, like family and close friends
Vocabulario en español
| Inglés | Español | Significado en inglés |
|---|---|---|
| oxygen | oxígeno | the gas in the air that we need to breathe |
| catching | contagiosos | easy to pass from one person to another, like a cold |
| breath | bocanada | the air you take into your body |
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Escribe una frase en inglés: In one sentence: why did scientists stop believing we yawn to get more air?
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