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Why Do We Yawn? | COLOSSAL QUESTIONS

Why Do We Yawn? | COLOSSAL QUESTIONS

Colossal Cranium

994K views 8 years ago

Warm-up Questions

From the title, what do you think the video will explain about yawning?
Do you think yawning is mainly about being tired, or could there be other reasons?
Why might yawns be “contagious,” according to your own experience?

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Why Do We Yawn? | COLOSSAL QUESTIONS

What yawning is like and when it happens (00:00 – 00:45)

Transcript will load here…

1. What two main questions does the video ask at the beginning?

Why we yawn and why yawns are sometimes contagious
Why we hiccup and why hiccups are painful
Why we sleep and why we dream

2. According to the video, when do humans start yawning?

Before they are born
Only when they become teenagers
Only after they are born

3. The video says we yawn at times when our level of alertness is ______.

always increasing
completely gone
changing

Why Do We Yawn? | COLOSSAL QUESTIONS

Older theories: sickness and being more alert (00:45 – 01:22)

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1. What did Hippocrates believe yawning did?

Removed bad air from the lungs
Cooled the brain
Strengthened the jaw muscles

2. In the 1700s, some experts believed yawning was a reflex meant to increase ______.

memory and intelligence
blood pressure, heart rate, and oxygen levels
muscle size and strength

3. Which of these does the video say does NOT increase when you yawn?

Sweating
Both heart rate and sweating
Heart rate

Why Do We Yawn? | COLOSSAL QUESTIONS

Modern idea: yawning as communication (and contagious yawns) (01:22 – 02:09)

Transcript will load here…

1. According to some experts, yawning might be another way for us to ______.

exercise
communicate
eat more oxygen

2. Why can yawns be contagious, according to the video?

Because seeing someone yawn can cause us to feel what that person is feeling
Because yawning always happens at the same time every day
Because yawning makes the air warmer

3. How does the video describe this shared yawning?

Like a medical test
Like a conversation between our bodies
Like a sport competition

Why Do We Yawn? | COLOSSAL QUESTIONS

Transcript will load here…

1. Which statement best matches the video’s overall message about yawning?

Yawning has several theories, and scientists have ruled out some older ideas.
Yawning only happens when people are bored.
Experts know exactly why yawning happens and agree on one cause.

2. Which idea does the video say modern science does NOT support?

Yawning increases heart rate and brain electrical activity
Yawning can happen when alertness changes
Yawning may be connected to communication

3. What is one reason the video gives for contagious yawning?

It is caused by loud sounds
It is a way to copy someone’s mood changes nonverbally
It happens because yawning always brings more oxygen into the body

Discussion Questions

Discuss the ideas from this video

Why Do We Yawn? | COLOSSAL QUESTIONS

When do you usually yawn: when you’re tired, waking up, or during other moments? Give examples.
Do you think yawning is more about the body (biology) or communication (social behavior)? Why?
Have you noticed contagious yawning in your life? What situations make it more likely?
If you could test one theory about yawning, what would you study and how would you test it?

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