Science Mysteries: Why Do People Yawn?

Science has given humans many amazing devices and useful bits of knowledge. We know so much about our bodies and how to stay healthy, for example. We also know how to make machines and devices that make life easy for us. Scientists dedicate their lives to knowledge, but even with a lifetime commitment, sometimes scientists fail to find all the answers. One mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves.

Recent studies suggest that we yawn when we get tired as a way to encourage our brains. The theory is that yawning helps cool the brain, allowing it to work more efficiently. According to WebMD's article about these studies, when you yawn, your jaw muscles get stretched, increasing blood flow to your neck, face, and head. Also a deep breath during the yawn forces spinal fluid and blood down from the brain. The cool air then cools down these fluids.

Other scientists believe, however, that yawning is a form of communication. This theory attempts to explain why yawning seems to spread from person to person. This kind of behavior is called "contagious yawning" and carries with it a possible social message. Scientists are not yet sure what exactly the message is, but they believe people who have more social empathy are more likely to start yawning when they see someone else yawning.

Scientists will continue to investigate the mystery of the yawn. Is it a leftover behavior from before humans had language? Was it a "Hey, I'm sleepy. Let's go to sleep" message? Or is it really just a way to keep our brains cool? While this behavior still is largely a mystery, one thing is certain: you are probably fighting the urge to yawn right about now.

Which word from the text best describes scientists' understanding of the yawn? (5 points)

a
Mystery
b
Breath
c
Language
d
Message

Answers

Answer 1

Answer:

mystery

Explanation:

Throughout the passage, the author repeatedly refers to yawning as a mystery. For example, "One mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves." and "Scientists will continue to investigate the mystery of the yawn." and also, "while this behavior still is largely a mystery, one thing is certain:"


Related Questions

Fren bought groceries that cost $14.40 .She paid the store clerk, Ping,with a $20 bill. Ping makes change by saying. 2 pennies make the total $14.40 . 6 dimes makes it $15.00 ,and 6 dollars makes it $20 .

Answers

Answer:

D. yes, ping should give five one dollar bills, not six

Explanation:

Given data is

Fren bought groceries.

The groceries cost = $14.40

She paid to ping (clerk) = $20

hence, the money should give by ping to fern is = $20 - $14.40 = $5.6

two pennies make the total of $14.40 which is true.

six dimes makes $15 this is also true.

six dollars makes $20 this is false.

Since $15 + $6 = $21 which is not equal to $20.

Read the information in the brainstorming table.

Beginning: First, I signed up to audition for a part in the school play. Middle: Then I recited my lines and sang a short solo for the chorus teacher. End: Blank.

Which piece of information best completes the table?

Every year, the students in our school put on a spring performance.
Finally, the chorus teacher announced there would be a school play.
Then I chose a song and prepared for my audition.
Finally, I was selected for a leading role in the play.

Answers

Answer: is d

Explanation:

I am confused on this question pls tell me someone :)

Answers

Answer:

Just answer the question and try to remember what you've learned

Explanation:

Three major events happen in one day: a Republican politician makes a statement about immigration, a Democratic politician makes a statement about immigration, and a protest group makes a statement about immigration. The producers of the KRSTZ radio program choose to cover only one of these stories. What kind of bias do they show?

inevitable bias
bias by omission and bias by arrangement
bias by omission
unintentional bias
It depends completely on what the events were, so there is not enough information to tell.

Answers

Answer:

inevitable bias

Explanation:

no matter what they did its going to be viewed as some kind of bias

How does Machiavelli work to achieve his secondary purpose—to inform his readers?

Answers

Answer:

He explains that principalities don't know how to rule themselves. He describes the steps people take when they join rebellions. He describes the emotions of people in a conquered republic.

Explanation:

hope this helps, i just looked it up.

Read the excerpt from Flannery O'Connor's "The Life You Save May Be Your Own." The ugly words settled in Mr. Shiftlet's head like a group of buzzards in the top of a tree. The simile in this excerpt compares Mr. Shiftlet to a group of buzzards. the ugly words to the top of the tree. a group of buzzards to the top of a tree. the ugly words to a group of buzzards.

Answers

I JUST DID IT, D

Explanation:

EDGE

After analyzing the simile in the excerpt, we can say it compares the following:

D. The ugly words to a group of buzzards.

What is a simile?

A simile is a figure of speech in which a comparison between two different things is made. Similes always rely on words such as "like" and "as" to make the comparison.

In the excerpt, the simile compares two things to other two different things:

Ugly words are compared to a group of buzzardsMr. Shiflet's head is compared to the top of a tree

Since letter D is the only option that presents one of those two possibilities, it is the correct answer.

Learn more about similes here:

https://brainly.com/question/14234454

Blazing in gold and quenching in purple,
Leaping like leopards to the sky,
Then at the feet of the old horizon
Laying her spotted face, to die;
Stooping as low as the kitchen window,
Touching the roof and tinting the barn,
Kissing her bonnet to the meadow,-
And the juggler of day is gone!
What is personified in this poem?

Answers

Answer:

The Sun is being personified in the poem.

Which two parts highlight the psychological consequences of war?

Answers

Answer:

Quit

Explanation:

Nin

i’m confused what are u supposed to be highlighting

Which fact from the Tinker v. Des Moines court decision best supports the
reasoning that the conduct of the student protesters was protected by the
Fourteenth Amendment, which prohibits deprivation of life, liberty, or
property?

Answers

Which fact from the Tinker v. Des Moines court decision best supports the reasoning that the conduct of the student protesters was protected by the Fourteenth Amendment, which prohibits deprivation of life, liberty, or

property?

O

A. The record shows that students in some of the schools wore

buttons relating to national political campaigns, and some even

wore the Iron Cross, traditionally a symbol of Nazism.

O

B. On the other hand, the Court has repeatedly emphasized the need

for affirming the comprehensive authority of the States and of

school officials, consistent with fundamental constitutional

safeguards, to prescribe and control conduct in the schools.

C. The action of the school authorities appears to have been based

on an urgent wish to avoid the controversy which might result

from the expression, even by the silent symbol of armbands, of

opposition to this nation's part in the conflagration in Vietnam.

D. That they are educating the young for citizenship is reason for scrupulous protection of Constitutional freedoms of the individual if we are not to strangle the free mind at its source and teach youth to discount important principles of our government as mere

platitudes.

Answer:

D. That they are educating the young for citizenship is reason for scrupulous protection of Constitutional freedoms of the individual. if we are not to strangle the free mind at its source and teach youth to discount important principles of our government as mere platitudes

Explanation:

The Tinker vs Des Moines Independent Community School District case which was decided by the Supreme Court ruled that the students' use of armbands represented free speech to and was not bound by the actions of the people that participated in it.

It also ruled that the school could not alienate their constitutional rights as the actions of the students in no way substantially interfere with the operation of the school.

HEY CAN ANYONE PLS ANSWER DIS!!!

Answers

Answer:

It was like old times again. Just me and my bestfriend who I hadn't seen in 5 years. Talking about how much are lives have changed over the years. We start to realize that we don't really have that much in common anymore, we both have new jobs, live in new places, new friends. Its just not the same as when we finished college. Eventually we both get tired of talking about our lives so we finish up and go home, not knowing that would be the last day we ever talked again.

Answer:

it all started when i picked up the wrong suitcase. I had no idea then I had the wrong suitcase. It looked exactly like mine. as I picked up the suitcase I walked to the car line and waited for my parents. as I was standing at the car line i started to smell something so disgusting I was going to jump right back on that plane i came off of. I started to investigate the smell in the air. I walked around and sniffed the security guard as he looked at me funny. was it him that had that  rancid smell? nope! it felt like the smell was just following me around. it was a little breezy so I thought it would be the trash can by the entrance of the airport. I secretly smelled the trash can. it was for sure stinky but it was definitely not it. I saw my parents finally pull up. I put my suitcase in the car and hurried in the car to get away from that smell! as I was sitting in the car I smelled the stinky, rancid, horribly smell again! I thought id never get away from this smell. As we pulled over to find out what the smell was me and my parents went to my suitcase and took a big sniff. OOH BOY! did that suitcase smell bad, and it was for sure the stinky smell I was smelling. I decided to open the suitcase and as I was opening it I was so scared what the smell could be that was in here. I finally opened the suitcase and i was so disgusted, and confused to find out this wasnt my suitcase. this was someone elses suitcase! in this suitcase had dirty underwear, and dirty socks! it was so grows! I wanted to barf. I went to the lost and found and quickly dropped it off and ran back to the car and left.

Explanation:

describe the effect of blank verse in the poem how would the poem be different if frost had used a rhyming form?

Answers

Answer:

^^^^^^^^The use of blank verse makes the poem sound like everyday speech. Blank verse’s regular meter gives the poem a sense of structure and stability. If the poem had a rhyme scheme, it would not sound like people were talking normally. If the poem had a rhyme scheme, the rhyme might be distracting to the reader. Rhyme schemes can sound artificial.

Explanation:

Right on e d g e n u i t y

Answer:

Fitst person is right

Explanation:

got it right on edge

what does "the peom is structured around an implied contrast" mean

Answers

Answer:

that would just mean the content of whatever poem you are studying is either paradoxical or displays 2 different ideas that prove or emphasise the message.

He sold many oranges (Passive voice )​

Answers

Many oranges were sold by him

Which are traits of a free verse poem? Check all that apply.
O a clear pattern of rhyming words
| lines that vary greatly in length
no set number of lines per stanza
an established meter and rhythm
a pattern for stressing syllables

Answers

Answer:

lines that vary greatly in lengthno set number of lines per stanza

Explanation:

Free verse doesn't rhyme or have a regular meter and tends to follow the rhythm of natural speech with no particular pattern of stressing syllables.

Answer:

B. lines that vary greatly in length. C. no set number of lines per stanza.

Explanation:

took the quiz on edge

3. Do you think that sports officials must be fit and healthy in officiating
games? Why?​

Answers

Answer:

yes

Explanation:

coz sports are going to help our body being healthy by the toxic get out from our body when we sweating

yes, i think sport officials must be healthy to set a good example

The sun....(shine) by day.
present simple​

Answers

Answer:

shining

Explanation:

**WILL GIVE BRAINLIEST PLEASE HELP**

- flakes of cold snow drifting slowly
- In sequence to make the ground
- their permanent residence

**what poetic device is used by saying the ground is the snow’s ‘permanent residence’

Answers

metaphor?

explanation :

i think its metaphor because ur not really personifying it but ur saying its something that it isnt so i think it is metaphor

Metaphors. I hope i helped :) have a good day :)

Write down Questions about why you in particular do something that u do-

Answers

We want what we do to matter

how does Antonio afterwards explains his melancholy?

Answers

Answer:

Antonio afterwards says that he regards this world as the stage of a theatre on which everyone has to play some part, his own part on this stage being a sad one.

Explanation:

What is the indirect object in the sentence?


I sent her a postcard about my trip.

Answers

The indirect object is “her.”
Who is being sent the postcard? Her.
(The indirect object is to whom or for whom the action of a verb is being performed.)

How does the cousin believe the country was affected by the decision to have an open casket funeral?

Answers

Answer:

sorry I don't know the answer

n a feeding frenzy, the pigeons descended upon the breadcrumbs that the kindly old man on the park bench continued to toss.

Which is a correct analysis of the sentence?

Answers

Answer:

the pigieons are being nice

Explanation:

c

1. All his information ..... wrong. (was, are, were)​

Answers

Answer:

well makes more sense with "was" tbh.

All his information "was" wrong.

Explanation:

Pls Help
Describe the role that poetry plays in American society today. What purpose does poetry serve, and who benefits from it?

(Remember that poetry appears in many places besides textbooks or poetry collections, including song lyrics, advertising, and spoken-word performances.)​

Answers

poetry is surprisingly popular in our day and age, many things pass off that you wouldn’t expect. rap is quite inspired by poetry and slam poetry! poetry is something we can all enjoy and helps you really stop and take in the beauty of something, it’s a breather and reminder of what’s around us.

Answer:

pepe pecas pica papas

Explanation:

'Her angry words were bullets to him'. The comparison of angry words to bullets here is a ____________________. *

Answers

Answer:

metaphor

Explanation:

Metaphors compare two unlike things without using "like" or "as," unlike similes. Angry words and bullets are being compared without "like" or "as," making it a metaphor.

11.
(adverb) My sister answered the question intelligently.
What is the adverb

Answers

Answer:

intelligently is the adverb

Tell us a time when you helped someone. Describe how your support impacted the other person and how it made it made you feel.

Answers

hi, I hope you’re having a good day :)

One time I personally helped someone was when my mom was really stressed. She went to the store and while she was gone I cleaned the house for her and made her favorite dessert. That way she could relax when she got back home for a bit. This made her feel appreciated and loved

Hope that helps :)

Which country is the island of Socotra part of? from text

Answers

Answer:

Yemen

Explanation:

Socotra sits at the entrance to the Gulf of Aden, only 60 miles from the horn of Africa. Politically it is governed by Yemen, some 230 miles to the north. Geographical isolation has sculpted Socotra in its unique form.

Read this excerpt from "The Savoy."

Answers

Answer:

The answer is B.

Explanation:

The excerpt shows that the narrator is very embarrassed.

Brainliest plz!

In which underlined adjective clause is the relative pronoun used as the object of a preposition?

a The part of Alaska that is within the Arctic Circle is cold most of the year.
b The explorer whom I met last year has never been to the North Pole.
c The climate is one in which little foliage can grow.
d I saw a dog whose sled left without him.

Answers

Answer:

D would be answer I guess

Other Questions
31) A box is pushed, up a ramp, at constant velocity with a force of 14 N.What is the magnitude of the friction force working on the box? * 24 karat gold is 100% gold. How pure is 8 karat gold? HELP ASAP- IF YOU ARE CORRECT I WILL MARK BRAINLY Select the rule for each piece. Rule for piece 1: Rule for piece 2: PLS HELP For the upcoming holiday season, Dorothy wants to mold 20 bars of chocolate into tiny pyramids. Each bar of chocolate contains 6 cubic inches of chocolate. Dorothyplans to make chocolate pyramids with a square base of 1 square inch and a height of 2 inches. What is the largest number of pyramids she can make from the 20bars of chocolate?A.180.240OC450OD520E.580 Find the work done by the gas for the given volume and pressure. Assume that the pressure is inversely proportional to the volume. (See Example 6.) A quantity of gas with an initial volume of 2 cubic feet and a pressure of 1000 pounds per square foot expands to a volume of 3 cubic feet. (Round your answer to two decimal places.) Which major event occurred during the Paleozoic era?A. All animals lived on land.B. People lived on Earth.C. Pangaea, the huge supercontinent, formed.D. Flowers first existed on Earth. A sample of human tissue has just been delivered to your evidence room for a crime scene What type of tissue is this?Please help will mark BRAINLIEST and make sure to explain!! 3. Luis tiene un negocio en el Mercado "Los Jazmines", se dedica a venta de abarrotes, el ve su negocio como una fuente de ingreso familiar y realizacin personal. Su establecimiento cuenta con 220 tarros de leche y vende cada tarro de leche a s / .2, 60 . Durante la maana Luis vende los 2/5 del total y por la tarde, d el resto. Cuntos tarros no se vendieron y cuanto de dinero se obtuvo en la venta? Cul fue el orden arquitectnico ms utilizado durante el periodo helenstico? Cules son las caractersticas que lo identifican? Drag each value to the correct location on the equation. Each value can be used more than once, but not all values will be used.A yacht is traveling 35 west of south at 15 miles/hour in still water. Find the component form of vector r, which represents the yacht's motion. Add the following complex numbers:(4-2i) + (12 + 7i)O A. -8 + 9iO B. 16 + 9iO C. 16 + 5iO D. -8 + 5i What is the value of x? find the measurement of angle RST Given the numbers 24 and 18 as legs of a right triangle, what is the length of the hypotenuse? Round your answer to the nearest tenth (1 decimal place) Hi there. May you please help if you can!A(-4, 1), B(1, 5), C(4, -3), and D(-2, -3) are the vertices of a quadrilateral. Determine the coordinates of the image vertices after each transformation of ABCD. a) a reflection in the x-axis b) a reflection in the y-axis c) a rotation of 180 cw about the origin d) a rotation of 270 cw about the originShow your work What did gladiators do when they wanted to admit defeat? PLEASE HELP !!!! WILL MARK BRAINLIEST What is not a branch in the Roman Republic?a) judges b) consuls c) assembly d) tribunes Fill in the blanks with collective nouns 1) A _______ of grapes 2) A ________ of lions 3) A _________ of rice