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?
a. Mystery
b. Breath
c. Language
d. Message

Answers

Answer 1

Answer:

Mystery

Explanation:

Because I got it right on the flvs test

Answer 2

Answer:

mystery

Explanation:


Related Questions

Think of one way that life in the 1800s was different from life today. Briefly explain that difference. fasssssst

Answers

Answer:

Women were different, AT the time they were expected to stay in dutifuly, not study, be good housewives, soft-spoken and were seen as objects of beauty. Now women are bolder, have a better input in society, can be educated, have jobs, marry to their own will, wear what they want. Hopefully our situation shall get better though..there still is discrimination.

Explanation:

Answer:

In the 1800's, no one had personal computers like they do now. Computers had not even been invented yet!

Trust me ;p

Explanation:

Help me please!!!! Don’t answer if u don’t know!!!
HELPPPP

True or False: The groundlings (commoners) could buy a space on the floor of the theatre for
a penny, while the noblemen would sit in the balcony.

Answers

Answer:

{Hello! Kirito here!}

I am almost 100% sure it is

True!

Explanation:

I am so sorry if i am incorrect!

i think it is true. hope this helps!

Are these complete sentences, or is one of them a fragment?
After the movie, Gloria Pritchett and her friends went out
for ice cream. The store, however, not having print
chocolate chip


Complete Sentences or
Fragment

Answers

Answer:

The first sentence is a complete sentence, but the second one is a fragment.

Explanation:

In the first sentence, a complete thought is expressed, with a subject, verb, and context. In the second however, the sentence is incomplete, as it does not explain what happens as a result of the store not having mint chocolate chip ice cream.

After the movie, the sentence is a complete sentence and the other one about the chocolate chip is an n fragment.

What is a sentence?

The portion of a sentence that contains the phrase and the words is known as the sentence. Frequently, this has both a subject and a predicate. It must be grammatically proper for a sentence. Additionally, all necessary punctuation should be used in a sentence. Either a noun or a pronoun may be present.

After the movie, Gloria Pritchett and her friends went out for ice cream is a complete sentence.A complete notion is given in the first sentence, which includes an object, action, and situation.

The store, however, not having print chocolate chip is a sentence fragment. The second line, on the other hand, is unclear since it does not state what transpires as a result of the company's lack of chocolate mint dessert.

Learn more about sentence, Here:

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PLEASE HELP! ASAP!
How is D'Artagnan saved from being arrested by the Cardinal?

Answers

Answer:

D'Artagan saves himself by presenting a letter of protection that he took from Milady. ... Aramis says he is entering a monastery and D'Artagnan must take his place in the musketeers. d. D'Artagnan jumps out the window and escapes to England.

Explanation:

Can someone Write a subjective statement about schools cafeteria food ? (30 points) !!!

Answers

Answer: School’s cafeteria food is bland and tasteless. It’s always the same rotation of food over and over again that has no flavor.

Explanation:

Marley makes it clear that if Scrooge shows more kindness, he (Marley) will be spared additional suffering. *

True or False

Answers

Answer:

True i think so?

Explanation:

Answer:

False, because Marley wouldn't want to spread additional suffering.

How does Shakespeare present lady Macbeth as defying nature

Answers

Answer:

Lady Macbeth is one of Shakespeare's most famous and frightening female characters. When we first see her, she is already plotting Duncan's murder, and she is stronger, more ruthless, and more ambitious than her husband. She seems fully aware of this and knows that she will have to push Macbeth into committing murder.

Explanation:

Lady Macbeth is even more ambitious and ruthless than her husband. As soon as an opportunity to gain power presents itself, she has a plan in mind. She uses her influence to persuade Macbeth that they are taking the right course of action and even take part in the crime herself.

How did the actions of the towns people reflect the time in which the story takes place the aventures of Huckleberry Finn chapter 8

Answers

Answer:

antebellum

Mid-Nineteenth Century

The story takes place during the antebellum, or pre-Civil War period, of the United States. This was a time of American growth and expansion and, in some states, plantations and slavery.

Jim says that he overheard Miss Watson discussing selling him for $800 to a slave trader who would take him to New Orleans, separating him from his family. Jim left before Miss Watson had a chance to decide whether or not to sell him. Jim and Huck discuss superstitions—in which Jim is well-versed—and Jim’s failed investments, most of which have been scams. ‍♀️

i need helppppp plsss answer!!! 20 points!!

Answers

Answer:

I believe that To Kill a Mocking Bird should not be removed from the school curriculum.

Explanation:

To Kill a mocking bird is a very influential and impactful book. This book teaches important issues about racism. Because this book talks about racism it can impact many people in different ways. With our modern world being the way it is, I think that the book can make a change. This will allow students to comprehend and learn that everyone is as equally important and that skin color should not matter. This book is very beneficial for students because it can shape them into a better person.

I hope this helps!

Explanation:

I do not think To Kill a Mockingbird should be removed from school curriculum because it teaches kids about the importance of the great depression and the coexistence of good and evil.

Select a synonym for the word serious.

plain

earnest

playful

obvious​

Answers

Answer:

playful

Explanation:

serious is wen something u must be professional a bit with and playful is the opposite of serious

synonym is the opposite of something

Answer:Select a synonym for the word serious.

    earnest is the answer

Explanation:

Lynn tries to protect her sister from prejudice by all of the following ways EXCEPT

Answers

Answer:

the last one

Explanation:

Read the following sentences that contain Midwestern sayings.

You take the first left after the school, and then turn right at the first intersection that has a stop–and–go light.

What is the meaning of stop–and–go light as it is used in the sentence?
A landmark

B stop sign

C traffic light

D train crossing

Answers

i’m pretty sure it’s C, that’s what my friends call traffic lights a lot
:)
The answer is C. The term stop and go refers to how the stop light tells you weather to stop or go

3 5 7 9 48:14 Read the excerpt from Gilgamesh: A New English Version. Which statement best paraphrases these sentences from the text? Gilgamesh stopped. He was trembling. Tears flowed down his cheeks. "O Shamash," he cried "protect me on this dangerous journey Remember me, help me, hear my prayer." O Frightened, Gilgamesh pleads with the god Shamash to protect him during this dangerous Journey O Trembling and crying, Gilgamesh honors Shamash so that Shamash will grant his wish. O Gilgamesh shows great respect for the god Shamash by praying to him for protection. O Shamash is a powerful god, so Gilgamesh asks him to provide safety as he faces great danger. ​

Answers

Answer:

A. Frightened, Gilgamesh pleads with the god Shamash to protect him during his dangerous journey

Answer:

a

Explanation:

edge said so

Which of the following is NOT considered a careful listening skill?

- Maintaining eye contact with the speaker

- Refraining from interrupting the speaker

- Taking quality notes

- Making an effort to understand

PLZ HELP!!​

Answers

Answer:

Refraing from interupting the speaker

Explanation:

Answer:

Refraining from interrupting the speaker.

Explanation:

This is because when you try not to speak, you're most likely thinking about something off topic.

What type of figurative language in Rudolph the Red Nosed Reindeer song is written here "Rudolph the Red Nosed Reindeer."​

Answers

Answer:

Alliteration

Explanation:

All of the major words begin with the same letter (r).

Read the sentence.

Because she had not finished the project, Angelina asked her teacher to postpone the deadline.

Based on the context clues in this sentence, what is the meaning of the word postpone?

repeat
extend
construct
assign

Answers

Answer:

extend

Explanation:

because if postpone would be used differently it would be cancelled but mostly it is the word extend Angelina's deadline.

Based on the context clues in the sentence, the meaning of the word postpone is to extend or delay the deadline. Hence, option B is correct.

Angelina asks her teacher to postpone the deadline because she had not finished the project, implying that she wants more time to complete it. Therefore, extend is the correct interpretation of postpone in this context.

To postpone means to delay or reschedule an event, appointment, or deadline to a later time or date. It involves pushing something that was originally planned to happen at a particular time to a later point in time.

Learn more about interpretation here:

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Which option is an example of a subgenre of poetry?

tragedy
fable
epic
novel​

Answers

Answer:

It will be Epic

Explanation:

I studied these and took a test and this was the correct answer

The option that  is an example of a subgenre of poetry is :

C) Epic

"Subgenre of poetry"

The option that  is an example of a subgenre of poetry is Epic.

Poetry may at that point be subdivided into the sorts of lyric, epic, and sensational.

The verse incorporates all the shorter shapes of verse, e.g., melody, tribute, number, requiem, piece.

Dramatic verse might incorporate comedy, catastrophe, melodrama, and blends like tragicomedy.

The examples of Poem in Literature is Haiku Poem and Epic Poem.

Thus, the correct answer is C.

Learn more about "Poetry":

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how does my poem sound?
Music is my best friend

she is always there

shes with me till the end

she is there when i'm in need

she calms me down when upset

Music is like my best friend

She takes my worries away

I'll love her until the end

Music is here for me everyday

Answers

Answer:

I think it sounds good! Simple and meaningful!

I like it it’s simple and nice :)

What is a non example of propaganda

Answers

Answer:

Propaganda is some information, like a poster or newspaper article or leaflet or tv broadcast etc, which only gives one very strong point of view to try to influence people to a certain way of thinking.

So, NON propaganda is something in these media which tells only the truth and gives a balanced view, or explains that there are different opinions about something, or which just doesn't try to give any opinion at all.

So, a leaflet which is an instruction sheet for a washing machine is not propaganda.  A newspaper article about a big hurricane is not usually propaganda if it just describes the effects of the hurricane.  A poster reminding people to vote in an election but which doesn't try to tell them who to vote for is not propaganda.  A TV show about cooking is not propaganda.  

Explanation:

Many students have been getting low scores on tests and this is upsetting to parents, teachers, and students. Low test scores may indicate that teachers aren’t teaching effectively or that students aren’t learning. Either way it’s an issue with which we are concerned. I propose the following: any teacher who is giving a test should open up their classroom for study groups the night and morning before the test. Maybe by giving students extra opportunities to study, we can improve students’ test scores.

Compare Contrast


Chronological


Cause Effect


Problem/ Solution


Enumeration/ Description

Answers

Answer:

Promblem and soultion

Explanation: It has a promblem and then says how you can fix it.

What is Minnie's relationship with Miss Celia like? In one paragraph

Answers

Answer:"Miss Celia, the way she stares at me with those big eyes like I'm the best ..

Explanation:

What does narrative context mean?

Answers

Answer:

Context is the background, environment, setting, framework, or surroundings of events or occurrences. Simply, context means circumstances forming a background of an event, idea or statement, in such a way as to enable readers to understand the narrative or a literary piece.

Explanation:

Answer:

is that narrative is the systematic recitation of an event or series of events while context is the surroundings, circumstances, environment, background or settings that determine, specify, or clarify the meaning of an event or other occurrence. As a verb context is. (obsolete) to knit or bind together; to unite closely. narrative. English. Simply, context means circumstances forming a background of an event, idea or statement, in such a way as to enable readers to understand the narrative or a literary piece. It is necessary in writing to provide information, new concepts, and words to develop thoughts.

Explanation:

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Write a summary for Macbeth Act 1 Scene 2.

Answers

Answer:

In Act 1, Scene 2 of Macbeth, a wounded officer brings King Duncan news of Macbeth's bravery in battle. He talks about how soon after he defeats the Irish rebel Macdonwald, he begins fighting the massive Norwegian army. ... He also tells how the Thane of Cawdor betrayed the King by helping the Norwegian army.

29 POINTS HURRYYYYYY UPPPPPPPPP
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NAME 2 PEPLE IN ANIMAL FARM

Answers

Answer:

Benjamin and bluebell

Explanation:

please mark me as brainliest

How does an author’s choice of words help a reader determine the author’s purpose and perspective?

full sentence please

Answers

Answer:

Diction

Explanation:

dis is vital because the writer's choice of words helps to communicate clearer to d reader

1. A group of Romantics called the Transcendentalist believed that?
A. America was destined to conquer the world.
B. everything in the physical world is a reflection of the Divine Soul.
C. true art could only be created by Americans on American soil.
D. art was the best way to bring about social change.

Answers

Answer: B. Everything in the physical world is a refelction of the Divine Soul

Explanation:


Pelucita is evaluating sources to help her answer her research question, "What are the most popular magic tricks?" Would the
following source be effective in helping to answer her research question?
Magic is short for Magic: The Gathering, which is known as the first official trading card game. Invented by Richard Garfield, the
game was first released in 1993 and has become extremely popular since then. The cards are now also available online, so players
can play in a variety of ways. The game is played by two or more people, and each game is a battle between different wizards.




No, because the source does not ask any questions.

Yes, because the source includes facts.


No, because the source describes a different topic.

Yes, because the source
mentions magic.

Answers

Answer: No, because the source describes a different topic.

Explanation:

An effective source for Pelucita's research question would be one that gives details on magic tricks and the most popular ones amongst them.

This source however, is describing something else. It alludes to the a card game called Magic and not actual magic which means that it will not talk about magic tricks and which ones are the most popular but rather about a card game.

It is therefore not an effective source.

what can you say to your interviewee on his attitude towards schools and work​

Answers

Diligence in school translates to diligence in work. This is a very broad question but I’d say talk about how patterns in school are likely to carry over to other scenarios.

In what way is Benny's dialogue about jazz music (“I think that's to the melody") similar to
his dialogue about a love story ("It's like ... they're not")?
A
In both cases, Benny says that detours that occur along the way are
tolerable because there is a defined ending.
ro
B
In both cases, Benny declares that people can use their experience to avoid
becoming disoriented.
с
In both cases, Benny suggests that fictional situations are not as important
as real-life situations.
D
In both cases, Benny stresses that an observer of events should remain
neutral about them.

Answers

Answer:

A- In both cases, Benny says that detours that occur along the way are tolerable because there is a defined ending.

Explanation:

your welcome!

Dear Ty,

help plz, My dad got the pictures that we took on the trip to Alaska. I promised you that I would send you some. I'm sending them with this letter. The one of you and me on the boat is especially good. I'm still thinking about all the fun things that we did. The train ride was the best. It was fun eating breakfast on the train. I'm glad we got to see the mother bear and her cubs. I hope you have a good year at school.

Your friend,




Which detail best belongs in the letter?
A.
We have decided to adopt a new pet.
B.
My mom said I could play baseball this year.
C.
The pictures turned out really well.
D.
Alan came over to my house for a sleepover.

Answers

Answer:

c the picture turned out well

Explanation:

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Totally blanking on how medians work PLEASE HELP ME WITH THIS How is surface water naturally purified?A:freezing water destroys impuritiesB:evaporation leaves impurities behindC:sediments precipitate outD:soil filters the water Which list best identifies the organization of information in this passage? Drag each label to the correct location.Identify the type of tax described in each scenario.SituationType of ConflictHolaOne family makes $50,000 a year, andanother family makes $100,000. Bothfamilies buy the same car at the samedealership, and both families pay $1,500in sales tax.At federal income tax time, twoneighbors pay their taxes. As they aretalking one day, they realize that theyare not in the same income tax bracket,so one neighbor pays a higherpercentage of his income in taxes thanthe other does.Two people who make very differentincomes pay the same percentageof their income in taxes. we're all crusades fought exclusively in the middle east ??? NEED HELP ASAP!!! Which statement best describes how the use of analogy supports the meaning of the passage? Freedom's Festivity Smack in the middle of summer we perform pirouettes on night's stage. Pop! Sizzle! Wow! Like percussionists playing Lady Liberty's song, reminding audiences of stars, stripes, and freedom. Light is the ink we use: Which type of power is being described if you work harder on your math homework because your favorite athlete did a public service announcement about the importance of good grades? question 23. the way one deals with an uncomfortable or unbearable feeling or situation is called _____.A. denialB. anger managmentC. risk factorD. coping strategies When an organism reproduces asexually, the offspring are _____A_____ _____B_____ to the parent. Use the fact that 1.5 is the same as 3/2 to select allof tile equations below that are equivalent to T=A^1.5 Which graph represents the function f(x) = (x 5)2 + 3? Provide a radian measure of an angle that is 5/8 of a revolution counterclockwise from the x-axis. The compound cobalt(II) bromide is a strong electrolyte. Write the transformation that occurs when solid cobalt(II) bromide dissolved in water. Be sure to specify states such as (aq) or (s). 6.A circle has a diameter of 11 inches. What is the circumference of the circle using 3.14? = . Single choice. I will award brainliest here what is the ratio 5/7 to 2/7 God Loves you Have a bless day, Remember your perfect the way you are!!!! Whats the answer does anyone know answer ASAP:Explain how to use a horizontal number lineto order four fractions from least to greatest.