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

couldyou help meh plz

Answers

Answer:

Your answer should Be the First one A.

Explanation:

The answer should be the first one bc it’s taking about the claw of the lobster

When did life change for Skara Brae?

Answers

Answer:

Skara Brae dates back to Neolithic times, over 5,000 years ago. Radiocarbon dating suggests that people were living in Skara Brae for around 650 years between 3180 B.C.E and 2,500 B.C.E, making it older than Stonehenge and the Great Pyramids of Giza.

Answer:

such a tightly knit and communal village life was unusual in these early farming communities, individual farmsteads being preferred, but Skara Brae seems to have been a very close community with little room for non-conformists. Every house has the same layout for roughly a family-sized living space.

On number 1 what are things that represent a hard worker?

Answers

Answer:

you can say any type of sport ball. Athletes are hard workers

Explanation:

Answer:

being on time, knowing time management, responsibility, maturity, goes the extra mile, puts in the effort, can work with a team, motivation, flexibility etc...

1. Only some prepositions have objects.
True
False
2.A preposition creates a relationship between its object and another word in the sentence.
True
False

Answers

Answer:

a :)

Explanation:

What does Stevenson think about the justice system

Answers

Answer:

What is justice Bryan Stevenson?

Based in Montgomery, Alabama, Stevenson has challenged bias against the poor and minorities in the criminal justice system, especially children. He has helped achieve United States Supreme Court decisions that prohibit sentencing children under 18 to death or to life imprisonment without parole.

Explanation:

What is the central idea of Stevenson's speech?

He summarized the content of his novel that emphasizes the importance of equality in the justice system, especially in regards to racial bias, unfair sentencing and lack of humanity in trials. He asserts one of the primary ideas: “The opposite of poverty is not wealth… the opposite of poverty is justice.”

What is wrong with the American justice system?

With racial profiling, harsh drug laws and over criminalization, mass incarceration rates, and institutionalized discrimination all to blame for these shocking numbers, the problem also relies on socio-economic status. The American system doesn't favor lower class people, which in turn affects many people of color.What prominent person gave Stevenson's US Supreme Court case public support and why is it significant?

I think he chose these two subsets because he wants to show the relationship between the two and how each of them are treated. is it significant? Senator Simpson is the prominent person that gave public support about Stevenson's case. This is significant because he is the Republican whip.

What role does a claim play in the development of an argumentative text?

The claim is the main viewpoint of the author.
An author uses a claim to support his or her view.
The claim is used by the author as evidence to convince the reader.
A claim explains the author’s position to the reader.

Answers

Answer:

A. The claim is the main viewpoint of the author.

Explanation:

A claim is something that you want to use to persuade an audience either for or against a topic.

The claim is the main viewpoint of the author. This is the role of a claim in the development of an argumentative text. Therefore, the correct option is option A.

What is claim?

Every argumentative essay has a thesis that summarises the primary points being made to support the thesis. Demand is a different word again for claim that you can use to comprehend its meaning. What we referred to as an author's claim in your essay is this thesis statement. This term provides some insight into what constitutes a written claim.

It is a great place to start for any thesis because it encourages the reader to evaluate your work critically. Argumentative thesis assertions typically raise questions. It piques the curiosity of your readers and motivates them to read the essay. The claim is the main viewpoint of the author. This is the role of a claim in the development of an argumentative text.

Therefore, the correct option is option A.

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What is your detailed interpretation of the first amendment? ​

Answers

Answer: The first amendment focuses on the protection of religion, freedom of speech, and the press. It was made as a benefit for the citizens, to protect their rights.

Explanation:

Answer:

The First Amendment guarantees freedoms concerning religion, expression, assembly, and the right to petition. It forbids Congress from both promoting one religion over others and also restricting an individual's religious practices.

Explanation:

BRAINLIEST PLZZZZ

anyone please help will give brainliest ​

Answers

Answer:

cards don't leak - no (Unless, you mean the cards being sold before the release date.)checking accounts don't leak - no (Unless, you mean the checking accounts information leaked out.)five-year-old CDs don't leak - no90 days old  CDs don't leak - no your car can leak - yes (The car oil can leak out of your car.)

        (But, if you're not actually talking about liquid coming out of the Cds, then yes Cds can leak before their release date.)

Definitions:

(of a container or covering) accidentally lose or admit contents, especially liquid or gas, through a hole or crack.intentionally disclose (something private or secret).a hole in a container or covering through which contents, especially liquid or gas, may accidentally pass.

BRAINLIST PLS!

Read the following passage from a personal narrative:
Dad must hate it when his clients ask about the family.
"'And what about Rob Junior? Following in Dad's
footsteps?" Sometimes I think it might almost be worth it
to go to law school - not to pursue a career in law but just
to escape Dad's judgmental stares and disappointed sighs.
Which is the most accurate analysis of the two topics in this story?
O A. The speaker admires his father but finds hope for the future by
following his own calling.
OB. The pressure the speaker feels to further his education creates
tension in his home.
O C. The family supports one another in hard times, but the speaker
feels smothered.
OD. The speaker's sense of responsibility prevents him from pursuing
his dream.

Answers

Answer: B, The pressure the speaker feels to further his education creates tension in his home.

Explanation:

The speaker says he is considering to go to law school, not to further his education, but just to stop his dad from criticizing him. This shows that he does not hope to follow his own calling (a) and it never referred to the family supporting each other (c) and he is not doing it to be responsible, just to avoid his dad's criticism.

The most accurate analysis of the two topics in this story is that the pressure the speaker feels to further his education creates tension in his home, which is in option B. The passage suggests that the speaker feels pressure from his father to follow in his footsteps and become a lawyer.

What is a personal narrative?

The passage from the personal narrative describes the tension and pressure that the speaker feels in relation to his father's expectations for his future career path. The speaker indicates that his father's clients often ask about him and whether he plans to follow in his father's footsteps as a lawyer. The speaker also implies that his father expects him to do so, as evidenced by his judgmental stares and disappointed sighs when the speaker expresses disinterest in law.

Hence, the most accurate analysis of the two topics in this story is that the pressure the speaker feels to further his education creates tension in his home, which is option B.

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PLEASE HELP! BRAINLIEST! POINTS!
Which verb or verb phrase signals an inappropriate shift in mood?
I think Daniel SHOULD BECOME a plumber. He WOULD BE ABLE TO OWN his own business. He might even hire others to work for him someday. As a plumber, he could make a lot of money. He COULD HELP OUT his friends and family with plumbing problems. WILL YOU GIVE us a discount on plumbing work, Daniel?

A. would be able to own
B. could help out
C. should become
D. Will you give

Answers

Answer:

D. Will you give

Explanation:

In the other parts, they are talking about why he should be a plumber.  But in D, they are asking if he will give a discount.

Have a good day :)

Answer:

I'm going with D

Explanation:

Don't hate if It's wrong

__________contain(s) an
objective description of the murder victim.

passage 1: Trifles

passage 2: “Indicated Her for murder

both passages

Answers

Answer:

the answer is the second one in the drop down menu in egde

Explanation:

its the second one saying passage 2 Indicted her for murder

Which contains a phrase with wordy material that should be deleted or rephrased?
A)Seymore was convinced that attending the fall conference would be a big
waste of his time
B)It was an added bonus to learn that after the conference we would each
receive two tickets to a Broadway musical
C)The keynote speaker for the conference has been a gifted performer with
the Manhattan Theatre Club for seven years.
D) Mackenzie enjoyed meeting people and learning new things, so shejumped at the chance to get out of the office for a week.

Answers

Answer:

D

Explanation:

Answer:

B

Explanation:

Question # 1. The following question has two parts. First, answer part A. Then, answer part B.

Question # 1, Part A

What is most likely the author's intent by mentioning the “Rodeo Drive shopping spree” in the following paragraph?

When my parents said the three of us were moving out to California, to a place just north of Los Angeles, my mind immediately went to thoughts of Disneyland and Hollywood, glitz and glamour. I imagined a Rodeo Drive shopping spree to pick out a bikini for the endless days I would be spending on the beach. However, I’d forgotten about my parents’ penchant for the unconventional; they’re definitely “the road less traveled” kind of people. Mom had a gopher snake for a pet when she was younger, and Dad was never happier than when he was climbing near-vertical cliffs that only mountain goats could love. These are not city folk.

Question 1 options:

To show that the narrator comes from a family that is used to spending money.


To reveal the narrator as someone who is shallow and cares only for nice things.


To contrast the narrator's grand dreams with the sparse life her parents have in mind.


To emphasize the narrator's nervousness about moving to a place so far removed from civilization.


Question # 2, Part B

Which sentence from the text best supports your answer in part A?

Question 2 options:

“On the stone staircase that led to the front door, black lizards interrupted their push-ups to twist their heads and eye us as we passed.”


“Our new home consisted of one bedroom, one bathroom, and one big room for everything else.”


“Dad told me the real estate agent had mentioned that coyotes, bobcats, mountain lions, rattlesnakes, and even bears roamed these hills.”


“In the city, or even in the suburbs where I had lived before, you could see only the brightest stars in the sky.”

Answers

Answer:

#1. To contrast the narrator's grand dreams with the sparse life her parents have in mind.

#2.“Our new home consisted of one bedroom, one bathroom, and one big room for everything else.”

Explanation:

i'm doing the same test ;p

Which of the following sentences is grammatically correct? (5 points)

I was late to dinner there was a traffic jam.
I was late to dinner, there was a traffic jam.
I was late to dinner; there was a traffic jam.
I was late to dinner for the traffic jam.

Answers

Answer:

I was late to dinner; there was a traffic jam.

Explanation:

Answer:

I was late to dinner; there was a traffic jam.

Explanation:

I'm pretty sure this is the answer, both are two independent clauses. If not it might be "I was late to dinner, there was a traffic jam".

Who is the speaker of the 'Mending Wall:?
O the poet, Robert Frost
O Robert Frost's neighbor
O the apple orchard owner
O the father of the neighbor

Answers

Answer: the apple orchard owner

The poem says “My apple trees will never get across
And eat the cones under his pines, I tell him.”

The speaker in "Mending Wall" is the poet, Robert Frost. A poet is a person who writes poetry. Poetry is a form of literature that uses aesthetic and rhythmic qualities of language  The correct option is A.

Who was Robert Frost ?

Robert Frost was an American poet who lived from 1874 to 1963. He is known for his realistic depictions of rural life, as well as his use of traditional verse forms such as blank verse, rhyme, and meter.

Some of his most famous poems include "The Road Not Taken," "Stopping by Woods on a Snowy Evening," and "Mending Wall." Frost won four Pulitzer Prizes for Poetry during his lifetime and is considered one of the most significant American poets of the 20th century.

The poet, Robert Frost is the speaker of the 'Mending Wall. Thus, the ideal selection is option A.

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I was stunned. A call-up: everyone knows what that means. Visions of concentration camps and lonely cells raced through my head. How could we let Father go to such a fate?

Which word best describes the mood of this excerpt?

isolation
fear
anger
confusion

Answers

Answer:

Fear

Explanation:

Plz, Help me with this question?

Answers

Answer:

B

Explanation:

not sure sure but it might be B

Help! Who knows what song this is

Come stop your crying
It will be alright
Just take my hand
Hold it tight

I will protect you
From all around you
I will be here
Don't you cry

For one so small,
You seem so strong
My arms will hold you,
Keep you safe and warm

This bond between us
Can't be broken
I will be here
Don't you cry

'Cause you'll be in my heart
Yes, you'll be in my heart
From this day on
Now and forever more

You'll be in my heart
No matter what they say
You'll be here in my heart always

Why can't they understand the way we feel?
They just don't trust what they can't explain
I know we're different but deep inside us
We're not that different at all

And you'll be in my heart
Yes, you'll be in my heart
From this day on
Now and forever more

Don't listen to them
'Cause what do they know (what do they know)?
We need each other
To have, to hold.
They'll see in time
I know

When destiny calls you
You must be strong (you gotta be strong)
I may not be with you
But you've got to hold on
They'll see in time
I know
We'll show them together

'Cause you'll be in my heart
Believe me, you'll be in my heart
I'll be there from this day on,
Now and forever more

Oh, you'll be in my heart (you'll be here in my heart)
No matter what they say (I'll be with you)
You'll be here in my heart (I'll be there) always

Always
I'll be with you
I'll be there for you always
Always and always
Just look over your shoulder
Just look over your shoulder
Just look over your shoulder
I'll be there always.

Answers

You'll be in my heart by phil collins(Tarzan-Disney)

Explanation:

Answer:

You'll be in my heart by Phil Collins

Explanation:

what are you doing today?

Answers

crying because i hate my math

Answer:

I'm just doing homework. if we're getting into specifics then I'm working on a map, biology thing, and something with health. I might also read a book just to prove someone wrong.

Explanation:

You asked and I responded

Please please please help me, I beg you I beg you. Read the lyrics and answer question. What does Juanes do when he encounters a problem? What helps Juanes to persevere? Who helps Juanes to persevere?

When life hits me and gets me down
is when I feel the most the need to rise up
that facing the fear is a way to defeat it
I won't give up, I won't give my life to fear
fear is a murderer who kills the feelings
everytime I am alone is because God is here, inside

And I need silence to be able to find
my own voice and my truth
And at the and of darkness
I don't feel alone, I know you are with me

Today I'll rise and I won't resign my heart
to do what I wanted but I wasn't able to
I won't accept today, I will try to be better
life has a solution, there's nothing impossible
I don't believe in "never"...no!

If giving up is a way of dying
then I never want to please death
I think about my family, my heart beats stronger
One can't live thinking about the day he'll die
and they say that dreaming is like dreaming while being alive
And I believe in the present, and that is getting me away from death

And I need silence to be able to find
my own voice and my truth
And at the and of darkness
I don't feel alone, I know you are with me

Today I'll rise and I won't resign my heart
to do what I wanted but I wasn't able to
I won't accept today, I will try to be better
life has a solution, there's nothing impossible
I don't believe in "never"...no!

Answers

I think he is afraid of muffuletta god helps him not feel alone and he thinks about his family realizing the pain he will give them but I’m sure good luck:)

Subject: Grammar The Simple and Progressive Past Tenses A-Fill in the blanks with the simple past tense of the given verbs: All of a sudden, Jake (feel) earthquake beneath his feet. It (be) ............ not strong enough to frighten anybody, but Jake, who (have) .already felt dozens of shocks, (think) ... it (be)... .......odd. The houses several times, then all again. Soon, he (notice) below (shake) (become)....... (darken) ...still something even stranger. The sea ...all of a sudden and (seem) to be rushing backward. B-Supply the correct simple or continuous past tense verb. 1. In 1995, a team of scientists (study) space when they (discovered) satellites. 2. Around ten years ago, I (climb). Baboquivari Peak. I (climb) peak and (enjoy). of each outer eleven Jovian this beautiful the fascinating desert landscape when a sudden incident (change) my perspective. 3. They (go) (indicate) up a steep slope when their maps that they (approach) their destination. 4. Two years ago, scientists from the University of Chicago (find) while they (dig) the most complete skeleton of dinosaur for fossils in Nigeria.​

Answers

Answer:

All of a sudden, Jake felt earthquake beneath his feet. It was not strong enough to frighten anybody, but Jake, who had already felt dozens of shocks, thought it was .odd. The houses several times, then all again. Soon, he noticed  below shaking became darkened still something even stranger.

none of this really makes sense 2 me but yeah ask you teacher or a friend sorry I tried

Use the following terms in a paragraph: expectations, universal, impression, stereotypes, identity, and knowledge

Answers

Answer:

Paragraph: Throughout the 21st century many gender identity and stereotypes have been bent and broken, especially with the younger generation. Many people have began to change there ways in where there is really no gender on clothes or how one should dress and act. The universal ideas and expectations of course, is that certain things and practices are for a certain gender, like ballet is for girls and football is for boys. The 21st century, teens and young adults manly, with their knowledge, have made a clear impression that those gender identities are not needed and should not be held so firm for those genders.

What is Consensual Means

Answers

Answer:

existing or made by mutual consent without an act of writing a consensual contract.

Explanation:

Answer:

Consensual means is a mutual consent without writing a consensual act; or a mutual consent based on or involving a consensual act.

Hope this helps, have an amazing day :)

Explanation:

what is revealed about Logan’s past that may help to explain why Logan is older and more established than Janie's at the time of their marriage?

Their Eyes Were Watching God
chapter 4

Answers

Answer:

logan was a mistake and then got arrested

Explanation:

help!! choose the sentence that uses indigenous correctly :) read the passage and answer the question

Answers

the answer is B
hope this helps

Which of the following words best fits into the sentence below in ancient freeze pilgrims would flock to Athens in order to_____ the goddess Athena in her temple PLEASE HELP!

Answers

Answer:

where is the option?

Explanation:

Answer:

Venerate "to give great respect."

Explanation:


Study your family structure and appraise it in terms of the care and attention you receive. How
is this affecting your personal development as an adolescent​

Answers

Answer:

All right since i cant really give an answer ill tell you what to do in simpler terms Look at how your family structure (Relationship family has with eachother, divorce that stuff.) then you need to write down how this system affects the care and attention you receive and then answer if it affects your development (i.g what do you do and how you act)

Explanation: i hoped this helps

Family structure alludes to the blend of family members that include a family.

 Monetary family alludes to a gathering of at least two people who live in a similar dwelling and are identified with one another by blood, marriage, precedent-based law or reception. A couple might be of inverse or same sex.

Family unit a nuclear family comprising of two grown-ups and quite a few youngsters living respectively. The youngsters may be natural, venture or embraced.

More distant family grandparents, aunties, uncles, and cousins, either all residing close by or inside a similar family. Reconstituted family otherwise called a stage family.

A conventional family is a family structure that comprises of a man, lady, and at least one of their organic or took on kids. In most conventional families, the man and lady are a couple.

These include living together, single parent, expanded, and same-sex families

Family care stays the most well-known sort of youngster care course of action across all conjugal and business situations with.

3/4 of full-time utilized moms  use some type of family care to some extent a piece of the time, contrasted with 86.3 percent of low maintenance utilized moms.

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10 points ill give brainliestttttttttttttttttt

Answers

Answer:

C

Explanation:

30 POINTS!!!!

As you read the paragraph below, decide how relevant each detail is.



The two rowers carefully held both sides of the boat. One at a time each rower climbed into the boat and sat in her seat. When both rowers were in place, they grabbed the oars beside them. The oars were long and made of wood. The rowers pushed away from the dock.



Which fact above is the least relevant?
Select one:

a.
When both rowers were in place, they grabbed the oar beside them.

b.
The oars were long and made of wood.

c.
One at a time each got on and sat in their seat.

d.
The two rowers carefully held both sides of the boat.

Answers

The answer is B.
The oars were king and made of wood.

please help. ill give brainiest

Answers

Answer:

fact

stat

anecdote

expert opinion

Explanation:

Answer:

hi

Explanation:

info that has been proven to be true = fact

info in the form of numbers = statistic

a true story = anecdote

judgment of an authority on a subj = expert opinion

Other Questions
A force has both______ and _______. Question 3 options: Magnitude & Direction Direction & Motion Speed & Impact Speed and Direction Why does the inclusion of an author make a source more credible?You can learn if others share the same opinions as the author.You can research more about his/her frame of reference and bias.You can contact the author to ask questions.You can attack hem/her personally. 9,660 23 = equation 3a^4b^-2c^3 simplifed how does breathing helps you sound better when you're singing. what are the missing numbers pls do it in order!!! :) 4. What is the probability that an offspring will have a yellow seed? (1 poin25%37.5%075 It is recommended that women of childbearing age take folic acid daily for prevention of a. neural tube defects. b. hydrocephalus. c. cerebral palsy. d. seizure disorders. select all of the words that have a spanish origin.tornadobaroquetortillapotatoranch Why do you think someone do not like the untied states now? What are the coordinates of B' after the translation? (1, 6) (3, 6) (0, 0) (3, 1)will mark brainlyest A water molecule has 2 hydrogen atoms and 1 oxygen atom. If you were to add an additional oxygen atom to the molecule, would it still be water? If not, what would it be? Which set of numbers could represent the lengths of the sides of a right triangle?O 16, 32, 36O 8, 12, 16O 3,4, 5O 9, 10, what are your thoughts on credit cards and savings accounts? Can someone write an Analytical Paragraph about the louisiana purchase? I gave away my hundred points but here's 23. please help it would mean a lot (repost) SOMEBODYYY HELPPPPP!!! someone calls the collective grouping of all citizens the "sovereign," and claims that it should be considered in many ways to be like an individual person. What might 2 people reply back Or responses back?? please help before it is 10 Pm.. Now it is 9:40 PMPLEASEEEEEE HELPPP WILL MARK BRAINLIEST 100% Which lighting source has lower energy costs and a longer life but can be dangerous?a. fluorescentb. laserc. incandescent d. neon Which of the following factors is a drawback of maximum sustainable yield(MSY) management?O A. It does not account for all the complexities in populations.OB. t is difficult to implement, track, and regulate.OC. It is based on trial and error.OD. It might take many attempts to succeed. Anyone know Im confused According to the diagram, what happens to the female population betweenthe ages of 9 and 19? A. It triples in size, from 3 to 9 individuals.B. It grows steadily.C. It remains the same size.D. It drops from 9 to 3 individuals