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)
Question 1 options:

1)

Mystery

2)

Breath

3)

Language

4)

Message im in the middle of an English test will someone pls help me

Answer:

D

Explanation:

Parallel structure does not mean using the same pattern of words.

Parallel structure means using the same pattern of words the following is not true about parallel structure. Thus, option (D) is correct.

Used to define a set of lines, routes, etc. that are spaced equally apart throughout their whole length and do not touch. parallel rails for a train. Two parallel pairs of lines form a square. Parallel rows are used to plant the corn. The lines are perpendicular to one another.

The repeating of a certain grammatical form within a sentence is known as parallel structure, sometimes known as parallelism. You can establish a parallel construction by ensuring that each compared thing or idea in your sentence follows the same grammatical pattern. Example Not Parallel: Ellen enjoys afternoon naps, hiking, and the rodeo.

Therefore, Thus, option (D) is correct.

Learn more about the Parallel here:

https://brainly.com/question/28568817

#SPJ2

Answer:

The message would have more of an effect if it is written or spoken in a language that the audience/readers are familiar with.

Explanation:

Answer:

What are five socio economic factors that can influence your study choices and your future career

Gender and equity.

Personal preferences.

The economic status of the student and the family.

Employment opportunities for the course being studied.

Religion and beliefs.

Explanation:

Hope it helps

Answer:

It is either

A. Since it is handwritten, a letter carries a more personal feel and emotional appeal.

or

B. A collection of old letters shows how important it is to stay in touch with each other

Answer:

Background Essay on Decision to drop the Atomic Bomb

_____________________________________________

World War II was fought by millions of people in all corners of the world. There were battles

and military posts in surprising places. The Caribbean and Central America, Greenland, Alaska,

and the Aleutian Islands, Iraq, Syria, Burma, and the Arctic are a few of the little known places

that were involved. Every major country of the time was involved in the war.

Conflict in the Pacific began well before the official start of World War II. Seeking raw materials to fuel its growing

industries, Japan invaded the Chinese province of Manchuria in 1931. By 1937 Japan controlled large sections of China

and accusations of war crimes against the Chinese people became commonplace. At this time, several treaties were in

place to limit the size of navies in the Pacific Ocean. In 1934, Japan ended its cooperation with other major powers in the

Pacific by withdrawing from the Five Power Treaty. The United States, along with other countries, criticized Japanese

aggression but shied away from any economic or military punishments.

Relations between the United States and Japan worsened when Japanese forces took aim at Indochina with the goal of

capturing oil rich areas of the East Indies. Responding to this threat, the United States placed an embargo on scrap

metal, oil, and aviation fuel heading to Japan and froze Japanese assets in the United States. Furthermore, the United

States demanded that the Japanese withdraw from conquered areas of China and Indochina. Japan, sensing conflict was

inevitable, began planning for an attack on Pearl Harbor by April, 1941.

The Japanese bombing of Pearl Harbor on December 7, 1941, brought the United States officially into World War II. In

the surprise attack, Japan sunk several ships, destroyed hundreds of planes and ended thousands of lives. The Japanese

goal was to cripple the U.S. Pacific fleet, and they nearly succeeded. President Franklin Roosevelt called the attack “a day

which will live in infamy,” and the American people were shocked and angered.

The ensuing war was costly. Years of fighting brought the US armed forces closer and closer to Japan as they “hopped”

from one island to another. The Japanese were vicious fighters, however, and every victory cost more time, material,

and, sadly, lives. The last major battle, the fight for Okinawa, lasted almost three months and took more than 100,000

Japanese and American lives.

After President Roosevelt died on April 12th

, 1945, it became Harry Truman’s job to decide how to end the war. The

thought of invading Japan gave Truman and his advisors pause. The war had shown that the Japanese were fighting for

the Emperor who convinced them that it was better to die than surrender. Women and children had been taught how to

kill with basic weapons. Japanese kamikaze pilots could turn planes into guided missiles. The cost of invasion, they knew,

would be high.

Upon becoming president, Harry Truman learned of the Manhattan Project, a secret scientific effort to create an atomic

bomb. After a successful test of the weapon, Truman issued the Potsdam Declaration demanding the unconditional

surrender of the Japanese government, warning of “prompt and utter destruction.” Eleven days later, on August 6, 1945,

having received no reply, an American bomber called the Enola Gay left the Tinian Island in route toward Japan. In the

belly of the bomber was “Little Boy,” an atomic bomb. At 8:15 am Hiroshima time, “Little Boy” was dropped. The result

was approximately 80,000 deaths in just the first few minutes. Thousands died later from radiation sickness. On August

9, 1945, another bomber was in route to Japan, only this time they were heading for Nagasaki with “Fat Man,” another

atomic bomb. After the first minute of dropping “Fat Man,” 39,000 men, women and children were killed. 25,000 more

were injured. Both cities were leveled from the bombs and this, in turn, forced Japan to surrender to the United States.

The war was finally over.

Today, historians continue to debate this decision. Was there another way to end the war? If you were President

Truman in 1945, would you have dropped the bomb?

The Second Great War was battled by a large number of individuals in all edges of the world. There were fights and troop installations in astonishing spots. The Caribbean and Central America, Greenland, Alaska, and the Aleutian Islands, Iraq, Syria, Burma, and the Arctic are a couple of the mostly secret places that were involved.

Struggle in the Pacific started well before the authority beginning of World War II. Looking for natural substances to fuel its developing ventures, Japan attacked the Chinese area of Manchuria in 1931.

By 1937 Japan controlled enormous segments of China and allegations of war violations against the Chinese public became typical. Right now, a few settlements were set up to restrict the size of naval forces in the Pacific Ocean.

In 1934, Japan finished its collaboration with other significant powers in the Pacific by pulling out from the Five Power Treaty. The United States, alongside different nations, reprimanded Japanese animosity however avoided any monetary or military disciplines.

Relations between the United States and Japan deteriorated when Japanese powers trained in on Indochina determined to catch oil rich region of the East Indies. Answering this danger, the United States put a ban on salvaged material, oil, and flight fuel making a beeline for Japan and froze Japanese resources in the United States.

Moreover, the United States requested that the Japanese pull out from vanquished areas of China and Indochina. Japan, detecting struggle was unavoidable, started anticipating an assault on Pearl Harbor by April, 1941.

For more information about atomic bomb, refer the following link:

https://brainly.com/question/27014464

Answer:

I love brent faiyaz and sza

Explanation:

they are a gift from god

Answer:

The whole family is glad that Ultima has come to stay with them. Mária is happy to have a woman to talk to, and Antonio’s two older sisters are happy to have someone to help with their chores so that they can spend more time playing together with dolls. Gabriel talks to Ultima about his desire to move to California, a wish he now feels will never come true because his older sons are fighting in World War II, and he cannot move his young family alone.

Explanation:

Answer:

Explanation:

OOOOOOHOOH|OHOOh

Answer:

He is not to get noticed.  He probably is running from something.  The sentences you should circle include sentence 2 where he talks about how he is sitting low in the seat and pulling his cap over his face as much as possible.

The other sentence that comes after 7 Eleven should be circled too - "I'm way down in the seat..."

Someone is going to sit beside him and he will not have 2 seats to himself and he will not be able to shield himself as much.

Explanation:

using inferences to predict what will happen next

The correct answer to this open question is the following.

The usefulness of the mobile phone.

There is no single day that we watch the news or read the newspaper and find criticism to social media and the time people spent on their mobile phones, practically, wasting their time. Specifically in youngsters. There is no day that mass media generates more controversy in the way mobile phones are involving younger generations in entertainment and social media that rally do no generates something positive.

But it is time to put a stop to that and see the other side of the coin.

Instead of focusing on what is wrong with mobile phones, let's remember the many positive uses a mobile phone has.

And besides all of this banal discussion, it is not the fault of the mobile phones. It is the way people use it.

A mobile phone can or should be very useful in the workplace. There are hundreds if not thousands of uses apps to make your job easier. You can download apps to make your daily work more efficient and productive.

Your mobile phone helps you to stay connected all the time with employees, co-workers, clients, suppliers, providers, legal offices, government offices, and family members. From the mobile phone you can manage your financial transactions, bank account operations, you can make payments, deposits, withdrawals, and check your balance account.

There is no need to leave the office of your home to do hundreds of productive things every day.

In the case of youngsters, it is all matter of communication and supervision to let them understand the important balance between academics and entertainment using the mobile phone.

As there are thousands of apps to help us in the workplace, there is a similar number of apps to help students to improve the learning process.

Apps to help you do research, to improve grammar, mathematics, history, every single topic. You name it.

Of course, an app is only a tool, students must show the commitment and focus to use the tool to improve learning and get better grades.

Again, it is a question of mobile phones being good or bad. It is a question about the responsible a productive use of these devices.

Answer:

I think it's three

Explanation:

The words 'extremly' & 'difficult' & 'hundred' are adjectives.

Answer:

When you quote directly from a source, enclose the quoted section in quotation marks

Explanation:

Add an in-text citation at the end of the quote with the author name and page number, like this: "Here's a direct quote" (Smith 8). "Here's a direct quote" ("Trouble" 22)

Answer:

Around $14,069

Explanation:

12500 × 0.03 = 375               12500 + 375 = 12875

12875 × 0.03 = 386.25               12875 + 386.25 = 13261.25

13261.25 × 0.03 ≈ 397.84               13261.25 + 397.84 = 13659.09

13659.09 × 0.03 ≈ 409.8                    13659 + 409.8 = 14068.89

Answer:

14,000

Explanation:

Answer:

It is important in the matters of love goes in formal.  Thinking for yourself will make you happy in the end is formal writing. Sure "like" is good for now is informal. You might act like you know it all but your really smart is informal. I disagree with your friend is formal. Hey your really good with words is informal. You're such a dork is informal.

Explanation:

Answer:

computer

Explanation:

if i sell ill buy a new one

This one is really hard especially since it's a baby omg! i.d.k? I would let my child cry cause i.d.k these people.

Answer:

Answer down below!

Explanation:

The detail,

"Lifting weights increades strength and improves coordination and balance."

shows how weight training can benefit you!

hope this helps!

Answer:

Education is the key of success.

Explanation:

Nowadays education is like a paid job just doing it for the money. People are so greedy they have forget their loyal work.

Answer:

ok

Explanation:

Answer:

class distinctions

Explanation:

I am glad you are flying free.I wish I could.I know you might not what to hear this but can you please subscribe to my you-tube channel Smart Slideshows.I am trying to get 1,000 subscribers so I can pay my mom's expensive bills

Answer:

Jack said there was a dog that was a high-flying, nineteenth-century trapeze artist; his claim is intriguing, yet highly unlikely.

Explanation:

Hyphens are used when there is a need to form a compound adjective that comes before a noun. This enables the compound adjective to modify or describe the noun that follows. But when the compound adjective comes after a noun, then there is no need to hyphenate the word.

In the given sentence, the words "high flying" and "nineteenth century" are used to describe the word "artist" which is a noun. Therefore, they are hyphenated to make a compound adjective and help describe the artist dog,

Thus, the final sentence will  be written as-

Jack said there was a dog that was a high-flying, nineteenth-century trapeze artist; his claim is intriguing, yet highly unlikely.

Answer:

The word which best describes the mood of this stanza is:

C. sorrowful

Explanation:

In the stanza we are analyzing here, the speaker speaks of "joy departed", that is, joy that is gone and can no longer be grasped. The speaker dreams of such joy, of "life and light", but those dreams end up making him even sadder. They remind him of the happiness he will no longer have, which leaves him broken-hearted. Therefore, the best word to define the stanza is C. sorrowful.

Edgar Allan Poe's works are somber. Feelings of sadness, depression, or anger are often explored and brought to life in his poems and short stories.

Answer:

joe needs a wife

Explanation:

Answer:

Mostly violence, but also hate speech.

Explanation:

As most people know, a lot of people in america were racist at that time. People yeeled curses at him, tried to kill him, (and eventually they did) and people even threw a bomb in his house once.