Category: Cobb Vicki

Flying into the Eye of a Storm

10/5/2021

Vicki Cobb

The Master Chef of Kids’ Hands-On Science

Dr. Hugh Willoughby, of Florida International University, was one of the first meteorologists to ever fly into the eye of a hurricane.  Now the job is done by the Hurricane Hunters—a team of pilots, navigators and meteorologists who fly into these dangerous storms to help keep us safe.  Here’s what I learned when I interviewed Hugh Willoughby:

What is a hurricane eye?

Hurricanes are circular storms so the wind blows around in a circle. The eye is the center of a hurricane.  If a circular storm doesn’t have an eye, it is not a hurricane—it’s a tropical storm.  The eye is surrounded by a ring of clouds called the eyewall. Within the eye, there is a calm area that is cloudless all the way up to space.   The winds are strongest just at the inner edge of the eyewall, which is composed of violent thunderstorms with strong updrafts and downdrafts.   The hurricane pinwheels out from the eyewall as spiral bands of wind and rain, which stretch for miles.  When a hurricane’s eye passes over land, the storm suddenly stops and the sun comes out.  But the relief is short-lived as the other side of the storm soon slams into the area.

How do Hurricane Hunters help us?

Hurricane Hunters fly into the eye of hurricanes that are heading towards our shores to help predict where the storm will make landfall.  On every mission they must find the center of the storm at least twice and at most four times over a period of several hours because the change in position of the center of the eye tells us the direction the storm is moving and how fast it is moving. They also drop packages called dropsondes that contain measuring instruments for air pressure, humidity, and wind speed at the eyewall.  These measurements tell us the destructive power of the storm or its “category.” During a hurricane season (from June 1 to November 30) the Hurricane Hunters and their fleet of ten airplanes can get data on three storms, twice a day.  So flying into a hurricane’s eye is pretty routine for them.

Is it dangerous?

The planes can easily handle changes in air pressure and wind speeds that create “bumps” and it can be pretty bumpy going through the eyewall.   But, in more than sixty years there have been only four accidents. All on board agree that the view of the eyewall from inside the eye is worth it! The plane has transported them inside nature’s most magnificent amphitheater.
(c) Vicki Cobb 2014

Harvey and Irma have alerted everyone to the dangers of a hurricane. We can predict the course of a hurricane by flying into a hurricane and repeatedly measuring wind speed, humidity, air pressure, and temperature. Here's a video that will give you a taste of what it looks like as you approach an eye wall. It is filmed from a plane penetrating Hurricane Katrina.

When you hear about a Category "3" hurricane, or any other category number, the Saffir-Simpson Scale tells you just what that number means.

Look at the amazing number of instruments contained in a Dropsonde.

Vicki Cobb's latest book, How Could We Harness a Hurricane? shows how the scientific understanding of air, water and energy come together to form hurricanes. It includes lots of hands-on activities that you can do. Engineers look at science and try and figure out ways the steer a hurricane away from populated areas or weaken them. There are lots of questions in the book and some of them don't have answers, yet.

MLA 8 Citation
Cobb, Vicki. "Flying into the Eye of a Storm." Nonfiction Minute, iNK Think Tank, 18 Sept. 2017, www.nonfictionminute.org/the-nonfiction-minute/ flying-into-the-eye-of-a-storm.

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September 11, 2001

9/5/2021

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by Vicki Cobb
The Master Chef of Kids' Hands-on Science

See note at end. This is now history. Babies born around this time are now adults.

A cowardly bully came out
of his cave today to
trespass on our shining city.
Out of the blue
he had the nerve
to punch out its
two front teeth.
The pain is excruciating;
Bleeding is everywhere.
The remaining stumps are
grotesque.
We've lost our pretty smile.
We can't bite a big apple.
It's hard to look at mutilation.

Dazed, we check for damage.
Although choking on thick air,
we are very much alive.
Our heartbeat is strong.
There is no drop in our vital signs.
Blood rushes in to replace
blood lost.
Slowly we discover
we can still chew
and make a fist and
think.

Oh yes, we'll make sure
this "holy" terror
can never return
to our playground
or our friends.'
But how?
How do we shadow box
a villain who doesn't
play by the rules?
We see evidence
of our noble,
generous,
and loving spirit.
Yet hate destroys
within as well as without.

Here then is our challenge:
We must keep this wound
from festering
becoming toxic to ourselves.
We must imagine the unimaginable
to thwart evil
before it comes back for more.
We must seek justice,
not vengeance to
preserve our soul.
We must trust our leaders
who see more
than this one tormenter.
We must be brave
and patient
and faithful.

As good as we believe
ourselves to be,
we must become better.

Scar tissue is stronger
than unscarred.

Text copyright © 2001 by Vicki Cobb

Reflection: I wrote this poem on September 12, 2001. I am a New Yorker. One grandson, who was 4, was starting school, a few blocks from ground zero. My husband was working in the city. It was a terrible day. I wrote this poem to try and make sense of it for my readers. Do you think it is still true today?

Here I am in 2014 on the 43rd floor terrace in lower Manhattan. The brand-new Freedom Tower, on the site of the Twin Towers lost on 9/11, soars behind me. It is 1776 feet tall.

Vicki Cobb is the author of about 95 books. The book that first got her noticed was Science Experiments You Can Eat. It has become a classic. This is the cover of the third revised edition of the book, published in 2016.

MLA 8 Citation
Cobb, Vicki. "September 11, 2001." Nonfiction Minute, iNK Think Tank, 11 Sept. 2017, www.nonfictionminute.org/the-nonfiction-minute/category/cobb-vicki.

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The Battle Hymn of the Chicken Pox Troopers

4/27/2021

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Vicki Cobb
The Master Chef of Kids’ Hands-on Science

How does a virus cause a disease? A virus is not a complete living thing. It is like a free-floating nucleus of cell. It doesn’t “grow” but under certain conditions it can make a copy of itself or reproduce. It invades the cells of other living things to use the internal structure of the host cells to reproduce. At a certain point, the number of new viruses in a cell is so large that the cell ruptures and dies, spilling out newly made viruses to continue the invasion to other uninfected cells.

One virus we understand very well is chicken pox. Chicken pox is a very contagious disease that enters the body through the air and affects mostly children. When I was young almost every kid got chicken pox but, since 1995, there has been a vaccine, which makes you immune and protects the spread of the disease to others. Is there another way to explain how this virus works? Suppose I imagine a virus could think, which it can’t. But, imagination gives me the freedom to think differently.

So I wrote a poem about an army of chicken pox viruses as they are about to attack a human being, maybe you, my reader. A “battle hymm” is a chant or a song to rally the troups just before an attack.

The Battle Hymn of the Chicken Pox Troopers

Charge forward, fellow viruses!
Invade a cell or two
Then let us join together
And make a chicken pox on you.

Let cells try to fight us
No matter what they do
Red spots of our graffiti
Make a chicken pox on you

We make the top skin separate
And fill the space with goo,
Small, itchy blisters are a stage
Of chicken pox on you.

And when the blisters break, my friend
You think perhaps we’re through
But no. Now there is a scab
For each chicken pox on you

Scratch a scab so it comes off
Baring skin that’s raw and new,
A scar forever marks the spot
Of that chicken pox on you.

The source? Chicken with fowl pox

To the battle, fellow viruses!
We’re more noteworthy than flu
They just make you feel sick
We make our chicken pox on you!

Meet your personal superheroes - your body's cells Superhero cells rally together to battle common childhood ailments in this series in which Vicki Cobb explains how your amazing human body heals itself and fights off intruders. Here's her book on yet another virus: Your Body Battles a Cold.

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A Bouncing Ball Like You've Never Seen

3/30/2021

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Vicki Cobb
The Master Chef of Kids’ Hands-on Science

You can’t play tennis unless you know where the ball will be after it bounces. You can’t pass a basketball unless you understand how to angle a bounce so that it goes where you want it to go. As long as the court surface is smooth and flat, a ball’s bounce is very predictable. Its path depends on gravity and on the strength and direction of the force that sets the ball in motion. Thanks to high speed photography we can get a closer look at a bouncing ball.

This is a multiple exposure photograph of a bouncing ball. It was taken in complete darkness with the camera shutter open while a high-speed flashing light, called a stroboscope or strobe, flashed 30 times a second. Each flash produced an image.

Here’s what you can learn from this photo: The ball is moving fastest where the images are farthest apart and slowest where they are closest together. When the ball is falling, it speeds up. After it bounces and moves opposite the pull of gravity, it slows down at exactly the same rate as it sped up when it was falling until it stops for an instant and starts falling again. Each time it collides with the ground, some energy is lost. That’s why each bounce loses altitude. If the bounce were perfect, no energy would be lost, every bounce would be as high as the last and the ball would bounce forever.

A strobe also captures the split second when a tennis ball is struck by a racket. The collision flattens the ball, and stretches the strings and distorts the frame of the racket, all in .005 seconds. If these objects kept their distorted shapes, most of the force of the collision would be absorbed. But they are elastic—they restore themselves to their original shapes after they collide. This restoring force is transferred to the ball to change its direction and help add to the speed of the athlete’s swing. The fastest serve leaves a racket at 130 miles an hour. In a rally, a ball-racket collision changes direction of the ball so it is not as fast as a serve, maybe 70 miles per hour. Since the distance between images made by a strobe tells how fast an object is moving, strobes are part of the instruments used to measure the speed of balls from a tennis racket and a baseball pitcher.

Photo credit: C. E. Miller, MIT

In this MIT YouTube, a ball is dropped in front of a meter stick and lit by a strobe light. A long exposure photograph captures the position of the ball at each evenly spaced flash of light. The acceleration of the ball can then be measured from the photo.

Would you believe that you could throw an egg across the room without breaking it? Burn a candle underwater? Vicki Cobb's We Dare You! is a gigantic collection of irresistible, easy-to-perform science experiments, tricks, bets, and games kids can do at home with everyday household objects. Thanks to the principles of gravity, mechanics, fluids, logic, geometry, energy, and perception, kids will find countless hours of fun with the selections included in this book. If you would like to make a We Dare You Video, click here.
Vicki Cobb is a member of iNK's Authors on Call and is available for classroom programs through Field Trip Zoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more.

MLA 8 Citation
Cobb, Vicki. "A Bouncing Ball Like You've Never Seen." Nonfiction Minute, iNK
Think Tank, 5 Feb. 2018, www.nonfictionminute.org/the-nonfiction-minute/
a-bouncing-ball-like-you've-never-seen.

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Marie Curie: An Elite Player in the Science Game

3/6/2021

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Vicki Cobb
The Master Chef of Kids' Hands-on Science

In October, 1891, 23-year-old Manya Sklowdowska arrived in Paris to attend the Sorbonne, France’s great university. She had saved money, working as a governess to get there. She was determined to make the most of her studies in science and math. Right away she was noticed partly because she was Polish, although she had changed her first name to a French version, Marie, to fit in better. She always sat in the front row of all her classes because her French was not yet fluent and she didn’t want to miss anything. She also was one of only a few female students. In a university full of smart people, she worked hard to excel. She ultimately finished first in her class and went on to make major scientific discoveries.

What made Marie so single-minded and determined? Behind it all was a great love for science, a love she shared with her husband, Pierre Curie, whom she met in 1894. At that time, science was uncovering unimaginable truths in chemistry and physics. New discoveries were being made at a breath-taking pace. Science was like a game and it attracted many players. Why?

1.       There was a Nobel Prize for winners, those who discovered a big idea about the natural world. There was only one nature to discover but people came at it from many directions.

2.       It was collaborative—scientists shared their discoveries by publishing papers.

3.       It was competitive—the papers described procedures so that scientists could check each other’s work. It kept everyone honest. The best work got the most attention.

4.       The discoveries could be applied to solve problems for people. X-rays, light bulbs, phonographs, photographs, movies, and telephones would not have been possible without science.

5.       The biggest prize was the idea of the atom and its structure. Many scientists contributed to modern atomic theory, including Marie.

Marie Curie won the Nobel Prize twice for her work. At a time when women didn't even have the right to vote, she was a working mother of two daughters, a single mother after she was widowed in 1906, the founder of the Radium Institute for research and she brought the x-ray to the battlefield in WWI. She believed that science could save the world, that scientific discoveries belonged to everyone. And she refused to benefit financially from her discoveries. She lived by the highest principles of honesty and integrity. She was a true champion of the science game.

Young Marie Curie (left) with her father and sisters.

Marie and Pierre Curie with their daughter Irene.

Marie Curie's 1903 Nobel Prize portrait

Pierre and Marie Curie in their laboratory.

DK Biography: Marie Curie tells the story of the discoverer of radium, from her childhood in Warsaw, to her experiments with radioactivity in Paris, to her recognition as one of the preeminent scientists of her time.
Filled with archival photographs and amazing fact boxes, this biography paints Marie Curie as the brave and brilliant scientist that she was.

Vicki Cobb is a member of iNK's Authors on Call and is available for classroom programs through Field Trip Zoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more.

MLA 8 Citation
Cobb, Vicki. "Marie Curie: An Elite Player in the Science Game." Nonfiction
Minute`, iNK Think Tank, 30 Jan. 2018, www.nonfictionminute.org/
the-nonfiction-minute/Marie Curie-An-Elite-Player-in-the-Science-Game.

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Flying into the Eye of a Storm

September 11, 2001

The Battle Hymn of the Chicken Pox Troopers

A Bouncing Ball Like You've Never Seen

Marie Curie: An Elite Player in the Science Game

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