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88 pages

English

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You loved the bestselling picture books starring Rosie Revere, Ada Twist, and Iggy Peck. Now you can follow The Questioneers' further adventures in all-new chapter books! Don't miss the first instant New York Times bestselling volume, Rosie Revere and the Raucous Riveters. In Ada Twist and the Perilous Pants, Ada must rely on her curious mind, her brave spirit, and her best pals Rosie Revere and Iggy Peck to solve a mystery in her own backyard. Ada Twist is full of questions. A scientist to her very core, Ada asks why again and again. One question always leads to another until she's off on a journey of discovery! When Rosie Revere's Uncle Ned gets a little carried away wearing his famous helium pants, it's up to Ada and friends to chase him down. As Uncle Ned floats farther and farther away, Ada starts asking lots of questions: How high can a balloon float? Is it possible for Uncle Ned to float into outer space? And what's the best plan for getting him down? Collect them all! Add these other STEM favorites from #1 New York Times bestselling team Andrea Beaty and David Roberts to your family library today! Rosie Revere, EngineerAda Twist, ScientistIggy Peck, ArchitectRosie Revere and the Raucous Riveters Ada Twist's Big Project Book for Stellar ScientistsIggy Peck's Big Project Book for Amazing ArchitectsRosie Revere's Big Project Book for Bold EngineersThe Questioneers Family Calendar, coming May 2019!

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Publié par	ABRAMS BOOKS
Date de parution	16 avril 2019
Nombre de lectures	4
EAN13	9781683354765
Langue	English
Poids de l'ouvrage	8 Mo

Informations légales : prix de location à la page 0,0702€. Cette information est donnée uniquement à titre indicatif conformément à la législation en vigueur.

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OTHER BOOKS BY ANDREA BEATY AND DAVID ROBERTS
Iggy Peck, Architect
Rosie Revere, Engineer
Ada Twist, Scientist
Rosie Revere s Big Project Book for Bold Engineers
Iggy Peck s Big Project Book for Amazing Architects
Ada Twist s Big Project Book for Stellar Scientists
Rosie Revere and the Raucous Riveters

PUBLISHER S NOTE: This is a work of fiction. Names, characters, places, and incidents are either the product of the author s imagination or used fictitiously, and any resemblance to actual persons, living or dead, business establishments, events, or locales is entirely coincidental.
Cataloging-in-Publication Data has been applied for and may be obtained from the Library of Congress.
ISBN 978-1-4197-3422-9 eISBN 978-1-68335-476-5
Text copyright 2019 Andrea Beaty Illustrations copyright 2019 David Roberts Book design by Chad W. Beckerman
Published in 2019 by Amulet Books, an imprint of ABRAMS. All rights reserved. No portion of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by a ny means, mechanical, electronic, photocopying, recording, or otherwise, without written permission from the publisher.
Amulet Books and Amulet Paperbacks are registered trademarks of Harry N. Abrams, Inc.
Amulet Books are available at special discounts when purchased in quantity for premiums and promotions as well as fundraising or educational use. Special editions can also be created to specification. For details, contact specialsales@abramsbooks.com or the address below.
ABRAMS The Art of Books 195 Broadway, New York, NY 10007 abramsbooks.com

CHAPTER 1
Ada Twist woke to the smell of breakfast. She jumped out of bed and followed her nose to the kitchen, where her father was cooking eggs with onions. He was also boiling two dozen eggs for egg salad.
There you are! he said. Hugs in a second. Eggs first!
Everyone knows that chickens come first! said Ada.
Her dad laughed. It was the same joke Ada made every time her dad cooked eggs for breakfast. They were being goofy, but the age-old question still made her wonder: Which came first, the chicken or the egg
Someday, thought Ada, I ll do an experiment to find out!
Hugs come first over here! said Ada s mom, who was sitting at the table by two coffee mugs.
Ada hugged her mother. The smell of her mom s sweet perfume mingled with the bitter scent of steaming-hot coffee. The mix was one of the best smells in the world to Ada. She smiled.
My turn, said Mr. Twist, setting the bowl of eggs and onions on the table.
Ada took a step toward him but stopped suddenly. The strong, bitter aroma of coffee above her mom s mug filled her nostrils. But her dad s mug of coffee had no smell at all. Ada leaned closer and sniffed again.
Nothing.

Ada pulled out her notebook and jotted a question: Why does Mom s coffee have a smell but not Dad s
Ada s dad smiled and hugged her.
Did you already find a mystery before breakfast? he asked.
Ada grinned. Questions filled her mind as she looked at the coffee mugs. The day had just begun, and she already had a mystery to solve. As a scientist, nothing made her happier.
CHAPTER 2
Ada pulled the tape measure out of her pocket. She always kept one handy. She measured the distance from her nose to the top of her mother s coffee mug. She bent closer and closer to the mug, sniffing, measuring, and taking notes. She could smell the coffee from her mom s mug from twelve centimeters away. She repeated the steps with her dad s coffee mug. But she could not smell anything from his mug until her nose was only four centimeters away. Even then, the scent was faint.
Your coffee is broken, Dad! said Ada. It doesn t smell!
Keep investigating, said Mrs. Twist. You ll figure it out.
Ada knew that using all her senses was a great way to gather data.
Ada looked carefully at the mugs. Steam rose over her mom s mug like wispy smoke. Ada placed her right hand over the steam and her palm became damp. She placed her left hand over her dad s mug. Her left hand stayed dry.
Finally, Ada touched her mom s mug. It was hot. Her dad s mug was icy cold and a little damp.
Zowie! said Ada.
Her dad laughed and picked up his mug and took a drink.
It s iced coffee, he said. But the ice melted so it looks like the hot stuff.
And speaking of hot, said Mrs. Twist, can we eat while our eggs are still hot stuff?
While Ada ate, more questions swirled around in her mind. What makes hot coffee hot? What makes steam? Why does it go up? Why was Dad s mug damp on the outside? Why does hot coffee smell more than cold coffee? Do other things smell stronger when they are hot than when they are cold?

Every question gave her two more questions.
And each of those questions led her to four!
Just then, Ada s brother, Arthur, came into the kitchen carrying his tennis racket and his tennis shoes. As he passed Ada, a toe-curling stink whacked her right in the nose.
Zowie! thought Ada.
An idea popped into her brain. She could do an experiment!
I wonder she said, and she tapped her chin.
A look of panic crossed Arthur s face. A similar look crossed her cat, Bunsen Burner s, face. Bunsen darted out of the room. Arthur pointed at Ada.
Ada s doing that tapping thing! said Arthur, who had seen that look on her face before.
It usually led to something messy happening.
Or worse.
Hey, Arthur! Ada said eagerly. Do you want to help me do some science?
No! said Arthur. And don t use my stuff! Remember what Mom and Dad said?
Arthur loved his sister and he loved science experiments, too. But he didn t love Ada s experiments when they used his stuff. He was still getting pudding out of his Lego blocks from the time Ada tested what made things sticky. After that, his parents made rules about how Ada could conduct her experiments, but sometimes she forgot. Rule No. 1 was: Don t take Arthur s things without his permission.

Of course I remember, said Ada. I wrote it down. See?
Ada flipped open her notebook and held it up for him.

I always write down important things so I won t forget, Ada said.
Arthur frowned and plopped into a chair. As he ate his breakfast, he watched Ada warily. But Ada was too busy working to notice. She scribbled notes and grinned. She loved having a question to explore. It was a mystery! A riddle! A puzzle! A quest! This was the moment that Ada loved best.
It was science time!
CHAPTER 3
Ada spent the next two hours reading her science books. She needed to know more about air and gases and about heat and smells. Research helped her understand what scientists had already figured out. It gave her some answers to her questions and then led to other questions to explore.

AIR! What s Up with That? by Dr. Penelope H. Dee, PhD
What is air?
Air is the clear gas that surrounds the Earth. It is a mix of many other gases, dust particles, and water molecules. Most of air is nitrogen (78 ), oxygen (21 ), and other trace gases, including carbon dioxide and helium, which make up less than a tenth of 1 .
We call the air around Earth the atmosphere . Gravity pulls the atmosphere toward the center of the Earth. (That s why it doesn t just fly off into space.) Atmospheric pressure is the force of the air pushing against objects. Atmospheric pressure is highest at the Earth s surface because gravity is pulling all the air above it toward the center of the planet. (That s a lot of air!) There is less and less air as you travel from the planet s surface toward space. So there is less pressure!
It s like being in an ocean. When you float near the top of the ocean, there is only a small amount of water pushing down on you. When you swim at the bottom of the ocean, all the weight of the water between you and the ocean s surface is pushing down on you. That is much heavier!
What are gases?
Gases expand to fill the space that is available. Gases expand when they are heated, and gases shrink and become denser when they are cooled.
Gas molecules move faster when they are hot than when they are cold. Gas molecules travel until they bounce off other molecules. Then they change directions and keep traveling. Diffusion is when gas molecules continue to spread out as far as they can from the other molecules.
What are smells?
Smells are just molecules that reach the special cells in your nose. These cells are called olfactory receptor neurons. When a chemical molecule hits them, they send a message to your brain. Your brain figures out if the smell is familiar, pleasant, nasty, or has other traits.
Ada loved reading about air, molecules, and smells. But she wanted to do something.
I know , she thought. I ll try to answer one question: Does a thing smell more when it is hot than cold?
From her observations and from her research, Ada had a strong idea that she wanted to test. She had a hypothesis.
Ada s hypothesis: If Arthur has two identical shoes but one is hot and one is cold, the hot one will stink more.
Perfect , thought Ada. Let the science experiment begin. Status: Project Underway. P.U.!