John Wood - Bacteria in Our World

Published in 2020 by KidHaven Publishing, an Imprint ofGreenhaven Publishing, LLC 353 3rd Avenue Suite 255 New York, NY 10010 2020 Booklife Publishing This edition is published by arrangement with Booklife Publishing All rights reserved. No part of this book may be reproduced in any form without permission in writing from the publisher, except by a reviewer. Edited by: Kirsty Holmes Designed by: Amy Li Cataloging-in-Publication Data Names: Wood, John. Title: Bacteria in our world / John Wood. Description: New York: KidHaven Publishing, 2020. | Series: Under the microscope | Includes glossary and index.

Identifiers: ISBN 9781534533134 (pbk.) | ISBN 9781534533158 (library bound) | ISBN 9781534533141 (6 pack) | ISBN 9781534533165 (ebook) Subjects: LCSH: Bacteria--Juvenile literature. Classification: LCC QR74.8 W663 2020 | DDC 579.3--dc23 Printed in the United States of America CPSIA compliance information: Batch #BW20KL: For further information contact Greenhaven Publishing LLC, New York, New York at 1-844-317-7404. Please visit our website, www.greenhavenpublishing.com. For a free color catalog of all our high-quality books, call toll free 1-844-317-7404 or fax 1-844-317-7405. PHOTO CREDITS All images courtesy of Shutterstock. With thanks to Getty Images, Thinkstock Photo, and iStockphoto.

Front Cover Carlos E. Santa Maria, givaga, FARBAI, Grigovan, Lertwit Sasipreyajun, Kateryna Kon, AndriySchevchuk, Master Images FARBAI (Germima), givaga, FabrikaSimf (title and label masking tape), andy0man (paper texture), science_photo (petri dish borders) ff-photo. CONTENTS Words that look like THIS can be found in the glossary on page 24. WHAT ARE BACTERIA? Every living thing is made up of cells. Cells are like tiny building blocks. Bacteria (singular: bacterium) are living things that are made up of one cell. Bacteria (singular: bacterium) are living things that are made up of one cell.

Bacteria are found everywhere in the world, from the bottom of the ocean to inside your own body. WHAT IS A MICROSCOPE? use very powerful microscopes, like the one in the picture below. COMPUTER KEYBOARD Some types of bacteria are harmful. This means people can get ill if too many bad bacteria get inside their body. There are many everyday objects that have a lot more bacteria on them than you might think. Let's turn the page and look under the microscope! Bacteria are much smaller and simpler than the cells that make up animals and plants. Let's turn the page and look under the microscope! Bacteria are much smaller and simpler than the cells that make up animals and plants.

The jellylike insides of the cell are usually protected by a cell wall on the outside. The bacterium under the microscope on page 10 is rod-shaped. However, bacteria can come in all sorts of shapes. They are commonly shaped like balls, rods, or spirals. BACTERIA CAN CAUSE ILLNESSES SUCH AS PNEUMONIA (SAY: NEW-MOWN-YAH ). APPLE Bacteria need four things to help them grow.

They need warmth, water, time, and . Nutrients are found in living things and throughout nature. Food can be an especially nice place for bacteria to grow. For example, an apple contains lots of moisture and nutrients. In a warm enough room, the bacteria will grow quickly. LET'S TURN THE PAGE AND LOOK UNDER THE MICROSCOPE! When bacteria have all the things that they need, they start to make more bacteria.

A bacteria cell does this by splitting in two! Many bacteria split in the middle. This creates two cells that are exactly the same. Sometimes the new cell grows from one end. This can create two cells that are slightly different from each other. INSIDE THE HUMAN BODY Some bacteria live inside your body, in places such as the intestine (say: in-tess-tin). The bacteria in your intestine help you break down food. The bacteria in your intestine help you break down food.

These are called good bacteria. Without bacteria, humans wouldnt be able to survive. LET'S TURN THE PAGE AND LOOK UNDER THE MICROSCOPE! This is E. coli. There is lots of E. coli found in the intestine.

Most types are good, and are found in many animals, especially humans. can make someone very sick. DEEP IN THE OCEAN Scientists think that some of the first living things on Earth were a type of bacteria. Over billions of years, some living things changed and became more .