Vanessa Black - Sinkholes

Pogo Books let children practice
reading informational text while
introducing them to nonfiction
features such as headings, labels,
sidebars, maps, and diagrams,
as well as a table of contents,
glossary, and index. Carefully leveled text with
a strong photo match offers
early fluent readers the support
they need to succeed. Walk through the book and
point out the various nonfiction
features. Ask the student what
purpose each feature serves. Look at the glossary together.
Read and discuss the words. Discuss the childs questions.
Talk about how he or she might
find answers to those questions. Discuss the childs questions.
Talk about how he or she might
find answers to those questions.

Prompt the child to think
more. Ask: Have you ever
been somewhere a sinkhole
might occur? Pogo Books are published by Jump! 5357 Penn Avenue South Minneapolis, MN 55419 www.jumplibrary.com Copyright 2017 Jump! International copyright reserved in all countries. No part of this book may be reproduced in any form
without written permission from the publisher. Library of Congress Cataloging-in-Publication Data Names: Black, Vanessa.
Title: Sinkholes / by Vanessa Black.Description:
Minneapolis, MN: Jump!, Inc., 2016.
Series: Disaster zone Audience: Age 710. Includes index.
Identifiers: LCCN 2016029501 (print)
LCCN 2016030431 (ebook)
ISBN 9781620315651 (hard cover: alk. paper)
ISBN 9781620316054 (pbk.)
ISBN 9781624965135 (e-book)
Subjects: LCSH: SinkholesJuvenile literature.
Classification: LCC GB609.2 .B53 2016 (print)
LCC GB609.2 (ebook) | DDC 551.44/7dc23
LC record available at https://lccn.loc.gov/2016029501 Editor: Kirsten Chang
Series Designer: Anna Peterson
Book Designer: Leah Sanders
Photo Researchers: Kirsten Chang and Leah Sanders Photo Credits: Alamy, ,
;
Shutterstock, .

Printed in the United States of America at
Corporate Graphics in North Mankato, Minnesota.

Imagine you are in Florida.
Up the road, you see a house.
It tilts. The ground buckles. CHAPTER 1 Watch out! A big hole in the ground opens.
The house falls in. Its a sinkhole! CHAPTER 1 CHAPTER 1 Sinkholes are holes in the
ground. They form when water
erodes rocks and minerals
underground.

Eventually, the
underground structure cannot
hold up the earths surface.
The surface collapses. DID YOU KNOW? Sinkholes are also called
sinks, swallows, and dolines. CHAPTER 1

Most of the time, sinkholes form slowly.
A hollow in the ground forms a little
at a time. But sometimes they collapse
without warning. In towns and cities,
they can damage cars and buildings.
They can even cause deaths. CHAPTER 1 TAKE A LOOK! How do sinkholes form in nature? It rains.

Rain falls into cracks
in the bedrock .
The rain slowly wears away
the rock.
Caves form. At this time,
the ground above stays intact.
It rains more. The caves expand.
Soon, there is not enough
rock under the surface.
The ground falls. = sinkhole
= soil
= limestone bedrock
= cave
= water CHAPTER 1

CHAPTER 1 Humans cause sinkholes, too.
Mining creates empty areas
in the earth. They can collapse. Or an underground water
pipe might burst.

It causes
rocks to erode. A big space
under the ground forms.
Eventually the ground
cannot stay up. It falls. DID YOU KNOW? Sinkholes are usually round. CHAPTER 1

Sinkholes can happen underwater.
The Great Blue Hole is a large
ocean sinkhole. It is in Belize .
It is feet across (300 meters).
Thats about as long as
basketball courts! It is
feet (125 m) deep.

DID YOU KNOW? You can scuba dive in
The Great Blue Hole.
It is home to sharks
and reef fish. CHAPTER 1

CHAPTER 1 Sinkholes happen all over the world.
They mostly occur where the bedrock is
made up of rocks that dissolve easily.
For example, limestone and rocks with
a lot of salt wear away easily. Sinkholes can be small. Some are only
feet (0.6 m) across. Some are huge.
They can be 2,000 feet ( m) deep. = Karst Terrain Areas CHAPTER 1 In the United States, most reported
sinkholes occur in the South. = Karst Terrain Areas CHAPTER 1 In the United States, most reported
sinkholes occur in the South.

In one
example from 2013, Jeff Bush went
to sleep in his bed in Florida. CHAPTER 2

sinkhole Then the ground opened up. A sinkhole!
He called to his brother, but dirt and
rocks covered him. He was never found. CHAPTER 2