7/27/2019 MCR-G3-A Trip to the Pond
1/19
Math Concept Reader
A Trip to the Pond
7/27/2019 MCR-G3-A Trip to the Pond
2/19
7/27/2019 MCR-G3-A Trip to the Pond
3/19
Copyright Gareth Stevens, Inc. All rights reserved.
Developed for Harcourt, Inc., by Gareth Stevens, Inc. This edition published by Harcourt, Inc., byagreement with Gareth Stevens, Inc. No part of this publication may be reproduced or transmittedin any form or by any means, electronic or mechanical, including photocopy, recording, or anyinformation storage and retrieval system, without permission in writing from the copyright holder.
Requests for permission to make copies of any part of the work should be addressed toPermissions Department, Gareth Stevens, Inc., 330 West Olive Street, Suite 100, Milwaukee,Wisconsin 53212. Fax: 414-332-3567.
HARCOURT and the Harcourt Logo are trademarks of Harcourt, Inc., registered in the United Statesof America and/or other jurisdictions.
Printed in the United States of America
ISBN 13: 978-0-15-360186-6ISBN 10: 0-15-360186-8
1 2 3 4 5 6 7 8 9 10 179 16 15 14 13 12 11 10 09 08 07
by Linda Bussell
Math Concept Reader
A Trip to the Pond
7/27/2019 MCR-G3-A Trip to the Pond
4/19
7/27/2019 MCR-G3-A Trip to the Pond
5/19
FIELDG
UIDE
HickoryHornedDevil
About10cmlong
Ms. Tosh holds up her eld guide or the class to see. This
eld guide is a book about insects that live near the pond, she
says. She opens the book and shows the class what it looks like
inside.
It has pictures and inormation about the insects and their
habitats. The eld guide includes measurements. It shows the
size o many insects and has inormation about the plants in
the area, too.
Ms. Tosh says students will work in pairs and use eld
guides to nd and identiy the insects.
Students will use eld guides tolearn about the insects they see ontheir eld trip.
7/27/2019 MCR-G3-A Trip to the Pond
6/19
Today is the eld trip. The students brought their
science journals to record what they see.
Ms. Tosh has eld guides as well as colored pencils so
the students can draw pictures o insects they spot.
Ms. Tosh says the students will look or colors and
markings to help them identiy the insects. Markings are
patterns o color on an animal.
They will estimate the sizes o the insects and then
compare the estimates with the sizes in the eld guide.The bus arrives at the pond. Students put on gloves
beore starting their investigations.
Chapter 2:
At the Pond
7/27/2019 MCR-G3-A Trip to the Pond
7/19
Milkweed and other wildfowers grow near the pond
and in the eld around the pond. These plants are an
important habitat or some insects. Their poisonous
sap is a source o ood or insects such as the Monarch
caterpillar. The poisonous sap does not harm the Monarch
caterpillar.
This milkweed is about 90 cm tall, which is more than
the length o an adult baseball bat!
The students notice many orange and black butterfiesfying around the milkweed.
At rst all the butterfies look the same. A ew are
dierent though. Adam and Rachel use their eld guide
to discover that there are two kinds o orange and black
butterfies.
Milkweed is a source o ood or many dierent insects.
7/27/2019 MCR-G3-A Trip to the Pond
8/19
One o the
butterfies is
called the
Monarch while
the other is called
the Viceroy.
Adam notices
that the hind
wings o the
butterfies aredierent. The
Viceroy has a
black band
there, but the
Monarch does not.
They check the eldguide. It says that
wingspan is the distance
across the widest part o
the wings when they are
ully open.
The Monarchswingspan is about 10 cm,
and the Viceroys wingspan
is about 8 cm. Rachel
records the two butterfies
and their wingspans in the journal. Then
Rachel sees something green hanging rom a milkweed stem.
Monarch butterfy
Viceroy butterfy
7/27/2019 MCR-G3-A Trip to the Pond
9/19
Adam nds a picture o the object in the eld guide
and learns that it is a Monarch chrysalis, or pupa. The
Monarch caterpillar turns into a chrysalis beore itbecomes an adult butterfy and remains in this stage or
10-12 days.
The process o changing rom a caterpillar to a pupa
to a butterfy is called metamorphosis. The chrysalis in
the eld guide measures more than 2 cm long. Rachel
estimates this chrysalis is almost the same size as the one
in the eld guide.
She notes this in their journal and then draws a
picture o the chrysalis.
A Monarch butterfy chrysalis, or pupa, is shown in dierent stages odevelopment.
7/27/2019 MCR-G3-A Trip to the Pond
10/19
Daisy and Ruben are also exploring the milkweed.
They see yellow, black, and white caterpillars o dierent
sizes. Adam reads in the eld guide that they are all
Monarch caterpillars that will grow into Monarch
butterfies.
Caterpillars grow in stages called instars. Between
instars, the caterpillars shed their skin to keep growing.
There are ve instars in all.
Daisy and Ruben nd a table in their eld guide that
compares the sizes o the Monarch instars.
Daisy and Ruben compare the caterpillars they see
with the inormation in the table. They record their
observations in their journal.
Stage Approximate Length
First Instar About cm
Second Instar Almost 1 cm
Third Instar About 1 cm to 1 cm
Fourth Instar About 1 cm to 2 cm
Fith Instar About 2 cm to 4 cm
1
2
1 2
1
2
1
2
1
21
2
Monarch butterfy instars
7/27/2019 MCR-G3-A Trip to the Pond
11/19
7/27/2019 MCR-G3-A Trip to the Pond
12/19
7/27/2019 MCR-G3-A Trip to the Pond
13/19
Hickory trees near the pond are another insect habitat and
can grow to be 40 m tall. One meter equals 100 centimeters.
Forty meters is longer than three school buses parked end to
end.Sydney spots a large, green moth on a tree trunk. It is an
adult Luna moth. This is a lucky nd because Luna moths are
an endangered species in some areas.
This Luna moth is sitting high in the tree, more than a
meter above their heads. The eld guide says that some adult
Luna moths have a wingspan o more than 11 cm.
11
Adult Luna moths can have a wingspan o more than 11 cm.
7/27/2019 MCR-G3-A Trip to the Pond
14/19
Benjamin and Carl also are looking among the hickory
trees or insects. They are trying to nd a caterpillar
called the Hickory Horned Devil which is erce-looking,
but harmless to people.They nd several Hickory Horned Devil caterpillars in
the twigs o a hickory tree. They are eating hickory leaves.
The caterpillars are dierent sizes and have orange and
black spines behind their heads.
Carl reads the eld guide. It shows a Hickory Horned
Devil that is about 10 cm long. Benjamin records theinormation in their science journal. Then he draws a
picture o this insect.
1
The Hickory Horned Devil caterpillar lookserce, but it is harmless to people.
7/27/2019 MCR-G3-A Trip to the Pond
15/19
Carl reads in the eld guide that the Hickory Horned
Devil is the caterpillar stage o the adult Regal moth. Like
the Hickory Horned Devil, the Regal moth can grow very
large. Regal moths have a wingspan up to 10 cm long.
Carl and Benjamin look around, but they do not nd
any Regal moths. This is probably because Regal moths arenocturnal, or active at night.
Then they hear Ms. Tosh call the class together. Mrs. Tosh
collects the pencils, markers, and eld guides. She collects
their gloves. The students climb on board the bus.
1
Regal moth
7/27/2019 MCR-G3-A Trip to the Pond
16/19
The students settle on the bus. They are excited about
their day and talk all at once about the dierent insects
they saw at the pond.
Ms. Tosh asks them to name some o the insects they
saw. The students talk about some o the surprising things
they learned.
We saw lots o Monarch butterfies, says Rachel. We
read that some Monarchs fy more than 4,000 km!
Correct, says Ms. Tosh. Some Monarchs migraterom southern Canada, across the United States, to central
Mexico. That is a very long trip or such small insects.
1
Chapter 3:
Going Home
7/27/2019 MCR-G3-A Trip to the Pond
17/19
7/27/2019 MCR-G3-A Trip to the Pond
18/19
7/27/2019 MCR-G3-A Trip to the Pond
19/19
Think and Respond
1. The wingspan o an adult Viceroy buttery is
about 8 cm. Is this wingspan longer or shorter than
a decimeter? Tell how you know.
2. Some milkweed plants grow to be 110 cm tall. Are
these plants taller than 1 meter or shorter than 1
meter? Tell how you know.
3. A Luna moths wingspan is 11 cm. A Monarch
caterpillar is 4 cm long. The distance between a
Regal moths two wing tips is 10 cm. Order these
measurements rom smallest to largest.
4. Would you use centimeters, meters, or kilometers
to measure the length o your classroom? Explain
your choice.
Top Related