®
Level C
Vol. 24, No. 3
DID YOU KNOW??
Global Warming
Sea ice is like a
refrigerator. It keeps the
nor thern oceans cold.
Land ice is fresh water ice found in
glaciers. Glaciers (gla-ciers) are frozen
rivers of fresh water ice.
Sea ice is made from frozen seawater.
Sea ice is found in the Arctic Circle and
the Antarctic continent (Ant-arc-tic
con-ti-nent) called Antarctica (Ant-arc-ti-ca).
A continent is a large body of land.
The Arctic Circle is an invisible
(in-vis-i-ble) circle at the top of the world.
It is made up of sea ice, seawater, and
some land! The North Pole lies in the
Arctic Circle.
The South Pole is located in Antarctica.
Antarctica is covered in land ice
and snow.
North Pole
glacier
Global Warming
NOW??
DID YOU K
ldest,
is the co
Antarctica and driest
windiest
on Earth.
continent
South Pole
Antarctic continent (Antarctica)
Meteorologists (me-te-o-rol-o-gists)
are scientists who study the weather.
For many years, Earth’s temperature
(tem-per-a-ture) has been getting
warmer. The sun’s heat can be trapped
in Earth’s atmosphere (at-mo-sphere).
The atmosphere acts like a big blanket
of mixed gases. It traps heat that
causes global (glo-bal), or worldwide,
warming. More ice is melting. Summers
and winters may get warmer. Earth may
be heating up too fast. Why do you
think global warming is important?
C-1
Vocabulary
I C E B E R _________ S
Fill in the missing letters to
complete the hidden word.
What is
global
warming
melting?
M E _________ T I N G
W E _________ T H E R
A N T A R _________ T I C
C O N T _________ N E N T
H _________ A T
The hidden word is:
What does this word mean?
E N E _________ G Y
_________ N O W
Adult Supervision Recommended
Weekly Lab
Science says…
Make a Blubber Mitten – Scientists study animals
Blubber helps keep
in the Arctic Circle and Antarctica. Many animals have
animals
warm in cold
blubber (blub-ber). Blubber is a thick layer of fat.
temperatures.
You need: shortening, 2 zip-close plastic quart-size bags,
bowl of ice water with ice cubes, thermometer,
thermometer
spoon, clock or watch, paper or notebook, pencil
1
Step 1: Place the thermometer in the ice water bowl.
Measure the temperature. notebook
ice water
Write the temperature down. pencil
ice
Step 2: Use a spoon to half-fill one plastic
shortening
bag with shortening. Zip the bag closed.
Step 3: Place your hand in a second plastic bag.
Step 4: Open the shortening bag. Place your bagged
hand inside the shortening-filled bag. Mold
zip-close
the shortening “mitten” around your hand.
bags
Step 5: Place your free hand and the shortening
“mitten” hand in the ice water. Try to
keep both hands in for 20 seconds.
Which hand is cold?
shortening
“blubber”
How cold does your hand feel inside the
mitten
“blubber” mitten? What does the blubber do?
watch
2
3
4
5
SCIENCE WEEKLY, Level C (ISSN 8756-1778), September 21, 2007 is published monthly in August, November, December, February, April and May; and, twice-monthly in September,
October, January and March. Copyright © 2007 (Level C) CAM Publishing Group., Inc., 2141 Industrial Pkwy., Suite 202, Silver Spring, MD 20904-7824 U.S.A. (301) 680-8804 (800)
4-WEEKLY. Classroom subscription rate: (minimum 20 subscriptions to same address): $4.95 per student, per school year. Individual rate for orders less than 20 subscriptions: $19.95
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Weekly, Level C, P.O. Box 70638, Chevy Chase, MD 20813-0638. Visit our web site at www.scienceweekly.com.
C-2
Math
Scientists measure melting glaciers. In Austria, the Pasterze (Pas-ter-ze)
Glacier is 8,000 meters long. For 106 years, it has melted 15 meters
each year. One meter equals about 3 feet.*
2002
2003
2004
2005
2006
1. In five years, 2. In 2003, the glacier melted 3. How many feet 4. How many meters
how many
two times the 15 meters.
did the glacier
will melt in 10
meters have
How many meters did it
melt in 2003?
years?
melted?
melt in 2003?
meters
meters
feet
meters
* Meter Stick 39.4 inches
( or 1 meter)
Yard Stick 36 inches ( or 3 feet)
Writing in Science
In your WEEKLY LAB, you learned
about blubber. Which animals have
blubber? Which animals have thick
fur? What will happen if the air and
water temperature becomes
warmer? Would blubber help or
hurt the animals? Write your
ideas below.
DISTINGUISHED
ACHIEVEMENT
AWARD WINNER
DID YOU KNO
W??
The Goldenrod
Gall
larva freezes un Fly
til
temperatures
warm up.
It is a tr ue “bug
sicle!”
arctic
fox
walruses
leopard seal
Published by CAM Publishing Group, Inc., Silver Spring, MD • Publisher / Editor, DR. CLAUDE MAYBERRY, JR. •
• Associate Editor, DR. LAURA GEHL • Writer, LISA P. HILL • Artist, LINDA KING • Graphic Design and Production, LINDA KING •
• Materials in this issue may not be reproduced in whole or in part in any form without special permission from the publisher.
C-3
Challenge
Saving energy and water may help slow down global warming.
What can you do to save energy and water? Answer yes or no.
Saves Energy? (yes or no)
1. Eat more pizza.
2. Turn off water while brushing your teeth.
3. Ride your bike to the library.
4. Recycle plastic bags.
5. Hop on one foot.
6. Turn off lights.
7. Take short showers.
8. Plant trees at home and in parks.
Where in the World?
Look at the world map. Where
are the glaciers located?
Write down the glacier
names and locations.
1
2
3
Pasterze Glacier – Austria
Sheldon Glacier – Antarctica
Grímsvötn Glacier – Iceland
Kolka Glacier – Republic of Georgia/Russia
Glacier Name
Location
4
DID YOU KNOW??
seawater.
Sea ice is frozen
m melting
fro
e
m
Icebergs co
are huge
s
glaciers. Iceberg
water.
n
ze
fro
of
chunks
1.
2.
DID YOU KNOW??
Polar bears and se
als live
on sea ice. Without
sea ice,
polar bears and se
als will
not have a home.
3.
4.
“How do birds fly?”
“Maybe they fly the same way airplanes fly.”
“You will find out in our next issue!”
C-4