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PREVIEW 35

252 Lesson 35 © Teachers’ Curriculum Institute

Antarctica is a place of unique and extreme characteristics. But just howunique and extreme? Read each statement below. Circle whether youbelieve each one is a fact or an exaggeration.

• The ice sheets that cover Antarctica average one and a half miles inthickness. The thickest ice is almost three miles thick.

Fact Exaggeration

• If Antarctica’s ice sheets melted, the world’s oceans would rise by 200 feet.

Fact Exaggeration

• Most of Antarctica is a desert. The annual precipitation over Antarcticais less than 2 inches.

Fact Exaggeration

• From November to February, it almost never gets dark in Antarctica. Fact Exaggeration

• Antarctica’s largest land predator is a mite. It weighs about the same as two grains of table salt.

Fact Exaggeration

• The lowest temperature ever recorded on Earth, –128°F, was in Antarctica.

Fact Exaggeration

• At the beginning of winter, the Antarctic Sea freezes by around 40,000 square miles per day, eventually doubling the size ofAntarctica.

Fact Exaggeration

• In 2000, an iceberg broke free from Antarctica. It measured 183 miles long and 23 miles wide—approximately the size of the state of Connecticut.

Fact Exaggeration

Read Sections 35.1 and 35.2. Then create an illustrated dictionary of the Geoterms by completing these tasks:

• Create a symbol or an illustration to represent each term.

• Write a definition of each term in your own words.

• Write a sentence that includes the term and the word Antarctica.

GEOTERMS 35

© Teachers’ Curriculum Institute Antarctica: Researching Global Warming at the Coldest Place on Earth 253

Geoterm and Symbol Definition Sentence

biome

global warming

greenhouse effect

ice shelf

READING NOTES 35


35.3 The Theory of Global WarmingWhat three key ideas is the theory of global warming based on? 1.

2.

3.

Fill in the five missing pieces on the diagram of the greenhouse effect.

In the first column of the table, list a reason to support each of the three key ideas of the global warming theory. In the second column, list a reason to doubt each key idea. GA_ISN_35_GRN-03_rv1

B/W2nd Proof10-24-2005

Earth’s surface

from the sun passes through Earth’s atmosphere.

Earth’s surface absorbs most of the energy from the sun and is warmed by it.

Earth’s surface gives

form of

Some of the infrared radiation passes through the

keep it trapped in Earth’satmosphere.

35.4 Support for the Global Warming Theory

35.5 Doubts About the Global Warming Theory

.

.

READING NOTES 35


Follow the directions at Amundsen-Scott Station to complete the ReadingNotes below.

35.6 Studying Temperatures in AntarcticaComplete the temperature graph for Amundsen-Scott Station.

I think the information above (supports, casts doubt on, or both)the theory of global warming because

In the first column, write arguments that a supporter of the global warmingtheory might make. In the second column, write arguments that a doubterof the theory might make.

(circle one)

GA_ISN_35-1d_rv1

2nd Proof10-24-2005

–23

–22

–21

–20

–19

–18

–17

1960 1970 1980 1990 2000

Halley Station

Tem

pera

ture

(°F)

Year

GA_ISN_35-1b_rv1

2nd Proof10-24-2005

–15

–14

–13

–12

–11

–10

–9

1960 1970 1980 1990 2000

Davis Station

Tem

pera

ture

(°F)

Year

GA_ISN_35-1c_rv1

2nd Proof10-24-2005

–8

–7

–6

–5

–4

–3

–2

1960 1970 1980 1990 2000

Faraday/Vernadsky Station

Tem

pera

ture

(°F)

Year0 1,000 kilometers

0 1,000 miles

Lambert Azimuthal Equal-Area projection500

500

PACIFIC OCEAN

INDIAN OCEANATLANTIC OCEAN

ANTARCTICA

Amundsen-Scott

HalleyFaraday/ Vernadsky

Davis

Research Stations in Antarctica

Geographer Who Supports the Theory of Global Warming

Geographer Who Doubts the Theory of Global Warming

GA_ISN_35_RN-1aB/W1st Proof10-10-2005

–54

–53

–52

–51

–50

–49

–48

1960 1970 1980 1990 2000

Amundsen-Scott Station

Tem

pera

ture

(°F)

Year

Sour

ce:B

riti

sh A

ntar

ctic

Sur

vey:

Nat

ural

Env

iron

men

t R

esou

rce

Cou

ncil

,ww

w.a

ntar

ctic

a.ac

.uk/

.

READING NOTES 35


Follow the directions at Rothera Station to complete the Reading Notes below.

35.7 Studying Ice Shelves in AntarcticaCalculate how much ice was lost from the Larsen Ice Shelf in 2002 byfilling in the blanks below.

Larsen Ice Shelf, January 31, 2002

Larsen Ice Shelf, March 5, 2002




A. Total area of Larsen Ice Shelf on January 31, 2002: 2,749 square miles

B. x 100 square miles = square miles

+

C. x 50 square miles = square miles

D. Total area of ice lost between January 31 and March 5, 2002: square miles (Add the answers to B and C.)

E. Percentage of ice lost between January 31 and March 5, 2002: %(Divide the answer to D by the answer to A. Multiply the result by 100 to turn the decimal into a percent.)

I think the information above (supports, casts doubt on, or both) the theory of global warming because

(circle one)

(number of fullycolored squares)

(number of partiallycolored squares)

READING NOTES 35


Follow the directions at Palmer Station to complete the Reading Notes below.

35.8 Studying Penguins in Antarctica

Calculate the change in the number of breeding pairs of Adelie penguins by filling in the blanks below.

A. Total number of breeding pairs, 1975: 16,000

B. Number of breeding pairs in your colony, present:

C. Number of breeding pairs in other colonies, present: 4,960

D. Total number of breeding pairs, present: (Add the answers to B and C.)

E. Total change in the number of breeding pairs: (Subtract the answer to A from the answer to D.)

F. Percent change in the number of breeding pairs: % (Divide the answer to E by the answer to A. Multiply the result by 100 to turn the decimal into a percent.)

I think the information above (supports, casts doubt on, or both) the theory of global warming because

(circle one)




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