Welcome to WORLD GEOGRAPHY

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CLASS BUSINESS

• 9.10 (A) / 9.11 (B): MAP TEST• 9.10 (A) / 9.11 (B): Preview Land forms• 9.12 (A): Current Events Due• 9.12 (A) / 9.15 (B) Sketch Map of Texas• 9.16 (A) / 9.17 (B) Neighborhood Map Due• 9.18 (A) / 9.19 (B) Reading Quiz.2 (Ch.2

Section1 & 2)

MAP TEST

• Instructions: Review each numbered area on the test.

• Pay attention to what each blank provides. • Check your spelling and review your answer

choices carefully. • You will have approximately 30 Minutes

MAP TEST

http://www.online-stopwatch.com/rocket-timer/full-screen

1.5 LANDFORMS PREVIEWGeography Lesson: What is a Volcano?

• Watch: http://www.youtube.com/watch?v=WgktM2luLok

• Why Are Volcano’s important for life?• They are a type of landform that has shaped

the planet through out it’s history.

1.5 DISCOVERY

Biosphere combines the major planetary sphere’s to create and sustain all life

1.5 DISCOVERY

• Landform Formation• Internal, or Primary forces shape the earth’s

surface by building mountains, hills, plains, and plateaus.

1.5 DISCOVERYInternal or Primary Forces

• Plate Tectonics is the theory that the earth’s crust is broken into plates.

• Most tectonic activity occurs between these plates, or faults.

• Tectonic activity includes earthquakes and volcanoes.

• The continents are on the larger plates, with smaller plates between the larger ones.

• There are three different kinds of plate movement: Convergent / Divergent / Transform

• Watch:http://www.youtube.com/watch?v=mB2pzhWUaiU

1.5 DISCOVERYInternal or Primary Forces

The Pacific Ring of Fire is the most active of the plates.

1.5 PROCESSINGInternal or Primary Forces

Complete Chart Using your textbook on pg. 38-39 Divergent Faults Convergent

Subduction Faults

Convergent Collision Faults

Transform Faults

What Happens?

What Types of Landforms are

Created?

CLASS BUSINESS

• 9.18 (A) / 9.19 (B) / Reading Quiz.Ch-2• 9.25 (B) / 9.26 (A) / Reading Quiz.Ch-3• 9.30 (A) / 10.01 (B) / UNIT.1 Exam• 9.19 (B) / Current Events Due• 9.26 (A) / Current Event Due

1.6 DISCOVERY

CONTINENTAL DRIFT THEORY• Continental Drift is the theory that the continents have

changed position and location over geologic time.

1.6 DISCOVERYCONTINENTAL DRIFT THEORY

• BACKGROUND• Although the "continental drift" hypothesis was proposed by

a German meteorologist named Alfred Wegener in 1910, he was not the first to notice that the coasts of Africa and South America seem to fit together. But Wegener, working mostly in the Southern Hemisphere, found other geologic evidence that convinced him that Africa and South America had at one time been joined together.

• The purpose of today's lecture is to learn how circumstantial evidence can be used to support a scientific hypothesis and why this type of evidence, by itself, is sometimes not enough to convince the scientific community of a new idea.

1.6 DISCOVERY

CONTINENTAL DRIFT THEORY• HYPOTHESIS• Based on an apparent fit between Africa and South America,

Wegener hypothesized that at one time all continents were joined together in a "supercontinent" called Pangaea. The supercontinent eventually broke into the smaller continents, which then "drifted" towards their present positions.

• Wegener supported his hypothesis by using circumstantial evidence, similar to the way that a detective would collect evidence to solve a crime. There are four lines of evidence:

1.6 DISCOVERY

CONTINENTAL DRIFT THEORY

1. ROCK DISTRIBUTIONS

2. MOUNTAIN RANGES

3. FOSSIL DISTRIBUTIONS

4. EVIDENCE OF GLACIATION

• In addition to circumstantial evidence, geodetic surveys also appeared to directly support Wegener's hypothesis.

1.6 DISCOVERY

CONTINENTAL DRIFT THEORY• RESPONSE• Most geologists, especially those in North America, rejected

Wegener's hypothesis. One reason for their skepticism was the difficulty one encountered in attempting to "fit" continents of the Northern Hemisphere back together. But their biggest objection was to the mechanism Wegener proposed for how the continents had "drifted"!

1.6 DISCOVERY

CONTINENTAL DRIFT THEORY• Continental Drift:• Video.1: http://www.youtube.com/watch?v=zocutif0cQY • Video.2: http://www.youtube.com/watch?v=hSdlQ8x7cuk• What did you learn?

1.6 PROCESSINGCONTINENTAL DRIFT THEORY

• Prompt: How have geologist’s proven Dr. Wegner’s hypothesis that the continents were once joined together?

• Write an in-class essay proving Continental Drift.

• Use the layout provided and see the attached rubric.