Published on March 18, 2014
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 1 New Vocabulary oPangaea (495) – The supercontinent that all continents today were once a part of oContinental Drift (495) – A hypothesis that suggests that continents are in constant motion on the surface of Earth Pangaea oEach year, North America moves a few _____________________ farther away from Europe and closer to Asia. oNearly 100 years ago, Alfred _________________ began an important investigation to know whether Earth’s continents were fixed in their positions. o He proposed that all continents were once part of a supercontinent called ____________. o Over time Pangaea began_________________ __________________, and the continents slowly moved to their present positions. oWegener proposed the hypothesis of _____________________ drift, which suggested that continents are in constant motion on the surface of Earth.
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 2 Evidence That Continents Move oThe most obvious evidence for continental drift is that the continents appear to fit together like pieces of a __________________________. oHowever, scientists were skeptical, and Wegener needed additional evidence Apparent fit of the continents Past ____________ Data __________________ Correlation _____________ and Mountain Correlation Climate Clues
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 3 oWhen Wegener pieced Pangaea together, he proposed that South America, Africa, India, and Australia were located closer to ___________________________ 280 million years ago. oHe suggested the climate of the Southern Hemisphere was much ______________________ at the time. o Glaciers covered most of these continents oWegener studied the _______________ deposited by glaciers in South America, Africa, India, and Australia. oHe discovered ________________ _______________, or deep scratches in rocks made as the glaciers moved across the land on neighboring continents today.
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 4 Fossil Clues oAnimals and plants that lived on different continents can be ____________________ to that continent alone. o Kangaroos are exclusive to___________________ . Lions live in ________________but not S. America. o Because ____________________ separate continents, these animals cannot travel from one continent to another by natural means oHowever, _______________________of similar organisms have been found on several continents separated by oceans. oFossils of a plant called Glossopteris have been discovered in rocks from South America, ______________, India, Australia, and________________________. oEvidence suggests these plants grew in a _____________________environment. Therefore, the climate of this region, including Antarctica, was different than it is today. o Antarctica had a warm and wet climate and changed drastically from _________ milllion years earlier when glaciers existed. Rock Clues
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 5 oWegener also observed that ________________________ ranges and rock formations on different continents had common origins. Today geologists have determined that large-scale volcanic eruptions occurred on the western coast of _________________ and the eastern coast of South America at about the same time hundreds of millions of years ago o These volcanic rocks are identical in both ____________________and ___________ oThe _____________________ mountain range in northern Europe and the Appalachian Mountains in eastern N. America are similar in age, structure, and composition. oIf you place the continents ______________________, these mountains would meet and form on long, continuous mountain belt.
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 6 What is missing? oWegener continued to support the continent drift hypothesis until his death in ______________ oHis ideas were not widely accepted until nearly 4 decades later, because he could not explain how they ________________. oOne reason scientists questioned continental drift was because it is a ______________ process oIt was not possible for Wegener to measure how ________________ the continents moved o How could continents push their way through the ___________________rock of the sea floor? o However at that time, the world was only beginning to understand what the seafloor looked like. o It took many years after Wegener died before the evidence of plate tectonics hidden in the rifts on the seafloor to be discovered.
Chapter 14 Lesson 1 – The Continental Drift Hypothesis – p494-500 – page 7
Describe the hypothesis of continental drift. 2. Identify evidence supporting continental drift. ... CRB = Chapter Resources Booklet, ...
... of Continental Drift vs. Theory of Plate Tectonics Student has clearly and accurately distinguished between the hypothesis of Continental Drift and ...
14.1: Vocabulary (definitions from chapter ... What is the theory of continental drift ... What hypothesis for the origin of life ...
Chapter 2 Plate Tectonics 2.1 from ... features like continents-continental drift hypothesis was initially ... Chapter 14 groundwater 14.1 the ...
Chapter 8 (1) 134 terms by ... What was Wegener's continental drift hypothesis? ... According to figure 14-1 is the following statement TRUE or FALSE: ...
Chapter 14.1. Growing Tensions Over Slavery. Key Terms and People. Popular sovereignty Secede Fugitive Henry Clay John Calhoun Daniel Webster. Why It ...
Chapter 14 Study Guide.docx ... Chapter 14 Study ... Vocabulary Definitions Word/Term Definition Word/Term Definition Pangaea Continental Drift ...
248 Chapter 9 9.1 Continental Drift Reading Strategy ... Hypothesis Evidence a. continental puzzle b. c. d. ??? Continental Drift Figure 1 A Curious Fit This