Earth's Layers and Plate Tectonics

Early mapmakers thought continents might have moved based on their observations of:

• Magnetism
• Rock and Fossil Evidence
• Matching Coastline
• Earthquakes and Floods

Pangaea was an ancient supercontinent made up of:

• South Africa, India, Australia, and South America
• The United States, Greenland, and Europe
• Antarctica, India, and South America
• All of Earth's continents

To support his hypothesis of continental drift, Alfred Wegener did NOT use:

• Ancient Climatic Evidence
• Magnetic Field Data
• Data on Ancient Reptiles and Ferns
• Evidence from Rock Formations

Fossils of aquatic reptiles found in freshwater rocks suggested to Wegener that these reptiles

• Swam the great distances between continents
• probably did not cross the oceans
• ate Glossopteris
• Once lived in Earth's oceans

Based on observations of fossils of Glossopteris, Wegener concluded that 

• Magnetic reversals had occurred in Earth's past
• Continental rocks containing these fossils had once been joined
• Earth's continents were never joined
• Glossopteris grew only in the tropics

Coal beds in Antarctica indicated to Wegener that this continent was

• Always cold
• Inhabited by penguins
• Once located closer to the equator
• Once beneath the ocean

Based on glacial evidence he observed,  Wegener argued that

• Glaciers form near the equator
• Earth's axis of rotation had changed in the past
• Landmasses drifted away from the South Pole
• Glossopteris could not survive hot weather

Most scientists at the time rejected Wegener's hypothesis of continental drift because he

• Had collected little evidence to support his hypothesis
• Would not state his hypothesis publicly
• Insisted that Earth's axis of rotation had changed
• Couldn't explain how or why the continents moved

The age of rock on the sea floor of the Atlantic Ocean:

• Is uniform throughout
• Becomes older from left to right
• Is youngest near the mid-ocean ridge and oldest near the coastline
• Is oldest near the mid-ocean ridge and youngest near the coastline.

What theory states that Earth's crust and rigid upper mantle move in different directions and at different rates over Earth's surface?

• Seafloor spreading
• Continental Drift
• Plate Tectonics
• Polarity Theory