Chapter 10 Plate Tectonics

The thin outer shell of Earth that is broken into several blocks

• lithosphere
• paleomagnetism
• transform boundary
• asthenosphere
• continental drift

Boundary that forms where two plates collide

• convergent boundary
• paleomagnetism
• transform boundary
• asthenosphere
• continental drift

Process by which new sea floor forms as magma rises through a rift

• sea-floor spreading
• paleomagnetism
• transform boundary
• asthenosphere
• continental drift

Hypothesis that the continents moved to their present positions

• continental drift
• paleomagnetism
• transform boundary
• asthenosphere
• sea-floor spreading

Study of alignment of magnetic minerals in rock

• paleomagnetism
• transform boundary
• asthenosphere
• continental drift
• sea-floor spreading

Boundary where two plates slide past one another horizontally

• transform boundary
• paleomagnetism
• asthenosphere
• continental drift
• sea-floor spreading

Layer of plastic rock just below the lithosphere

• asthenosphere
• paleomagnetism
• transform boundary
• continental drift
• sea-floor spreading

Boundary at which two plates move away from each other.

• divergent boundary
• paleomagnetism
• transform boundary
• asthenosphere
• continental drift

According to Wegener, what happened more than 200 million years ago during the Mesozoic Era?

• The South America and Nazca plates collided.
• The supercontinent began breaking into smaller continents.
• Magma rose to Earth’s surface and solidified.
• The continents drifted to their present locations.

Which of the following was NOT a piece of evidence Wegener found to support his hypothesis?

• debris from glaciers in southern Africa
• mountains of similar age in North America and Scotland
• tracks of continents plowing through ocean floor rock
• identical Mesosaurus fossils in South America and Africa