Interest in Continental Drift Waned Until Studies of Earth's Magnetic

question 18

Multiple Choice

Interest in continental drift waned until studies of Earth's magnetic field and oceanographic research showed that ____.

• A)present-day oceans basins are old features that resulted from the breakup of Pangaea
• B)continents were constantly being pulled toward the poles by magnetic forces
• C)present-day ocean basins are not as old as continents but instead, are geologically young features that resulted from the breakup of Pangaea
• D)iron-rich continental plate material was being pulled into the ocean by Earth's magnetic field
• E)present-day ocean basins are old features that resulted from erosion of continental coastlines

---

Definitions:

Enzymes

Organic compounds which greatly accelerate the speed of almost every chemical reaction occurring inside cells.

Activation Energy

Energy that must be added to molecules to initiate a reaction.

Chemical Reactions

Processes that involve the transformation of substances by breaking and forming chemical bonds leading to new substances.

Temperature

A physical quantity expressing the subjective perceptions of hot and cold, measured by a thermometer in units of Celsius, Fahrenheit, or Kelvin.