Sea Floor Spreading and Polar Reversal


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question 1 of 3

Which of the following best defines the Mid-Ocean Ridge?

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1. Which of the following best defines reversed polarity?

2. What magnetic readings are detected in stripes of the ocean floor closest to the crest of ocean ridges?

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About This Quiz & Worksheet

In the mid-twentieth century, scientists studying the ocean floor began to notice an inexplicable phenomenon occurring at the Mid-Ocean Ridge. They discovered alternating patterns of normal and reversed polarity caused by sea floor spreading. This quiz and worksheet combination will check your understanding of sea floor spreading and reversed polarity in the Mid-Ocean Ridge.

Quiz & Worksheet Goals

This quiz will test your knowledge of the following:

  • Topography of Mid-Ocean Ridge
  • Magnetic readings near the crest of ocean ridges
  • Relevance of scientific discoveries related to polarities of the ocean floor

Skills Practiced

Students using this quiz and worksheet will practice these skills:

  • Reading comprehension - ensure that you draw the most important information from the related lesson on sea floor spreading and polar reversal
  • Defining key concepts - verify that you can accurately define main phrases, such as reversed polarity
  • Knowledge application - use your knowledge to answer questions about the Mid-Ocean Ridge

Additional Learning

The accompanying lesson contains information on causes of reversed polarity at the Mid-Ocean Ridge and the significance of scientists' discoveries about this phenomenon. The lesson, together with this quiz and worksheet combination, contains the following objectives:

  • Explain how properties of the ocean's floor cause it to be magnetic
  • Describe how the discovery of alternating stripes of normal and reversed polarity helped scientists to form a hypothesis
  • Explore the role of tectonic plates in forming the Mid-Ocean Ridge