A Cross Section of Earth Reveals a Layered Structure That

question 13

Multiple Choice

A cross section of Earth reveals a layered structure that has different thicknesses and densities. How do geologists know this?

• A)From drilling and digging down into the various layers
• B)From observing the characteristics of lava and gas issuing from volcanic vents
• C)From observing the transit times through Earth of waves generated by earthquakes
• D)From comparisons with drill cores taken by robot spacecraft on Mars and Venus

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Definitions:

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Philippine Exhibit

A display or presentation showcasing aspects of Philippine culture, history, or achievements, potentially as part of a larger exhibition or fair.

St. Louis World's Fair

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United Fruit Company

A U.S.-based corporation that was a major producer and marketer of fruit and other foods, primarily bananas, and had significant influence in Latin America.