Scenario Kenneth and Catherine Lohmann of the University of North Carolina

question 24

Multiple Choice

Scenario
Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean.
-What is the variable being tested in this experiment?

• A)time of day
• B)amount of light
• C)magnetic field
• D)time of hatching

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Definitions:

Rocky Mountains

A major mountain range in western North America, extending from Canada through the United States, known for its breathtaking landscapes and diverse ecosystems.

Transcontinental Railroad

A continuous rail line that connects the east and west coasts of the United States, completed in 1869, facilitating mass migration, goods transportation, and economic development.

Homestead Act

A United States federal law enacted in 1862 that granted 160 acres of public land to settlers for a small fee, assuming they would improve the land by building a dwelling and cultivating crops.

160 Acre Parcels

A reference to the Homestead Act of 1862 in the United States, which allowed settlers to claim 160 acres of public land in exchange for cultivating it for five years.