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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

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Answer:

Variable being tested: The direction taken by the hatchlings under different magnetic fields.

Explanation:

The independent and the dependent variables are the two principal factors needed in an experiment.  

  • Independent variable: Refers to all the variables in an experiment that provoke a response in another variable. The independent variable changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter.  
  • Dependent variable: Refers to the variable that reacts to the changes produced in the independent variable. Depending on how the independent variable is modified, the dependent variable change. It is usually identified by the letter Y.

In the exposed example, we know that

Goal: To explore the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions.

Experiment:

The hatchlings were placed in water tanks in the laboratory, under dark conditions and during the night.

  • Tanks in a natural magnetic field  
  • Tanks in a reversed magnetic field ⇒ north and south were flipped

Observations were done about the swimming direction of the hatchlings

Variable being tested: The direction taken by the hatchlings under different magnetic fields.

In this experiment, the independent variable is the magnetic field conditions. The alternative conditions -how this variable is modified- are the Natural magnetic field and Reversed magnetic field. Researchers are no interested in the magnetic field, they are interested in analyzing how the change in the magnetic field affects the turtles´ orientation. Then, we can assume that the dependent variable is the direction taken by the turtles. It depends on the change in the magnetic field. Researchers are interested in testing how the change in the magnetic field affects the orientation of the turtles. This is the variable being tested in the experiment.

Orientation abilities of loggerhead sea turtle.

Kenneth nd catherine are working on a university project to the find out the orientation or the direction finding abilities of the logger head sea turtle as their hatchlings lay indifferent magnetic conditions. They are placed in differences environments. They are also kept in revere magnetic fields.

Thus answer is based on the magnetic field.

  • As per the exploration and findings the abilities of the sea turtle were carried out in the dark night and since they migrate to their nest in the ocean
  • the variables such as Independent Variable was  analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter.  
  • The dependent variable showed the changes that took place due to the changes in the independent variable and these were related to the use  of light, distance and navigational direction.
  • Hence the option is A magnetic field.

Learn more about the Kenneth and Catherine.

brainly.com/question/14847068.

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