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CEOE Earth Science (008) Practice Tests & Test Prep by Exam Edge

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CEOE Earth Science Sample Test

1 of 5

Which of the following terms identifies the study of the history of the Earth's magnetic field?

Correct Answer:

paleomagnetism

the correct answer to the question "which of the following terms identifies the study of the history of the earth's magnetic field?" is paleomagnetism. paleomagnetism is a scientific field that examines changes in the earth’s magnetic field over time. this study is crucial for understanding not only the magnetic field itself but also the historical movements of the earth's tectonic plates and the age of rocks.

paleomagnetism works by analyzing the magnetic minerals in rocks, such as iron-bearing minerals, which can record the earth's magnetic field at the time the rocks were formed. these minerals become aligned with the earth's magnetic field when they are formed, and they preserve that alignment as they solidify. by studying the magnetic properties of these rocks, scientists can infer the direction and intensity of the earth's past magnetic fields.

other choices listed alongside paleomagnetism do not relate to the study of earth's magnetic field. permeability, for instance, refers to the ability of a material to allow fluids (like water) to pass through it, which is a concept used primarily in fields such as hydrogeology or materials science.

the photosphere is another incorrect choice as it pertains to astronomy, specifically to the outer shell of the sun from which light is emitted. it has no direct connection to the earth’s magnetic field or its historical study.

lastly, pangea is also an incorrect option. pangea was a supercontinent that existed during the late paleozoic and early mesozoic eras, forming approximately 300 million years ago and beginning to break apart around 200 million years ago. its relevance to paleomagnetism is only in the context of the evidence that the study provides in supporting the theories of continental drift and plate tectonics, but it is not itself a study of the earth's magnetic field.

therefore, paleomagnetism is the correct answer as it directly relates to the study of the historical changes in the earth's magnetic field, utilizing geological samples to reconstruct the magnetic field and its effects on earth over geological time.