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ASVAB General Science (GS) Practice Tests & Test Prep by Exam Edge - Review



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ASVAB General Science - Reviews


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Based on 100 reviews


See Why Our Users from 154 Countries Love Us!

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we are here to help you prepare for test day.



See why our users from 154 countries love us for their exam prep! Including 100 reviews for the ASVAB General Science exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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ASVAB General Science - Test Reviews Sample Questions

Modern geologists estimate the age of the Earth to be around ________ years old.

Correct Answer:
4.5 billion
4.5 billion years. modern geologists and geophysicists estimate the earth to be approximately 4.54 billion years old. this estimation is derived primarily through the technique known as radiometric age dating.

radiometric age dating is a method used to determine the age of rocks and other geological materials based on the decay rates of radioactive isotopes. these isotopes, such as uranium-238, potassium-40, and rubidium-87, decay at a predictable and constant rate into stable isotopes. by measuring the ratio of radioactive isotopes to their decay products in a rock sample, scientists can calculate the time elapsed since the rock formed.

the most compelling evidence for earth's age comes from dating meteorites that have been found on earth. meteorites are believed to have formed around the same time as the solar system, including the earth. by dating these meteorites, scientists can indirectly determine the age of earth. the oldest meteorites have been dated by using various radiometric methods to be about 4.54 billion years, which sets a lower limit for the age of earth.

in addition to meteorite dating, the ages of the oldest rocks on earth and the moon have also been measured to provide further evidence supporting the earth's age. the oldest rocks on earth, found in western greenland, have been dated to about 3.8 billion years, while moon rocks brought back by the apollo missions have been dated up to about 4.5 billion years.

the convergence of data from different sources and dating methods provides a robust estimate of earth's age. the consistent findings across diverse studies reinforce the reliability of radiometric dating techniques and offer a comprehensive picture of earth's geological history.