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Exam 11: Geologic Time

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Exam 1: Introduction to Earth Science108 Questionsadd course
Exam 2: Matter and Minerals115 Questionsadd course
Exam 3: Rocks: Materials of the Solid Earth120 Questionsadd course
Exam 4: Plate Tectonics: a Scientific Revolution Unfolds89 Questionsadd course
Exam 5: Earthquakes and Earths Interior90 Questionsadd course
Exam 6: Volcanoes and Other Igneous Activity106 Questionsadd course
Exam 7: Crustal Deformation and Mountain Building97 Questionsadd course
Exam 8: Weathering, Soil, and Mass Movement124 Questionsadd course
Exam 9: Running Water and Groundwater134 Questionsadd course
Exam 10: Glaciers, Deserts, and Wind100 Questionsadd course
Exam 11: Geologic Time102 Questionsadd course
Exam 12: Earths Evolution Through Geologic Time129 Questionsadd course
Exam 13: The Ocean Floor92 Questionsadd course
Exam 14: Ocean Water and Ocean Life74 Questionsadd course
Exam 15: The Dynamic Ocean101 Questionsadd course
Exam 16: The Atmosphere: Composition, Structure, and Temperature85 Questionsadd course
Exam 17: Moisture, Clouds, and Precipitation101 Questionsadd course
Exam 18: Air Pressure and Wind97 Questionsadd course
Exam 19: Weather Patterns and Severe Storms96 Questionsadd course
Exam 20: World Climates and Global Climate Change105 Questionsadd course
Exam 21: Origins of Modern Astronomy101 Questionsadd course
Exam 22: Touring Our Solar System93 Questionsadd course
Exam 23: Light, Telescopes, and the Sun93 Questionsadd course
Exam 24: Beyond Our Solar System83 Questionsadd course
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For a radioactive isotope like Uranium- 235, what does the 235 indicate?

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Question 101

The decay of 40K has a half of 1.3 × 109 years. The age of Earth is estimated at 4.6 × 109 years. The decay of 40K is a major heat source for Earth's interior. Relative to today, how much more heat was produced by 40K in the early Archaeon era or 3.9 × 109 years ago?

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Question 102
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