![Story Behind the Science: Just How Old Is Earth? [Pdf] Article](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Story Behind the Science: Just How Old Is Earth? [Pdf] Article")
Story Behind the Science
Story Behind the Science: Just How Old Is Earth? [Pdf]
Article describing efforts in the 19th and 20th centuries to determine the Earth's age, particularly using naturally occurring radioactivity. It notes that scientific disciplines frequently overlap in the work they do. Questions are...
Estrella Mountain Community College
Online Biology Book: The Nature of Science and Biology
Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.
CK-12 Foundation
Ck 12: Biology: Evolution of Life
[Free Registration/Login may be required to access all resource tools.] Covers the evolution of life.
CK-12 Foundation
Ck 12: Earth Science: Age of Earth
[Free Registration/Login may be required to access all resource tools.] How scientists have been able to determine the age of the Earth.
CK-12 Foundation
Ck 12: Earth Science: Age of Earth
[Free Registration/Login may be required to access all resource tools.] How scientists have been able to determine the age of Earth.
CK-12 Foundation
Ck 12: Life Science: Timeline of Evolution
[Free Registration/Login may be required to access all resource tools.] For life to evolve from simple single-celled organisms to many millions of species of prokaryotic species to simple eukaryotic species to all the protists, fungi,...
Extreme Science
Extreme Science: How Old Is the Earth?
We say Earth is 4.6 billion years old, but how do we know? How do we measure its age? This article focuses on these questions and how long life has been on Earth.
CK-12 Foundation
Ck 12: Earth Science: Age of Earth Study Guide
A quick review of the age of the Earth.