CK-12 Foundation
Ck 12: Life Science: 4.1 Theory of Evolution
Discover how Charles Darwin developed the theory of evolution through his observations in the Galapagos Islands.
Simon Fraser University
Chem1 Virtual Textbook: The Basics on Atomic Theory
As part of the Virtual Textbook, this site examines all things related to Atomic Theory including information on atoms, molecules, formulas, equations, nomenclature, and more.
Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Modern Atomic Theory [Pdf]
The modern atomic theory chapter from "An Introduction to Chemistry", describes electrons, electron orbitals, and how to draw orbital diagrams. Many pictures and examples help to explain the information. Also find a detailed chapter...
CK-12 Foundation
Ck 12: Life Science: 4.3 Natural Selection
Explore the theory of evolution by means of natural selection.
OpenStax
Open Stax: Urbanization 1870 1900: Change Reflected in Thought and Writing
American writers and intellectuals played an important role in articulating the changes taking place in Industrial America in the late 1800s and early 1900s. Learn about some of the prominent writers, scientists, and philosophers at that...
Project Gutenberg
Project Gutenberg: The Autobiography of Charles Darwin
Resource presents multiple digital formats of this literary text. You can read about the famous scientist's life in his own words, as he recalled his thoughts and actions for his children.
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: Life Science: 4.2 Influences on Darwin
Learn about Darwin's influences that led to his discoveries of change in species over time.
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