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Core Knowledge Foundation
The History of the Earth Tell It Again!™ Read-Aloud Anthology
A read-aloud anthology focuses on Earth's history. Over three weeks, young scholars listen to and discuss stories about the layers of the Earth, minerals, fossils, different kinds of rocks, and dinosaurs. After the lesson's text, each...
CK-12 Foundation
CK-12 Earth Science Concepts for Middle School
Explore a variety of science concepts in an interactive textbook created for middle school scholars. A lengthy table of contents takes readers to pages comprised of a subject overview, outline, and summary. Follow links further to find...
National Institute of Open Schooling
Occurrence and Extraction of Metals
Steel is a man-made alloy or a mixture of metals. Lesson 18 in this series of 36 focuses on metals and their extraction from Earth. Individuals read about, discuss, and answer questions after learning how people find most metals, the...