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How do geologists understand the Earth’s history? In part, they measure the age of rocks and other natural materials by dating techniques. They can date rocks by gauging the amount of decay of radioactive elements. The time necessary for half of any given amount of one element (the “parent...
Grade Level   5 6 7 8 9
Classroom Activities Curricula and Instruction
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Published in 2007
The Earth's crust is not a solid shell. It is made of thick, interconnecting pieces called tectonic plates that fit together like a puzzle. In this activity, students will: use logic and the evidence to reconstruct the position of large islands and continents as they appeared 220 million years ago;...
Grade Level   5 6 7 8 9 10 11 12
Classroom Activities Curricula and Instruction
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