Determination of intrusive and extrusive igneous rocks.
Reviews the difference between intrusive and extrusive igneous rocks.
Learn new vocabulary words and help remember them by coming up with your own sentences with the new words using a Stop and Jot table.
The geology of Gettysburg influenced the outcome of battles during the Battle of Gettysburg. The boulders of Devil's Den were good hiding places.
Obsidian is hard and sharp. Humans used obsidian to make sharp and sturdy tools.