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Handout
Science Struck

Science Struck: How Does an Ancient and Modern Catapult Work

For Students 4th - 8th
A short explanation of how a catapult works and some examples of them.
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Graphic
Curated OER

Educational Technology Clearinghouse: Clip Art Etc: Ballista

For Students 9th - 10th
The Ballista is a device for throwing large darts very accurately. The Roman Ballistas threw stones instead of darts.