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Across 1. The measure of the disturbution of force over a given area . 4. The speed that a fluid moves in a certian amount of time . 5. Relating to systems involving fluids that move . 8. It's used to protect the piston under fluid pressure . 10. The ease in which a substance reduces it's volume under external force . 13. The amount of matter in an object, typically measured in mg, g, or kg .

Down 1. A theroy that is used to explain matter and heat transfer . 2. A force that acts to make a body slower through liquid . 3. The measured space that is taken up by matter . 5. A technique used to measure the volume of small irregular solids . 6. The measure of the force of gravity pulling on an object ( measured in nutons ) 7. The physical property of a liquid that limits it's ability to flow . 9. The thing that is used to measure the density of a liquid . 11. a cylinder or disk inside a larger cylinder that moves under the preasure of fluids. 12. Any substance that is used as a weight and alters buoyancy .