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Across 1. the total displacement divided by the time interval during which the displacement occured 5. measured in units of radians 6. the degree of exactness of a measurement 10. a description of how close a measurement is to the correct or accepted value of the quantity measured 12. the velocity of an object at some instant or at a specific point in the the object'spath 14. a pattern, representation, or description designed to show the structure or workings of an object, system, or concept 15. the change in position of an object

Down 2. an experiment that test only one factor at a time by using a comparison of a control group with an experimental group 3. those digits in a measurement that are known with certainty plus the first digit that is uncertain 4. travled by the bulb on the ferris wheel is the change in the arc length's divided by the distance of the bulb from the axis of rotation. 5. the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change 7. a system for specifying the precise location of objects in space and time 8. a set of particles or interacting conponents considered to be a distinct physical entity for the purpose of study 9. the motion of a body when only the force due to gravity is acting on the body 11. an explanation that is based on prior scientific research or observations and that can be tested 13. a way to measure angles