Vocabulary

2. An air deflector mounted usually at the rear of an automobile to reduce lift at high speeds
5. An instrument for copying a plane figure to a desired scale, consisting of styluses for tracing and copying mounted on four jointed rods in the form of a parallelogram with extended sides.
8. A flaky deposit left in containers such as kettles by the action of heat on water containing calcium salts
9. A slight puncture made by or as if by a pin.
12. A scientist who studies volcanoes and volcanic phenomena.
14. a swinging lever, weighted at the lower end, for regulating the speed of a clock mechanism
15. Completely confused or disordered

1. A separate streamlined enclosure on an aircraft for sheltering the crew or cargo or housing an engine.
3. Run by or using compressed air
4. Providing information or stimulation for a number of senses, not only sight and sound
5. A salt or ester of phosphoric acid
6. Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.
7. A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.
10. A hard, white, translucent ceramic made by firing a pure clay and then glazing it with variously colored fusible materials; china.
11. A thin plastic or metal woven mesh
13. A lustrous, hard, steel-gray metallic element, resistant to tarnish and corrosion and found primarily in chromite