Across
- 2. and is held in place by the gravity of that
- 4. an item that is used without any change to its substance
- 9. also called "overlap joint" in which two or more pieces lay over one another (overlap)
- 10. electrical breakdown of a gas that produces a prolonged electrical discharge
- 13. action or state of making or being made impure by polluting or poisoning
- 14. lasting for only a limited period of time; not permanent.
- 15. of the atmosphere
Down
- 1. a layer of a chemical which acts as a cleaning agent
- 3. metal or metal alloy in a liquid state
- 5. the practical application of a process
- 6. greyish-white lustrous metal, which is a solid at room temperature and has the highest melting point of all metals
- 7. a substance or layer that is left, usually after liquid is removed
- 8. any material that possesses physical properties
- 11. a layer of gas or layers of gases that envelop a
- 12. chemically inactive