Across
- 3. the act of pressing together
- 5. the rubbing of one object or surface against another
- 6. a force that tends to oppose or slow down motion
- 9. something that has a pH above 7.0
- 11. the natural force of attraction exerted by the earth
- 12. a push or a pull
Down
- 1. the act of stretching
- 2. increasing speed
- 4. the symbol relating to hydrogen ion (H+) concentration. Below 7.0 is acidic and above 7.0 is alkaline
- 7. a statement showing the equality of two mathematical expressions, or a representation of a chemical reaction
- 8. a substance that causes or accelerates a chemical reaction without itself being affected
- 10. something that has a pH below 7.0