Across
- 1. The degree to which a substance can harm living organisms.
- 5. Biscuits or chocolate bars
- 7. Glass, air, water
- 8. Has a sour taste
- 9. The resistance to decomposition or change.
- 10. Soapy to touch
Down
- 2. The ability to eat away or deteriorate other substances.
- 3. Most materials have hard surfaces
- 4. Heat and Electrical
- 6. Gold, silver, and copper can be shaped