Across
- 4. thing that is composed of two or more separate elements
- 6. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 7. (of a liquid) be turned into ice or another solid as a result of extreme cold
- 9. becoming liquefied by heat.
- 11. the scientific study of the properties and behavior of matter.
- 14. the smallest structural and functional unit of an organism
- 15. a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape
- 18. a species of atoms that have a given number of protons in their nucleus
- 19. the amount of space that a substance or object occupies
- 20. a dimensionless quantity representing the amount of matter in a particle or object
Down
- 1. a substance that flows freely but is of constant volume
- 2. physical substance in general, as distinct from mind and spirit
- 3. a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain
- 5. a colorless, odorless reactive gas
- 8. a part or aspect of something abstract, especially one that is essential or characteristic
- 10. a thing that represents or stands for something else
- 12. firm and stable in shape; not liquid or fluid.
- 13. the central and most important part of an object
- 16. the smallest unit of ordinary matter that forms a chemical element
- 17. a stable subatomic particle, symbol p , H⁺, or ¹H⁺ with a positive electric charge