Across
- 3. a reaction or behaviour whose reason is innate, not a result of thinking
- 4. (physics) the universal force of attraction between any pair of objects with
- 6. (biology) the part of a cell that contains most of the genetic information
- 7. related to an atom or atoms
- 9. a feature or quality of something
- 11. (physics) any of the smallest units that energy or matter consists of, such as
Down
- 1. field
- 2. mass by its volume
- 5. (physics) the degree to which a substance is compacted, measured by dividing
- 8. a linking force that holds atoms or ions together in any molecule or crystal
- 10. atoms, molecules, etc.
- 12. the physical property in matter that causes it to experience a force in an