Across
- 1. type of reaction in one element replaces a second element in a compound
- 5. data that can be measured in numbers
- 6. the study of nonliving matter and energy
- 7. an indicator of a chemical reaction
- 13. a chemical reaction that breaks down compounds into simpler products
- 14. a negatively charged ion
- 16. data that describes color, odor, shape, or some other physical characteristics
- 18. a system of moral values
- 19. has the same number of protons and electrons
- 20. type of reaction in which two or more substances combine to form a new compound
Down
- 2. a measure of how close a series of measurements are to one another
- 3. a measure of the force of gravity on an object
- 4. a type of reaction involving the exchange of positive ions between compounds
- 8. type of bonding between two or more atoms resulting in the formation of different substances
- 9. a reaction that releases energy in the form of heat
- 10. the movement of carbon from the nonliving environment into living things and back
- 11. an atom or group of atoms that have a positive or negative charge
- 12. an initial, testable explanation that guides an investigation
- 15. a positively charged ion
- 17. how close a measurement is to the true value
- 21. decimal based measuring system