Across
- 3. all factors that must remain the same; allows for a 'fair test'
- 5. factor that responds to the change in an experiment
- 9. ___________ have a positive charge
- 11. is anything that takes up space and has mass
- 14. ____________ change is when a substance is changed into a different substance.
- 16. _____________ observation. Data described in numbers. such as mass, height, volume, temperature, distance, time, etc
- 18. a characteristic or ability of a substance to change into a different substance.
- 19. number of protons + neutrons.
- 20. number of protons and also the number of electrons in an atom of an element.
Down
- 1. a trait of a substance that can be observed or measured without changing the substance into another substance
- 2. ____________ observation. Describes data using words based on qualities like color, odor, texture
- 4. ____________ have no charge
- 6. _____________ observation. Data described in numbers. such as mass, height, volume, temperature, distance, time, etc
- 7. made of two or more different elements chemically combined in a set ratio
- 8. created when two or more atoms join together.
- 10. ___________ have a negative charge
- 12. A substance made of one type of atom. Cannot be separated into simpler substances.
- 13. A chemical reaction that releases energy in the form of heat
- 15. A chemical reaction that absorbs energy in the form of heat
- 17. ___________ change does not change what the substance is