Across
- 2. Different elements join together to form a ___
- 4. Educated guess for what you think will happen in an experiment
- 7. Opinion based on what you already know
- 9. How many bonds does carbon have?
- 11. Group in an experiment that is not tested on
- 12. Something in an experiment that must remain the same
- 15. Fact based on your 5 senses
- 16. Variable you change in an experiment
Down
- 1. 1st step of the scientific method
- 3. Variable that changes because of what you changed
- 5. Found in the nucleus and has a positive charge
- 6. All matter is made of ___
- 8. Found outside the nucleus and has a negative charge
- 10. How many bonds does hydrogen have?
- 13. Found in the nucleus and has a neutral charge
- 14. When at least two atoms join together they form a ____