Chemical vs physical change

3. changing a liquid to a gas all throughout the liquid
5. When an atom bumps into another atom, sometimes a chemical reaction takes place
6. one evidence of a chemical reaction is the release of _________
7. when particles move around each other
11. when particles move around in all direction
13. there of seven pieces of this, that shows a chemical reaction has taken place. Some can be misleading
14. the smallest form of matter. Could be atom, molecule, or ion.
15. when a compound breaks down or its atoms rearrange
16. the state change of a liquid to a gas at the surface
17. one of the least reactive metals. That's why it is so precious.
18. this type of change is when the same chemical composition exists
20. when two or more pure substances are combined with no chemical reaction
21. when a solid turns directly into a gas (dry ice)

1. when a solid is formed from a liquid
2. when a solid _______ into a liquid to form a solution (like saltwater)
4. an example of this is frost on a cold morning, a gas goes straight to a solid
5. the melting point of this metal is 842 C
8. the state change you see in a steam room
9. the measurement of average kinetic energy
10. when a solid turns to a liquid
12. this type of change shows a different kind of compound formed
19. when particles are very close to each other