An attempt to make the description of chemical reactions a mini-story. Not the best story by any means, but it was pretty well received by the students.
15. Chemical Reactions During chemical reactions atoms are not created or destroyed. They’re just rearranged. 2 oxygen atoms 4 hydrogen atoms 2 oxygen atoms 4 hydrogen atoms
16. How can you tell if a chemical reaction has happened? Let me give you some hints.
17. Is it a chemical reaction? If a gas is produced it might be a chemical reaction. Look for the bubbles!
18. Is it a chemical reaction? If it changes color it might be a chemical reaction. Like iron rusting!
19. Is it a chemical reaction? If it gets hotter it might be a chemical reaction.
20. Is it a chemical reaction? Or…if it gets colder it might be a chemical reaction.