1. Lesson Objective:
You will be able to define a chemical change AND be able to list out evidence that a chemical change has occurred.

4. Evidence:
1. Gas production. (Bubbles)

7. Evidence:
3. Formation of a precipitate.
-Precipitate = a solid.

10. Some common examples of chemical changes include…

11. -Rusting:
Water and oxygen interact with metal to form a new substance, rust!

14. During a chemical change a –
A – new substance with new properties are formed.
B – no new substance is formed. C – new substance with the same properties as before is formed.
D – nothing happens.

15. Which of the following is NOT evidence that a chemical change has occurred?
A – color change.
B – gas production.
C – temperature change.
D – change in state of matter.

16. Which of the following is an example of a chemical change?
A – Water is boiled and evaporates.
B – Sugar dissolves in water.
C - Two liquids are mixed, and a solid substance forms.
D - A piece of paper is cut into many small pieces.

17. What evidence would indicate that a new substance is produced?
A - The tablets dissolve in water.
B – The water becomes murky.
C – The water rises.
D - Bubbles are given off.