1. Do Now Watch the following video and write down: 3 physical changes
3 chemical changes

2. Physical and Chemical Changes

3. Physical Changes
A change that occurs when a substance changes its appearance but does not change its chemical composition 3

4. Chemical changes or chemical reactions
Chemical changes produce new chemicals with new properties. 4

5. What are signs that a chemical change has occurred?
bubbles forming
temperature change
color change
light production
Smoke
Gives off heat
A chemical change occurs when fireworks are burned. Fireworks are made of metals such as magnesium and copper. These change chemically as they light up the sky.

6. Changing states of matter
Endothermic reaction:
A reaction accompanied by or requiring the absorption of heat
FEELS COLD

7. Changing states of matter
Exothermic reaction – a reaction accompanied by the release of heat
FEELS HOT

8. ___ melting ___ cutting hair ___ water evaporating
___ dissolving ___ fruit spoiling ___ painting a picture
___ burning ___ separating water into oxygen and
hydrogen P P P P C P C C

9. How could eating an apple and your body digesting it be classified as both a chemical change and a physical change?

10. What is it?

11. Is it a chemical or physical change?
Sugar dissolving in tea
Breaking water up by separating it into hydrogen and oxygen

12. Is it a chemical or physical change?
Cutting paper
Burning a paper
Crushing an aspirin

13. Is it a chemical or physical change?
Metal rusting
An egg rotting
A fried egg

14. Is it a chemical or physical change?
Lighter fluid burning

15. Which is it?
element, compound or mixture