1. It Was Here Just a Moment Ago!

2. TAKS Objective 3
Substances have chemical and physical properties.

3. TEKS Science Concepts 8.9
The student knows that substances have chemical and physical properties. The student is expected to:
(A) demonstrate that substances may react chemically to form new substances;
(C) recognize the importance of formulas and equations to express what happens in a chemical reaction; and
(D) identify that physical and chemical properties influence the development and application of everyday materials such as cooking surfaces, insulation, adhesive, and plastics.

4. Learning Objectives
1.  The student will demonstrate chemical change as evidenced by a change in color.
2.  The student will measure temperature change as the result of a chemical reaction.
3.  The student will demonstrate a chemical reaction that produces gases.
4. The student will demonstrate a chemical change that results in the formation of a precipitant.
5. The student will use models to explain chemical formulas.

5. Chemicals are only found in chem labs
MISCONCEPTIONS
True or False
Chemicals are only found in chem labs

6. Chemistry runs everyone and everything!

7. Physical and chemical changes never happen at the same
True or False
Physical and chemical changes
never happen at the same

8. Energy changes during a chemical reaction
True or False
Energy changes during a chemical reaction
always give off heat

9. Energy changes during chemical reactions can give off heat and get hotter, absorb heat and get colder, give off light, sound, and electricity, etc.

10. Background

11. Physical vs Chemical Change

12. Alter the size &/or shape
Physical Changes
Alter the size &/or shape
Cut, grind, dissolve

13. Physical Changes
Phase Changes

14. Easily changed back to original form
Physical Changes
Easily changed back to original form

15. Chemical Changes New stuff is made
Cannot change new stuff back into original form easily
Chemical composition of new substance is different from original

16. Hint- Can you turn cooked chicken back into raw chicken?
Physical or Chemical?
Hint- Can you turn cooked chicken back into raw chicken?

17. 5 Evidences of Chemical Change
Smell Change
Color Change
Energy change (hot, cold, light, sound, electricity, etc.)
Bubbles, fizzing, gas produced
Precipitate (2 clears make a cloudy)

18. Baked cupcakes smell differently than batter
#1 Smell Change
Baked cupcakes smell differently than batter

19. #2 Unexpected Color Change
Colorless methane burns blue

20. As candle was burns, it gives off heat and light
#3 Energy Change
As candle was burns, it gives off heat and light

21. Alka Seltzer in water makes carbon dioxide gas
#4 Bubbles or Fizzing
Alka Seltzer in water makes carbon dioxide gas

22. Two clear solutions make a cloudy solution
#5 Precipitate
Two clear solutions make a cloudy solution

23. Physical or Chemical? You decide. . .
How do you know?

24. Physical or Chemical? You decide. . .
How do you know?

25. Physical or Chemical? You decide. . .
How do you know?

26. ENGAGE
Balloon Gas
What happened?

27. EXPLORE Red Light – Green Light For the Rust of My Life Take a Powder
Clabbered Clumps
Witches Brew
Bubble Bubble Toil & Trouble
Fireworks (do as demo)
Milk of Magnesia

28. EXPLAIN
Every reaction we did shows evidence of chemical change- what are 5?
Please- Precipitate (2 clears make cloudy)
Excuse- Energy change (heat, light, sound, electricity)
Coughs- Color change (unexpected)
Sneezes- Smell Change
Burps- Bubbles or fizzing (gas produced)

29. ELABORATE Abracadabra Sweet Models Irreversible Consequences
Chemistry at Home
List or digital/ paper photos in PPT or poster

30. EVALUATE How many atoms of copper in 2 molecules Cu2O?
What happens to atoms in chemical reactions?
What physical properties can change in a chemical reaction?