1. Unit 1- Mass and Change Notes

2. What could we have measured?

3. Mass
What is mass? How can it be measured?

4. Unit 1- Mass and Change Lab

5. Mass and Change Lab
Goal- What happens to the mass of an object when they are changed?
Part 1: Change the shape of steel wool
Part 2: Melting ice
Part 3: Burning steel wool
Part 4: Dissolved sugar in water
Part 5: Dissolved Alka-Seltzer

6. Mass and Change Lab Rubric

7. Part 1- Change the shape of steel wool
Data
Part 1- Change the shape of steel wool
Prediction-
Mass Before
Mass After
Change
The lab groups should report their results on the paper posted on the board so that the entire class data can be recorded. Change should be recorded as + (for a gain) or – (for a loss).

8. Data
Part 1- Diagram showing the change of matter at the particle level
Before
After

9. End of Day

10. Unit 1- Mass and Change Notes

11. Law of Conservation of Mass
This law was developed by a French chemist named Antoine Lavoisier.
Lavoisier carefully measured the mass of the reactants and products when carrying out chemistry experiments.
He noticed that in every case, the mass of the reactants was ALWAYS equal to the mass of the products.

12. Law of Conservation of Mass
Historical Context- Year was 1776.
He was the first scientist to recognize and name the elements hydrogen and oxygen.
In 1789, he wrote the first
chemistry textbook.
Oxygen, nitrogen, hydrogen,
phosphorus, mercury, zinc and sulphur (list also included 'light' and 'caloric‘).
 He was executed, along with hundreds of other nobles, during the French Revolution.

13. Law of Conservation of Mass
Key Concept 1: The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, it is conserved.
The mass of the reactants equals the mass of the products.
massreactants = massproducts

16. White Boarding Session
Each lab table will be assigned one experiment from lab.
On the whiteboard collaboratively draw a particle diagram that illustrates the law of conservation of mass for your assigned part.
Assign one person to explain the drawing and the other members need to be ready to answer questions from their classmates/teachers.

17. Conclusion Questions

18. End of Day

19. What is this Matter?
Matter is anything that takes up space and has mass.
Water
Rocks
Air
Wood
Plastic
You
So what not matter?
Point out thing in the room, everything that you point at is matter

20. Matter is….. c
Key Concept 2: Matter is anything made of atoms (particles).
Matter has observable and measurable qualities.
Key Concept 3: Two basic types of properties of matter: physical properties and chemical properties.
Key Concept 4: All matter can undergo change: physical change or chemical change
Point out thing in the room, everything that you point at is matter

21. White Board
Properties
Change

22. Properties
Key Concept 5: Physical properties can be observed without changing the substance(use your senses).
Key Concept 6: Chemical properties are determined by trying to change the make-up of a substance (only evident at the particle level).

23. Change
Key Concept 7: Physical change- the original substance still exists (its particles are still the same); it has simply changed form.
Key Concept 8: Chemical change- takes place on the molecular level and produces a new substance (chemical changes are accompanied by physical changes) (hard to undo).

24. Examples Chemical Properties Physical Properties Physical Change
Chemical Change

25. Salt Physical Property Chemical Property Physical Change
Chemical Change

26. Exit Pass: Physical(PC) or Chemical Change(CC)
Part 1: ____ Change shape
Part 2: ____ Melting ice
Part 3: ____ Burning steel wool
Part 4: ____ Dissolved sugar in water
Part 5: ____ Dissolved Alka-Seltzer