1. WELCOME!!
Welcome. Please come in and sit in your seat. Then wait for further instructions.
On your Catalyst sheet you should be on January 29th

2. CATALYST
5 MINUTES
List ten things you have done with water in your life.

3. CATALYST
4 MINUTES
List ten things you have done with water in your life.

4. CATALYST
3 MINUTES
List ten things you have done with water in your life.

5. CATALYST
2 MINUTES
List ten things you have done with water in your life.

6. CATALYST
1 MINUTE
List ten things you have done with water in your life.

7. TIME’S UP!!!!!

8. 10 Things you’ve done with water in your life?

9. AGENDA
Catalyst
Properties of Water Notes.

10. ANNOUCEMENTS
Always see me for help either before or after school if you are concerned about your grade 
Have bottles with you by tomorrow. If not enough, we can’t do suspension.
Yesterday’s lab.

11. Today we will learn cohesion and adhesion work together in nature.
TODAY’S OBJECTIVE
Today we will learn cohesion and adhesion work together in nature.
HS-PS1-3: Investigate the structure of substances at the bulk scale to infer the strength of electrical forces between atoms.

12. 10 Things you’ve done with water??

13. Water What is the chemical formula for water? H2O
Think back to bonding, if the atoms that make up water are hydrogen and oxygen, what sort of bond is it?
Covalant?

14. Properties of Water
So water has a shared covalent bond. This bond is formed because of the attraction between a (+) charged Hydrogen and a (-) charged Oxygen.
So, is it possible for water to have both a hydrogen bond and covalent bond.
Yes!!!!!!!!!

15. Properties of Water
Cohesion holds hydrogen bonds together to create surface tension on water. Since water is attracted to other molecules, adhesive forces pull the water toward other molecules.
Responsible for the beading up of water.

16. Properties of Water Examples of Cohesion/Adhesion:
1) Shape of raindrop
2) water beading up on leaves
3) water beading up on wax
In other words, cohesion is the force of molecules of the same substance. Adhesion is the force of attraction between different substances.

17. Properties of Water
The cohesive forces among liquid molecules are responsible for the phenomenon of surface tension. In the bulk of the liquid, each molecule is pulled equally in every direction by neighboring liquid molecules, resulting in a net force of zero.
This elastic tendency of water which makes it acquire the least surface area possible is surface tension. (Thanks to cohesion.)

18. Properties of Water https://www.youtube.com/watch?v=RphuMEUY3Og
So how can water striders walk on water?
They can utilize the film created by surface tension AND their legs are covered with microscopic hairs that trap tiny air bubbles, allowing the insect to simply float

19. Exit Ticket
Complete the half sheet before leaving the classroom.

20. WELCOME!!
Welcome. Please come in and sit in your seat. Then wait for further instructions.
On your Catalyst sheet you should be on January 30th

21. CATALYST
5 MINUTES
What is the difference between cohesion and adhesion?
Why can a water strider walk on water?

22. CATALYST
4 MINUTES
What is the difference between cohesion and adhesion?
Why can a water strider walk on water?

23. CATALYST
3 MINUTES
What is the difference between cohesion and adhesion?
Why can a water strider walk on water?

24. CATALYST
2 MINUTES
What is the difference between cohesion and adhesion?
Why can a water strider walk on water?

25. CATALYST
1 MINUTE
What is the difference between cohesion and adhesion?
Why can a water strider walk on water?

26. TIME’S UP!!!!!

27. Catalyst Answer What is the difference between cohesion and adhesion?
Cohesion is the force of attraction between molecules of the same substance.
Adhesion is the force of attraction between molecules of different substances.
Why can a water strider walk on water? It takes advantage of the film on water created by surface tension and it has hairs on it legs full of air pockets.

28. AGENDA
Catalyst
Properties of Water Notes continued.

29. ANNOUCEMENTS
Always see me for help either before or after school if you are concerned about your grade 

30. TODAY’S OBJECTIVE
Today we will learn the phases of water and learn how to tell an immiscible substance.
HS-PS1-3: Investigate the structure of substances at the bulk scale to infer the strength of electrical forces between atoms.

31. Phases of water… What are the three phases of water?
Solid, liquid, gas.
How does each phase look on the molecular level? What examples of each phase?

32. Miscible vs. Immiscible substances
The ability of a liquid to be mixed with another liquid is known as a miscible substance.
If the molecules in the liquids are repelled by each other and will not sizzle, then the liquids are immiscible.

33. Miscible or Immiscible
Ice cubes in pop
Miscible
Baking soda in water
Immiscible
Sugar and grape kool-aid mix
Oil and Water
Immiscible!!!!!!!!!!