States of matter 2010

• 1. Warm-Up
  Is it a chemical or physical change when you make scrambled eggs?Why?
  If I mix baking soda with vinegar and a gas is produced, is that a chemical or physical change?Why?
  

2. Demos (Before)
Water
Vinegar
Make some qualitative observations.
What do you think will happen?Explain.
3. Demos
Before
After
Make some qualitative observations.
What happened?Explain.
4. Demos
Before
After
5. States of Matter
Chapter 2
6. Dip a Q-tip in the rubbing alcohol
Rub the Q-tip on the back of your hand
What observations can you make about this process?
7. 4 States of Matter
Chapter 2; Section 1
8. I. States of Matter
Physical form of a substance
4 states of matter
9. Why does the air freshener smell up the entire room over time?
10. Matter is made of atoms & molecules;They are ALWAYSmoving
STATES OF MATTER= changes in Speed & attraction of the molecules
11. A. Solids
Definite shape and volume
Particles close together
12. Strong attraction
Particles vibrate in place
13. Warm-Up
What ways are solids, liquids, and gases different?
14. B. Liquids
Change shape NOT volume
Take the shape of the container
15. Molecules slidearound
Difficult to squeeze together
16. Gels?
Liquids that have tiny solids suspended in them
Elastic properties
17. Warm-Up
Take out your Review Sheet
What are 2 things you learned in chapter 1?
What is 1 thing you dont understand?
18. Warm-Up
How do molecules move in solids?
How do molecules move in liquids?
How tightly packed are the molecules in solids and liquids?
19. Demos(After)
Water
Vinegar
Make some qualitative observations.
What happened?Why?
20. Demos
What is happening in the flask?Why-is it a chemical change or a physical change? Explain.
21. Drop 2 drops of food coloring into the flour on the plate
Put the clean toothpick into 1 drop
Put the toothpick dipped in soap into the other drop
What observations did you make?
22. 1. Surface Tension
Force causing liquids to form spherical drops
23. 2. Viscosity
Liquids resistance to flow
24. C. Gases
Change shape and volume
Move so fast they break apart
25. Less attraction
Empty spaces
26. What did you observe about the 2 containers?
Why did it take longer for the lid to pop off one of them?
27. 1. Pressure
Force on an area
Number of collisions of particles against the container
28. D. Plasmas
No definite shape or volume
Molecules are brokenapart
29. Conduct electricity; affected by electric and magnetic fields
30. Warm-Up
What are the properties that describe a liquid?
What are the properties that describe a gas?
31. II. Gas Laws
Gases show big volumechanges
Based on pressure and temperature
32. A. Boyles Law
For a fixed amount of gas at a constant temperature, the volume of a gas increases as its pressure decreases
Volume decreases as pressure increases
33. Boyles
Opposite
Pressure
If Pthen V
If Pthen V
34. Observe the balloons inside the beakers.
What do you notice happening to each?
Explain why one gets larger while one gets smaller.
35. B. Charless Law
For a fixed amount of gas at a constant pressure, volume increases as temperature increases
Also, volume decreases as temperature decreases
36. Charles
Same
Temperature
If Tthen V
If Tthen V
37. ?????
One of your friends over inflated the tires on their bicycle.Use Charless Law to explain why they should let out some of the air before going for a ride on a hot day.
38. Warm-Up
What does Boyles Law mean?
Why does volume increase when you decrease pressure?
39. The Can Crusher
Observe the experiment.
Why did the can crush??????
40. Hmm
Why does popcorn pop?
41. Recap
42. Warm-Up
What can you observe about the 2 experiments?
Explain what is actually happening to cause each.