1. Is it a chemical or physical
change when you make
scrambled eggs? Why?
2.If I mix baking soda with
vinegar and a gas is...
Demos… (Before)
Make some qualitative observations.
What do you think will happen?
Explain.
Demos…
Make some qualitative
observations.
What happened? Explain.
Demos…
States of Matter
Chapter 2
• 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 ...
4 States of Matter
• Chapter 2; Section 1
I. States of Matter
• Physical form of a substance
• 4 states of matter
Why does the air freshener smell
up the entire room over time?
• Matter is made of atoms &
molecules; They are ALWAYS
moving
• STATES OF MATTER= changes
in Speed & attraction of the
mol...
A. Solids
• Definite shape and volume
• Particles close together
• Strong attraction
• Particles vibrate in place
1.What ways are solids,
liquids, and gases
different?
B. Liquids
• Change shape NOT volume
• Take the shape of the container
• Molecules slide around
• Difficult to squeeze together
Gels?
• Liquids that have tiny solids
suspended in them
• Elastic properties
1.Take out your Review Sheet
2.What are 2 things you learned
in chapter 1?
3.What is 1 thing you don’t
understand?
1.How do molecules move in
solids?
2.How do molecules move in
liquids?
3.How tightly packed are the
molecules in solids an...
Demos…(After)
Make some qualitative
observations.
What happened? Why?
Demos…
What is happening in the
flask? Why-is it a chemical
change or a physical
change? Explain.
• Drop 2 drops of food coloring
into the flour on the plate
• Put the clean toothpick into 1
drop
• Put the toothpick dipp...
1. Surface Tension
• Force causing liquids to form
spherical drops
2. Viscosity
• Liquid’s resistance to flow
C. Gases
• Change shape and volume
• Move so fast they break apart
• Less attraction
• Empty spaces
• What did you observe about the
2 containers?
• Why did it take longer for the lid
to pop off one of them?
1. Pressure
• Force on an area
• Number of collisions of particles
against the container
D. Plasmas
• No definite shape or volume
• Molecules are broken apart
• Conduct electricity; affected by
electric and magnetic fields
1.What are the properties that
describe a liquid?
2.What are the properties that
describe a gas?
II. Gas Laws
• Gases show big volume
changes
• Based on pressure and
temperature
A. Boyle’s Law
• For a fixed amount of gas at a
constant temperature, the
volume of a gas increases as its
pressure decrea...
B
o
y
l
e
’
s
O
p
p
o
s
i
t
e
P
r
e
s
s
u
r
e
If P then V
If P then V
• Observe the balloons inside the
beakers.
• What do you notice happening
to each?
• Explain why one gets larger
while one...
B. Charles’s Law
• For a fixed amount of gas at a
constant pressure, volume
increases as temperature
increases
• Also, vol...
C
h
a
r
l
e
’
s
S
a
m
e
T
e
m
p
e
r
a
t
u
r
e
If T then V
If T then V
?????
• One of your friends over inflated
the tires on their bicycle. Use
Charles’s Law to explain why
they should let out...
1.What does Boyle’s Law mean?
2.Why does volume increase when
you decrease pressure?
The Can Crusher
• Observe the experiment.
• Why did the can crush??????
Hmm…
• Why does popcorn pop?
Recap…
1.What can you observe about the
2 experiments?
2.Explain what is actually
happening to cause each.
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States of matter 2010

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States of matter 2010

  1. 1. 1. Is it a chemical or physical change when you make scrambled eggs? Why? 2.If I mix baking soda with vinegar and a gas is produced, is that a chemical or physical change? Why?
  2. 2. Demos… (Before) Make some qualitative observations. What do you think will happen? Explain.
  3. 3. Demos… Make some qualitative observations. What happened? Explain.
  4. 4. Demos…
  5. 5. States of Matter Chapter 2
  6. 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. 7. 4 States of Matter • Chapter 2; Section 1
  8. 8. I. States of Matter • Physical form of a substance • 4 states of matter
  9. 9. Why does the air freshener smell up the entire room over time?
  10. 10. • Matter is made of atoms & molecules; They are ALWAYS moving • STATES OF MATTER= changes in Speed & attraction of the molecules
  11. 11. A. Solids • Definite shape and volume • Particles close together
  12. 12. • Strong attraction • Particles vibrate in place
  13. 13. 1.What ways are solids, liquids, and gases different?
  14. 14. B. Liquids • Change shape NOT volume • Take the shape of the container
  15. 15. • Molecules slide around • Difficult to squeeze together
  16. 16. Gels? • Liquids that have tiny solids suspended in them • Elastic properties
  17. 17. 1.Take out your Review Sheet 2.What are 2 things you learned in chapter 1? 3.What is 1 thing you don’t understand?
  18. 18. 1.How do molecules move in solids? 2.How do molecules move in liquids? 3.How tightly packed are the molecules in solids and liquids?
  19. 19. Demos…(After) Make some qualitative observations. What happened? Why?
  20. 20. Demos… What is happening in the flask? Why-is it a chemical change or a physical change? Explain.
  21. 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. 22. 1. Surface Tension • Force causing liquids to form spherical drops
  23. 23. 2. Viscosity • Liquid’s resistance to flow
  24. 24. C. Gases • Change shape and volume • Move so fast they break apart
  25. 25. • Less attraction • Empty spaces
  26. 26. • What did you observe about the 2 containers? • Why did it take longer for the lid to pop off one of them?
  27. 27. 1. Pressure • Force on an area • Number of collisions of particles against the container
  28. 28. D. Plasmas • No definite shape or volume • Molecules are broken apart
  29. 29. • Conduct electricity; affected by electric and magnetic fields
  30. 30. 1.What are the properties that describe a liquid? 2.What are the properties that describe a gas?
  31. 31. II. Gas Laws • Gases show big volume changes • Based on pressure and temperature
  32. 32. A. Boyle’s 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. 33. B o y l e ’ s O p p o s i t e P r e s s u r e If P then V If P then V
  34. 34. • Observe the balloons inside the beakers. • What do you notice happening to each? • Explain why one gets larger while one gets smaller.
  35. 35. B. Charles’s Law • For a fixed amount of gas at a constant pressure, volume increases as temperature increases • Also, volume decreases as temperature decreases
  36. 36. C h a r l e ’ s S a m e T e m p e r a t u r e If T then V If T then V
  37. 37. ????? • One of your friends over inflated the tires on their bicycle. Use Charles’s Law to explain why they should let out some of the air before going for a ride on a hot day.
  38. 38. 1.What does Boyle’s Law mean? 2.Why does volume increase when you decrease pressure?
  39. 39. The Can Crusher • Observe the experiment. • Why did the can crush??????
  40. 40. Hmm… • Why does popcorn pop?
  41. 41. Recap…
  42. 42. 1.What can you observe about the 2 experiments? 2.Explain what is actually happening to cause each.

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