air, it's really there - rowan.k12.ky.us unit... · chemistry unit lesson 1.5 air its really...
TRANSCRIPT
Chemistry Unit Lesson 1.5 Air its really there.notebook
1
November 25, 2012
Air, It's Really There
Learning TargetPre
AssessBig Ideas
Post
Assess
I can describe, on the molecular level, the effect
of heating and cooling on the motion of molecules of a
gas.
Chemistry Unit Lesson 1.5 Air its really there.notebook
2
November 25, 2012
Is it Matter?
a. helium
b. oxygen
e. electricity
c. radiation
f. air
i. water vapor
h. heat
g. light k. carbon dioxide
l. metald. rock
j. clouds
On a sheet of paper, write the letters of the items that are NOT matter.
Chemistry Unit Lesson 1.5 Air its really there.notebook
3
November 25, 2012
Demo Does a Gas Have Mass?
Ball
Compressed Air
http://www.middleschoolchemistry.com/multimedia/chapter1/lesson5#air_has_mass_ball
Before _____ After _____
Before _____ After _____
Chemistry Unit Lesson 1.5 Air its really there.notebook
4
November 25, 2012
Particles of a Gas
http://www.middleschoolchemistry.com/multimedia/chapter1/lesson5#air_has_mass_ball
• Particles of a gas have very little attraction for each other.
• They collide with each other and bounce off.• The space between molecules is made up of nothing.
Chemistry Unit Lesson 1.5 Air its really there.notebook
5
November 25, 2012
EXPLORE
Part A: Warming the air inside a bottle.
Part B: Cooling the air inside a bottle.
Chemistry Unit Lesson 1.5 Air its really there.notebook
6
November 25, 2012
Explain
What happened to the film of detergent solution when you placed the bottle in hot water?
What happened to the bubble when you placed the bottle in cold water?
Chemistry Unit Lesson 1.5 Air its really there.notebook
7
November 25, 2012
Animation
• Red arrows represent the outside air pushing down on the bubble film.
• Heating the air makes the molecules move faster.• Collisions with the bottle and bubble film increase and become harder.
• This pushes the bubble up.
Chemistry Unit Lesson 1.5 Air its really there.notebook
8
November 25, 2012
Cooling a Gas
• Cooling the gas makes the molecules move more slowly.
• These slower moving molecules hit the bottle and bubble film less often and with less force.
• The molecules in the outside air are moving faster and push the bubble film inside the bottle.
Chemistry Unit Lesson 1.5 Air its really there.notebook
9
November 25, 2012
Compare molecules in a solid, liquid, and gas (same temperature).
solid particles are very attracted to one another, vibrate but can't move past one another, has definite volume and definite shape.
liquid particles are attracted to one another, vibrate and can move past one another, have definite volume but not definite shape.
gas particles are not attracted to one another much at all, move freely, can move past one another, particles spread out evenly to fill a container.
Chemistry Unit Lesson 1.5 Air its really there.notebook
10
November 25, 2012
Take it Further
Imagine that you work at a party store during the summer. You are going to ride home with the owner of the store whose car has been sitting in the hot sun all day long. The owner tells you that you can take home a bunch of balloons, but advises you to not blow the balloons up all of the way. Knowing what you do about the heating the molecules of a gas, explain why the owner's advise is wise.
Chemistry Unit Lesson 1.5 Air its really there.notebook
11
November 25, 2012
Is it Matter?
a. helium
b. oxygen
e. electricity
c. radiation
f. air
i. water vapor
h. heat
g. light k. carbon dioxide
l. metald. rock
j. clouds
On a sheet of paper, write the letters of the items that are NOT matter.
c, e, g, h
Chemistry Unit Lesson 1.5 Air its really there.notebook
12
November 25, 2012Molecules in Moon Writer’s Frame
Write about molecules arrangement, moon, and speed.
In Acvity 1.1, 1.2, and 1.3, we learned about molecules in a liquid. In these acvies, I found out molecules in a liquid are____________________________ When molecules in a liquid are heated, they_____________________________. In acvity 1.3, I learned that when thermometers are placed in a hot liquid, the red liquid moves up the tube because _________________________________________________________________. In acvity 1.4, I learned about the molecules in a solid. When the solid was heated, the molecules__________________________. In the final acvity, I learned about the molecules in gases. First of all, I learned that gases are maer because __________________________
Then I heated air in a bole with a soap film over the top. I found out that when gas molecules are heated they ______________________________________.
Chemistry Unit Lesson 1.5 Air its really there.notebook
13
November 25, 2012
LT3 Formative Assessment
Grade:«grade»Subject:Science
Date:«date»
Chemistry Unit Lesson 1.5 Air its really there.notebook
14
November 25, 2012
1
A
B
C
D
When a thermometer is cooled, the red liquid inside the thermometer moves down. This is mainly because:
Cold liquids sink so the color falls in the thermometer
Hot liquids are lighter so the liquid moves down the thermometer.
The molecules move faster, and get a little further apart allowing the liquid to lower
The molecules of the liquid move slower and get a little closer together.
Chemistry Unit Lesson 1.5 Air its really there.notebook
15
November 25, 2012
2
A
B
C
D
When you heat a sample of a solid, the particles that make up the solid:
Get bigger
move faster
become more dense
slow down
Chemistry Unit Lesson 1.5 Air its really there.notebook
16
November 25, 2012
3
A
B
C
D
If you put food coloring in room termperature water, the coloring spreads throughout the water. The water causes the color to spread mainly because:
The water molecules are warm
The water molecules are attracted to the food coloring.
The water molecules are in motion
The water is more dense that the food coloring.