COPPER LAB
PRESENTATIONS!
Have one lab member log on to a computer
Get out your green packet and yellow Copper Lab Rubric
YOU HAVE 5 MINUTES
TO POLISH YOUR
POWERPOINT!
Figure out who is presenting what.
Join Google Classroom Turn in Lab
•Period 1= ykxs66
•Period 3= e8rw894
•Period 4= ac(zero)uwe
•Period 5= rkcuv5r
•Period 6= 7n2k8am
Find a “partner” lab group
•
You will be presenting to each other.
•
Rock paper scissors (winner presents first)
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Score them on
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Once finished, take a minute and finish up your score
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Have other group present
•
Double check that you have finished your green packet… wait for instructions
their rubric on the Peer Score Side
Reflection
•
Write all the lab group members on a piece of paper and score yourself and your lab
members out of ten. Please include a brief explanation to defend the scores you gave.
10= super helpful and reliable
7 = was helpful most of the time
5= kinda helpful
3- pretty much dropped the ball
0- might as well have been gone
Fold your paper in half so your ratings are hidden and put it in the
pink basket
•
Lab member ___(you)______= XX/10, because…
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Lab member ______________= XX/10, because…
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Lab member ______________= XX/10, because…
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Lab member ______________= XX/10, because…
How to turn in your materials
Get a gold piece of paper and write your names and beaker code
Paperclip in this order
1.
Your folded up participation scores
2.
Gold piece of paper
3.
Yellow Rubric
4.
Green Packet
Entry Task
•
Draw a small particle model for each scenario
Solid H2O
Liquid H2O
Gaseous H2O
Entry Task
•
Draw a small particle model for each scenario
Solid H2O
Liquid H2O
Gaseous H2O
GAS LAWS
Chapter 13
Properties of gases
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Gases are made of covalently-bonded non-metals
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Ex: CO2, H2, He, O2, NO2
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Gases are easily compressed, fill a container and mix completely with other gases
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Gases exert pressure on their surroundings
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Ex: air in a balloon, gas in the intestines
Atmospheric pressure
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Atmospheric pressure = how much pressure atmospheric
gases are exerting on us
•
•
Result of gravity pulling air towards earth
Measured by a barometer
•
•
•
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Bar=pressure
Meter=measure
At sea level, normal pressure is 760mm Hg
We measure in inches of Hg
Units used to measure pressure
Standard Pressure (at sea level) =
• 14.7 lb/in2 or psi,
• 101.3 kPa,
• 1 kPa = 1000 Pa
• 760 mmHg
• 1 atm
• 1.013 bar
Gases & pressure- why care?
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Predictor of weather
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Shaking a pop can
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Scuba diving
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Mountain climbing
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Space exploration
•
Your examples?!?
Causes of Pressure
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Consider this sample of air, the circles represent atoms
•
What is causing the pressure in this sample?
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Is the pressure changing? Why or why not?
•
What is pressure?
Pressure
# of particle collisions
at a given time.
Caused by particles
hitting each other
AND the walls of the
container.
Bernoulli’s Principle
The flow/speed of molecules changes gas pressure
•
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As speed increases, pressure decreases
As speed decreases, pressure increases
Why?
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Increasing air speed aligns molecules  less collisions, LOWER pressure
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Slower air is more chaotic  more collisions, HIGH pressure
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Everything flows from high to low pressure
Bernoulli and lift
NO HOMEWORK!
Have a great break!