1. May 9, 2018 You need: Clean paper (2) / pencil
Composition of Air notes
Lab
Warm Up:
Mental Math Quiz will begin shortly. Be ready!
I CAN: determine how heat is transferred – and how it relates to density and pressure.

2. Teacher Workday Swagrrr No 7th test ELA 7 Math 7 Math I
May 2018
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Forces and energy
Magnets 1
Magnets / eclectricity 2
Electricity 3
Catch up 4
Review
Test Assess
MobyMax Milkshakes 5 6 7
Comp of Air
Layers, Water Cycle 9
Atmosphere 10 11 12 13
Mother’s Day 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
No School
Memorial Day 29 30 31
APRIL 30
Progress reports
Teacher Workday
Swagrrr
No 7th test
ELA 7
Math 7
Math I

3. June 2018 EOG testing Busch Gardens NCFE Sci/SS 1 2 3 4 5 6 7
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday 1
Atmosphere 2 3 4 5 6 7
8 Last day (due to snow) 9
EOG testing
Busch Gardens
NCFE Sci/SS

4. Demo – hand-warmer
Explain the hand-warmer demo Ms.Garris showed.

5. Mixture of Gases in Air All Other Gases Argon = 0.93%
Carbon Dioxide = 0.04%

6. NITROGEN A major part of proteins, including DNA
Dilutes (thins out) the oxygen – too much or too little oxygen and we would die!
Turned into useful form
by nitrogen-fixing bacteria

7. OXYGEN Necessary to survive! Our cells use oxygen to create energy
All of the oxygen in our atmosphere has been created by plants – photosynthesis!
Burning requires oxygen

8. CARBON DIOXIDE Used by plants for photosynthesis
A greenhouse gas – carbon dioxide helps keep our planet warm
Increases in CO2 have been making the planet warmer: global warming!

9. TRACE GASES OZONE helps filter out the sun’s harmful rays
ARGON is used in light bulbs because it will not catch fire even in extreme heat
WATER VAPOR can condense to form clouds
HELIUM inflates balloons and
blimps

10. Earth’s atmosphere makes conditions on Earth suitable for living things:
It traps energy from the sun keeping the Earth warm.
The heat also keeps water in liquid form (good for life)
It protects Earth from dangerous radiation and meteor collisions.

11. Let’s make a model!
Write the notes ONTO the correct layer.
Add color to the layers and the pictures.
Cut out the layers and the pictures.
Assemble on your notebook paper.
**Be careful to place them low enough on the page so that they don’t stick out of the top of your binder!!**

12. TROPOSPHERE Shortest Layer (0-12 km)
Average Temperature of 25°C (Temperature drops as you go higher)
All of Earth’s weather happens here.
Air here contains water & dust.
Most of the atmosphere’s air is here (this layer is very dense).

13. STRATOSPHERE From the troposphere to about 50 km above earth’s surface
There is almost no water or dust in this layer.
Contains the OZONE LAYER (which absorbs UV radiation from the sun)
Very cold, until the top of the layer, where it warms to 0°C.

14. MESOSPHERE 50-80 km above Earth’s surface.
Temperature plunges to -90°C (the coldest in the atmosphere)
Meteors burn up here while entering the atmosphere (friction). It offers protection.

15. THERMOSPHERE Thickest layer (80-400 km above Earth’s surface).
Really thought of as two layers: ionosphere and exosphere.
Ionosphere contains ions or charged particles allowing radio waves to bounce off and auroras to occur.
Temperature can spike to 1,800°C.

16. EXOSPHERE “Exo-” means outer. Outer-most layer of the atmosphere.
Not truly seen as a layer since it simply blends into outer space.

17. Comparing size and filler
So yesterday, we talked about the layers of the atmosphere in comparison.
If I take a slice – the portion of the TROPOSPHERE is smaller than the portion of the MESOSPHERE.
We were comparing
DENSITY

18. Back to your notes page…
Altitude, or elevation, is the distance above sea level.
As altitude increases, air pressure decreases.
Air pressure decreases and this also means that density decreases.
Low density can make it difficult to breathe (due to less oxygen)

19. Increase altitude =
Decreased air…
Decreased density
Decreased air pressure

20. Decrease altitude =
Increased air…
Increased density
Increased air pressure

21. Air pressure
Air pressure – the result of weight of a column of air pushing down on an area, measured by an instrument known as a barometer.
Barometer = Air pressure

22. Air Pressure in a Syringe
Which syringe has the air under greater pressure?
Which one is showing greater density?
Low
Pressure
High
Pressure

23. Exploring Air with Syringes
Based on the investigation:
What can air do?
A few words you need to know…
Compress – means to squeeze into a smaller space
Density – the amount of mass (stuff) in a certain amount of space (volume)
Air Pressure – the force of air pushing on stuff
Barometer – a tool that measures air pressure
COMPRESS

24. Is air pressure strong enough to push an egg into a bottle?

25. Homework
Based on the egg in the bottle, write at least three sentences explaining how/why it worked.
How can we get the egg out?