Download Air Investigation continued

Ms. Longo
Earth Science
Weather & Water
9/8
Agenda
Weather summary
Meteorology careers
HW
Bring and old metal fork to class
(optional)
Get weather report for your 2nd city
Do Now
Add a line of learning under FQ
1.2, and add a summary of what
you now know about weather.
Use your 3 notes
Notebook maintenance
Weather Summary
Please add these ideas below your
summary if you do not have them in your
notes or summary:
Weather is all the conditions at one time in
one place.
Weather conditions that can be measured
include temperature, air pressure, and
humidity.
Weather is not the same as climate.
Meteorologists
Handout
Vocabulary Review
Forecast
Meteorologist
Meteorology
Severe weather
Weather
Wind
9/9
Agenda
HW check:
Weather report for your 2nd city
FQ 2.1
Air Investigation
Do Now
NB Maintenance
Open your notebook to your
2nd city weather report
Air Introduction
Think about the extreme weather we saw in the video.
What were some of the phenomena we saw?
What is wind and what is it made of?
To understand wind, we need to understand air.
In investigation 1, we learned about some tools to
measure weather conditions. Air has an important role
in weather, for the next few days we will look closely at
air to learn some of its properties.
FQ 2.1
What is Air?
Please add this new Focus Question to your NB
Answer the question
NB sheet 2, Air Investigation
Attach this page to the next
clean page in your NB.
Syringes
We will be using syringes to
investigate air.
You may use them as long as you do
not use them to annoy another
student.
Air Investigation- 3 minutes
Be prepared to answer these questions:
1. What happens to the air in the syringe
when you push and pull on the
plunger?
2. What can air do?
Record 3 observations on NB sheet 2
Record 3 questions on NB sheet 2
9/10
Agenda
Air Investigation continued
Do Now
NB maintenance
Update table of contents
Number pages
Glue pages
Continue Investigations with
syringes and tubing
Be prepared to answer questions
Hint: try connecting syringes
Air Investigation- 10 minutes
Be prepared to answer these questions:
1. What is inside the barrel of the syringe
when you clamp it shut?
2. Does air take up space?
3. What evidence can you use to
demonstrate that air takes up space?
Air Observation Discussions
Be prepared to answer these questions:
1. When you clamp the tube closed and
push the plunger down, what happens
to the air?
2. Is there more air, less air, or the same
amount of air in the syringe when the
air is pushed into a smaller space?
Air Observation Discussions
Be prepared to answer these questions:
3. What happens when you let go of the
plunger after pushing it down?
4. What do you think happens to the air
when it is pushed into a smaller space?
5. If you pull the plunger out, why does
the plunger move back into the tube
when you release the plunger?
Vocabulary
Compress
Pressure
Expand
Define these words using your own words, and add to
your Vocabulary Index
Make a diagram of the syringe activity as part of your
definitions.
9/11
Agenda
Air Investigation continued
Gas in a Syringe online
activity
Do Now
NB maintenance
Update table of contents
Number pages
Glue pages
Continue Investigations with
syringes and tubing
Be prepared to answer questions
Trapped Air
Pull the plunger out of the barrel
Put a bubble in the barrel, put the plunger back in
halfway, and clamp off the syringe.
Expand and compress the air.
Be prepared to answer these questions:
1. What happens to the bubble when the plunger is
pushed in?
2. Why does this happen?
Gas in a Syringe
Watch the online activity, and be prepared to answer
questions.
Particle
Everything is made out of particles (atoms &
molecules), including air. The particles in gases are free
to move around throughout the volume of gas. There is
a lot of space between the particles in gases.
Compressing a volume of gas into a smaller space
pushes the particles closer together. The number of
particles is the same; they are just closer together. The
size of the particles isn’t any smaller; there is just less
space between them.
Particle
Particles compressed into a smaller space bump into
one another and the sides of the container more often.
Just like when a basketball hits you and bounces off,
you feel a push, each time a particle collides with the
sides of the syringe or the plunger, it gives a tiny push.
All these pushes are what create air pressure. Because
these air particles are bouncing around in all direction,
air pressure pushes in all directions. If the force
keeping the gas compressed is reduced, the gas will
expand into a larger space, and the particles will get
farther apart.
Gas in a Syringe Discussion
Explain your observations with the syringe an plunger
using the concepts of particle collisions and air
pressure.
Group Questions:
Why can’t you push the plunger all the way to the end
of the syringe barrel when the tube is clamped off?
What caused the plunger to move back out when you
release it after you have pushed it in?
What causes the plunger to move back in after you
have pulled it out?