Implosions and Explosions

***DON'T FORGET YOUR ART HOMEWORK- DO IT AND BRING IT!

1. Thursday's class:  we will begin  with a game of Twenty Questions --yes/no questions about the tanker--you be the detective to figure out what caused the implosion.  Yes, it was an accident. Someone was just not thinking!

Think of a few questions and write them in your SJs

2. Comic Strip explaining the sequence of events as we heated the water in the cola can and then plunged it into ice water.  5 Panel minimum, and show the  regular air particles as O's and the steam as X's. Use arrows ---> to represent Pressure.  Remember to put the  particles both in and out of the can, and to consider temperature and pressure changes as well what happens when stuff is heated or suddenly cooled. And also  consider the phase changes (liquid>steam or steam>liquid)

1. can with liquid water in the bottom and air particles above, also the particles outside the can
2. heat added, what changes inside and out
3. more heat added, more changes
4. can on its way into the ice-water bath
5. can collapsing

and always show what the particles are doing, both in and out of the can, as well as the pressure, both in and outside the can.

3.  Math Moment! You will need a soda can for this>>figure out the total air pressure on the outside of the can.      this is how:

• find the surface area of the can (cylinder) in inches 
• tutorial  here https://www.youtube.com/watch?v=gi7aaZ87EoQ
• multiply the surface area  by 14.7 pounds per square inch. (This is the atmospheric pressure at sea level).
• This is the total pressure on the outside of the can in pounds.
• Show your work in your SJ.

4. 28-minute video: Modeling the Unseen you will need to click on the VOD button for #4 probably twice

      and worksheet  https://drive.google.com/file/d/0B07s3-bcUr7tM3Z2N3FzN2gyZjA/edit?usp=sharing

*******Purple highlights are the checklist of homework to be done.**************

Just for the fun of it: EXPLOSIONS!!!

The Incredible Shrinking Marshmallow:

(and now the scientific title)
Exploring the Relationship Between the Volume of a Container and the Pressure of the Gas
Homework today is to write (or re-write) the Marshmallow Madness worksheet.
https://docs.google.com/file/d/0B07s3-bcUr7tcEJwT2xjNWU2bHc/edit?usp=sharing
Your hypothesis should be an "if-then" statement, your data will be drawings, and your conclusions should be a discussion of how this experiment supports the Kinetic Particle Theory.  Also refer to your textbook 16.3 under "Boyle's Law."

• All matter is made of particles
• All particles are in constant random motion
• and are constantly colliding with the walls of their container and with each other

To Think About:  What is the difference between a scientific law, a scientific theory and a scientific model?

REMINDER: Art homework is to completely draw the Pizza - 15 slices on the media paper, and be ready to paint next Thursday.

The ABC's of Gas Laws

This is Mr. Boyle

Marshmallow Lab >>> What a mixed-up class I gave this morning! I apologize for my brain-freeze, I actually worked really hard to put it together, but I tried to do too much at once.  However, here are some resources that will help you get a handle on how the Kinetic Particle Model explains the properties of gases
.

We are looking for the answer to these two questions:

• What is Pressure?  
• Explain how a gas is affected when pressure, temperature or volume is changed. 

 AND TAKE NOTES!

• Read textbook chapter 16.3 Behavior of Gases (pages 502-507)  Answer the reading checks as you go (in your book is OK) and  in your SJ -   What is Pressure?  (you may skip the math boxes)
• 
  
• click bold type highlighted words to see animations-- there are 3
• Explain how a gas is affected when pressure,     temperature     or volume is changed. (that's actually 3 questions--and drawing a diagram is helpful.) Did you click on the 3 animations?)

Marshmallow Lab ...  Here's the worksheet that's actually how we write up lab reports. https://drive.google.com/file/d/0B07s3-bcUr7tcEJwT2xjNWU2bHc/edit?usp=sharing Question: What two variables are we testing when we place a baby marshmallow in a syringe, seal it with our finger and adjust the amount of space? Hint: it's not the marshmallow! Tell me what you think in the comments below.
We will go over this on Thursday, along with some math, so bring your calculators.


Photocopy one page-spread of your science journal - your best - to turn in on Thursday.
Remember to take notes in class and when watching videos at home, and on each page there should be a drawing or diagram or graph or word-picture that stands out.  You should not skip pages, you should have titles and dates for each section, you should use pen.  Crossing out is fine, but avoid major scribbling or tearing out.  Read this paragraph one more time.

THis is OPTIONAL>>>

Great job on the thermometers!

Great job on the thermometers! if you are wondering where yours is, it is probably in my car, having gotten accidentally packed. For homework today:

1. Draw a diagram of your thermometer and write up an explanation of how this thermometer works, using our kinetic molecular theory [particles...motion...collide]

2. Finish up the lab report, if you have not yet done so.  (see last Monday's homework)  Turn in on Monday.

Next week I will have you turn in a photocopy of your "best page" science journal, and I may have a pop quiz on chapter 16.1.

Have a great weekend!


REMINDER FOR ART:   COLOR PIZZAS - MAKE A PATTERN ON THE HANDOUT - ONE OR TWO SLICES  OR ALL FIVE -- USE A WINDOW FOR A "LIGHT TABLE"

https://drive.google.com/file/d/0B07s3-bcUr7tYzNtY05KaFk3d0k/edit?usp=sharing

who ever though boiling water was simple?

1. What? you didn't complete last weeks homework?!?  Go back and make sure you really did all that you were supposed to, and that includes writing in your science journals --did you copy the graph on page 492?  Re-read that paragraph too.  And then  go here and press play...
http://www.alchemical.org/thermo/other/heatingcurve.swf

2. Watch the video here: http://www.nsf.gov/news/special_reports/chemistrynow/chem_ice.jsp
Write about 5 facts in your journal  Title+ 1,2,3,4,5.

3. Write up the lab report, neatly, to turn in.  One+ page double-spaced typed or pen. Turn this in for a "gentle" grade.  Due next Monday.  ...but start now.

• Title
• Question
• hypothesis
• draw the set-up
• data table
• graph
• conclusion

4.   Worksheet from class:   Comparing Celsius, Kelvin and Fahrenheit temperature scales, with math (use calculators).  [9/5 can also be 1.8].  Get help if you need it,   Answers  are here

On Thursday we will make our own thermometers, so if  you have a small jar or bottle with lid, bring that to class -- not too big and thinner is a little better.  Baby food jar, spice jar,  just not huge, and I will have some extras if you can't find anything.  

still boiling...

1. About yesterday's experiment: The Heating Curve of Water --

We will work some more on this Monday in class.  

2.  Thermometers and temperature scales:

3. Eureka Science Videos 18-20: Note-taking means writing down "The Story So Far.." in your science journals.

 m

4. Textbook Reading: Read chapter 16.1 Kinetic Theory, reviewing what you have already read and completing the rest of the section. AS YOU READ:

• Answer the "Reading Check" which comes at the end of each  sub-section.  You have enough room in your textbooks to write in them directly. (but you can also write in your journals if you are sharing; just include the question.)  
• Also in your textbooks, highlight or underline all the vocabulary  from the list at the beginning of the section.  
• Pay particular attention to page 492 Heating Curve of Water and copy the graph (figure 7),  in your journals;  also in your journal Explain particle behavior at the melting and boiling points. Write in Paragraph form, and explain carefully enough that your younger sibling would understand. 

...it should look like this (from last week's homework): https://drive.google.com/file/d/0B07s3-bcUr7tNVdIMlBYWXRWa0E/edit?usp=sharing

kinetic theory - heating curve of water

PLEASE NOTICE THIS IS HOMEWORK FOR 2 DAYS - DO SOME ON TUESDAY AND SOME ON WEDNESDAY! (but do it in order, please.)

1. Take some time to recall the demonstration at the end of class --putting the helium balloon over the stove and then into the freezer.  Describe what happened to the balloon, and then try to explain why it happened; what were the particles doing?  Use the Kinetic Molecular Theory to explain.  [particles...motion...colliding]  WRITE THIS IN YOUR SCIENCE JOURNAL. Try to explain it so that your brother/sister  who has never studied this could understand.

 

2.  Watch these videos, and take note/draw the pictures.

3.   BrainPop : http://www.brainpop.com/science/matterandchemistry/matterchangingstates/

(username: pcshome   password: ilearnathome)  watch the movie, print out the  activity sheets,  then re-watch the movie in order to  complete the pages.   [What I mean is, print out pages called  "activity"  "graphic organizer" and the "vocabulary" and fill them in with info from the movie.] Take the quiz, read the FYI (don't forget to select each circle at the top of that page.)  call me if this makes no sense  858-4191/cell or 892-8540/home.

4.  Reading in textbook: pages 488-491 - you may write/underline/highlight in your books! I recommend it!  They belong to you.  It helps you remember.

5.   pHet simulations: http://phet.colorado.edu/en/simulation/states-of-matter-basics  This requires you to have Java on your computer. Download or Run Now, whatever works.  Get help to get this working,  because we will use this site often.  P
lay around with the simulation for a while, to get the hang of it.

And that's it!  See ya Thursday. 😎👌🙋  [I try to make homework that takes about 2 hours to complete, one hour for Tuesday and one hour for Wednesday.  Not everyone is the same, however, so some of you may do this more or less quickly.  Don't let yourself get distracted by stuff on the internet, and make sure you have the "Safety On" when you do YouTube. I wish there was a "homework mode" for students, no FB etc, because that would be brilliant. Tell me if you hear of one.]

This homework is very "light"

Shorty Homework:

watch this video, and in you science journals, write 10 things you didn't already know about helium.

This next video is also about helium - try to find 5 more new things to write down about helium.

AND THAT's ALL!!