What we learned in class:
A chemical change is when a compound changes its composition and a new substance is formed which has different properties. Some clues are bubbling or fizzing when a gas is formed, a cloudy substance when a solid is formed (a precipitate), a color change or a temperature change.

 Also, since new substances are formed from the atoms of the old substances, the mass will be the same.  No atoms are lost or created in the making of the reaction. They are just rearranged. This is a law of science -- the Law of the Conservation of Matter.

 ==Homework:
1. Answer the questions from the lab handout. (Many of the answers can be found on the cover page.)
2. Watch this video from The World of ChemistryThe World of Chemistry - Color 28 min. No notes required.
  [Click the VOD button for lesson 2, Color, and then click it again.   It works on the second try.]

Test on Chapter 17 next Thursday.  Come on Monday with your questions.
Levitating Pumpkins! Halloween Science  2 minute video.

Homework:

from our textbook, Chapter 17: Classification of Matter, pages 538-541, Study guide and Chapter Assessment.   Use binder paper to turn it in. (Ink, please)

Vocabulary Review: Quizlet http://quizlet.com/_dfq5d Try out Study and Scatter.

Test on chapters 16 & 17, coming up soon.

I'm looking forward to Thursday's lab, where we will focus on chemical change in a very Halloween-ish way! Don't be late!

It All Changes

start here:

And now the homework:

1. Textbook Reading: Chapter 17, section 2: Properties of Matter pages 526-533.
2. Watch this lecture {https://www.youtube.com/watch?v=7zyiW-13jzk 7 minutes, but it will take a lot longer, because you will be COPYING ALL THE WORDS! in your science journals. :) Feel free to add illustrations. This will make it memorable.
3. And lastly, here is a worksheet to fill out:  https://drive.google.com/file/d/0B07s3-bcUr7taE4xSzFYa3QxbFU/view?usp=sharing
4. Actually, let's end with...COOKIES!

I was a little "mixed-up" this morning...but with chromatography I can UNMIX!

Doin' It At Home:  Chromatography:
Here are some alternate directions for doing the experiment at home. You have the option of these  experiments:

1. Candy Chromatography - if you happen to have skittles and M&M's around, or your mom is willing to indulge... http://www.education.com/science-fair/article/chemistry_paper-chromatography/
2. OR>>>Leaf Chromatography - now that we have leaves about to turn color, this is a great experiment - http://chsweb.lr.k12.nj.us/mstanley/materials/chromatoglab.pdf
3. OR-- If you have round coffee filters  http://uncw.edu/chem/courses/reeves/onlinelabs/Paper%20Chromatography/PaperChrom_exp.htm
4. OR--the handout from class, which uses permanent markers and ethanol, but any solvent like rubbing alcohol or nail polish remover will probably work.  Adapt to whatever container you have.
5. OR--most difficult one - Crime Scene Investigation  - but you can do it !  = http://www.msichicago.org/fileadmin/Education/learninglabs/lab_downloads/EvidenceLab_ink_act.pdf
6. NO MATTER WHICH EXPERIMENT  YOU DO, use the handout to tape your strips to and answer those questions, as best applies. Print out whatever experiment you use, staple all together to turn in on Thursday.

And some online reading: (summarize briefly in your journal). 

http://www.propertiesofmatter.si.edu/fbiscience.html

New Chapter - the Classification of Matter

Since we are starting a new chapter, let's do the same in our science journals.
Make a TITLE PAGE in your journal for the next chapter
On we go to Chapter 17: The Classification of Matter
Read Section 1: Composition of Matter, pages 518-524
In your SJ, write up the As You'll Read (What you'll learn & Vocabulary) and also the Reading Check questions. Copy  Figure 7 from page 522, and answer question 7 from page 524.

and here are some videos to reinforce your learning:

and since ketchup is a mixture, here's a word about...

(no notes required)

On Monday, turn in back homework, like the Model the Unseen worksheet and the last lab report (only got 5 of those)

Model, Theory and Method

Great job in class on the demonstrations!  You presented very well, and as an audience you were genuinely supportive and encouraging.  Explanations, if not perfectly complete, gave us something to think about and deepened our understanding of our natural world.  Bravo!

Thursday we will have a few more demos and a review of  "the Story So Far..." before we go on to the next topic, but we will continue using the kinetic model a lot as we study chemistry.  It is foundational.

Homeworks for Tuesday & Wednesday is a general study of science- Models, Theory and Method.

1. Modeling the Unseen, from the World of Chemistry series.

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

>>>>> Modeling the Unseen 

 you will need to click on the VOD button for #4 probably twice    

2.  What is a Scientific Theory?  Take notes in your SJ.

3. The Story of Fred, read & summarize in your SJs, and illustrate if you like (remember, every page in your sjs shoud have an illustration or word-art to highlight the major concepts.)

>>>>Think Like a  Scientist

Pressure's ON! for Monday...

[COPY ABOVE GRAPHIC into your SJ.]

and some explanation for our introduction to Bernoulli's principle, which explains a lot of things, including why really heavy airplanes can fly:  TAKE NOTES IN YOUR SCIENCE JOURNAL.

Here's the list of demonstrations so far:

1. Alek - Fountain bottle
2. Leia - egg magic
3. Laura - magic water glass
4. Niles - Antigravity water
5. Jillian _ Plumber magic
6. Ian - Flying papers

Connor, Abigail, MD, Zach and Ethan - need to choose something else. I have some great suggestions, and I have already sent an email to you(Abigail)  or your moms.  My  email is vqharmon@gmail.com  {DOES ANYONE HAVE A PRESSURE COOKER - I HAVE A GREAT EXPERIMENT TO TRY???!} -ask your mom.

Practice your demos  at least once by yourself and once for a family member.  EXPLAIN, with a diagram like our comic strip for the crushed can, using the Kinetic Particle theory - particles...moving...colliding. - Make a quick poster or use the white board.  It should be something your classmates can copy into their science journals (like the Bernoulli graphic at the top of the page.)

*********

AND A WORD ABOUT CLASS YESTERDAY...

In a class like mine, which is about exploring, some chaos is to be expected, but I would very much appreciate you being attentive to my "class voice"-- and showing me that you are listening, even while you are busy with your hands, by pausing your conversations and looking at me as I add needed explanations to the group.

Also, remember to turn in your homework when it is due. Since I now have a nifty computer program to track such things, I have a list of who is naughty or nice.  MISSED HOMEWORK WILL DIRECTLY AND SUBSTANTIALLY AFFECT YOUR GRADE.  NOT DOING/TURNING IN HOMEWORK IS LIKE GETTING AN "F" or a
*************************************"ZERO"*************************************

Like I've said before, science is a puzzle which gets more interesting as it  becomes more filled in and as more pieces get connected to other pieces.  The topics we've studies so far and the experiments we've done - the phase changes of matter, kinetic theory, Boyle's law/Charles' law/Bernoulli's principle, pressure and temperature, are all very tied together, even if at first they seem random and jumbled.  The puzzle is to put them together into the bigger picture and connect them to the things in your own life that you are interested in, like music or God or flying. Or explosions.

Al Gebra is not a terrorist organization...

math instruction, that is.

Actual weight of my van... more like 5500 lbs., so we were off by a bit.  Can you figure out our mistake?  Leave your hypothesis in the comments section below, and add it to your SJ notes from today.

2. Finish the Foot Pressure lab, answer the questions, turn in on Thursday.

3. Choose a demonstration to present to the class on Monday.  Email me your choice, because the first one to choose a particular demo gets it.  Also let me know if I can help with supplies--although mostly you should use your own household items.  The subject is Air Pressure, and I want you to try able to explain the how and why of your demo to the class, in terms of kinetic particle theory. (All matter is made of particles, in constant random motion, colliding with each other and with the walls of their container.)

Here a site s to check out:  http://www.thehomeschoolmom.com/top-ten-air-pressure-experiments-to-mystify-your-kids-using-stuff-from-around-the-house/

• Or Google "air pressure demonstrations"
• or YouTube it
• Remember to email which demo you choose; first come, first served.

4,  watch this video, in which a physicist explains why the tanker collapsed, and write down that explanation in your journal on the page about the crushed can & cartoon strip. (last Monday's lesson) 

How much pressure is on you?

The homework today is to finish up the What Is Pressure? lab from class, first the data table, and then the questions on the back of the page.  We will share our data on Monday.  Please staple your graph paper and the lab sheet together to turn in.

That's all, and have a lovely hot weekend.