Thursday, October 31, 2013

Mighty Mousetraps

Thank you for your kind words and prayers for my husband who is in the hospital today and for the next day or two.  He is getting better.  I hope you had great fun at the Harvest party, and in celebration, just a wee bit of homework to prepare for science next week.  Do a Google-image search to find pictures of cool mousetrap cars which you might emulate when we start building them in the next few weeks.  Copy and paste them onto a document and print it out--try to find 4 good pictures of different models.
Also, begin collecting parts for wheels; old CDs or toy wheels or a large vinyl record, plastic lids or ???  Whatever you have, share the extra, and experiment.  >>>If you have balsa wood or other lightweight wood or other items to experiment with, bring it in too. 

Here are a couple of youtube videos of mousetrap cars in action:


And of course there are lots of youtube videos of what others have built and raced.  If you find a great one, share in the comments below.




Monday, October 28, 2013

In Honor of Danny C...who has just been skydiving...

Just because it's cool...and interesting...and even educational...








But for homework, tidy up your experiments  from class, making sure your final explanation is as clear as possible, and your tables and graphs are correctly done.  Next time we do another TOPS experiment, let's follow the procedure of gluing the experiment card to the upper portion of the lab book page, and neatly recording data in tables and graphs plus answering the questions at the end.  PLEASE ALWAYS BRING YOUR LAB BOOKS TO CLASS---ALWAYS!

TUESDAY - Study for the test by reviewing
 vocabulary, re-reading the blog posts and re-watching the videos, re-read the textbook chapter 2, sections 1-3, and answering the end-of-chapter assessment.

WEDNESDAY - After a very brief review (10 minutes to look over the chapter and notes) put away your books and open the test handed out in class.  Have your mom sign it after it is completed to attest that you did not look up answers in your textbook.  Thanks!  TURN IN ON THURSDAY!

Thursday, October 24, 2013

Need a Push?

Thanks for a great class--I'm sure you'll enjoy these videos:



Take notes: Remembering begins with a pencil.

Take notes: Remembering begins with a pencil.

Take notes: Remembering begins with a pencil.

Take notes: Remembering begins with a pencil.

Finally, READ your TEXTBOOK-- chapter 3, section 3 -- + study questions ---There will be a test next Thursday on this chapter. (woo-hoo! I love tests!)




Tuesday, October 22, 2013

Accelerated Learning3



Textbook Reading: Chapter 2, section 2 - Acceleration + end of section questions
worksheet: Speed-Time Graphs
Finish math worksheet started in class

Thank you for your kind attention in class, and for tracking with me through the math.  I hope you enjoyed the puzzle of the pendulum - and finding patterns in the natural world.  Square numbers are not just for math books; they are hidden in nature, along with many other treasures of wisdom and knowledge.

"By wisdom the LORD laid the earth's foundations, by understanding he set the heavens in place; by His knowledge the deeps were divided ...."  Proverbs  3



Friday, October 18, 2013

Moving On --Meaning Motion

First thing first, add a description to you lab notebook of our final one-second pendulum group experiment.  -- We did a bunch of 10-second trials, each person adjusting the length of their pendulum to make it run faster or slower, until we found the spot where it swung with a one-second period, that length turned out to be  25 cm, or so?  And then we quickly experimented to find a two-second pendulum, which was about 100 cm.  Can anyone make a guess as to how long would be a 3-second pendulum?  Leave a comment below.



For homework, read Chapter 2, section 1 in your textbook.
In your lab books, make a page for Energy and Motion Vocabulary, and find the meaning of these words as you read: [along with definitions, draw a little picture to illustrate the concepts]
  • distance
  • displacement
  • speed
  • average speed
  • instantaneous speed
  • velocity
  • what is the difference between distance and displacement
  • what is the difference between speed and velocity
  • what is the mathematical formula for finding speed?

And if you don't mind hyper-corny...


Monday, October 14, 2013

The Question Is Hanging...

...like a pendulum bob in the air, back and forth, back and forth.  Is is the mass of the bob? Is it the length of the string?  We are left to wonder...

But for now, no homework, except to write up your lab very simply, one sentence descriptions:
Purpose: To build a one-second pendulum
Question: What makes the period of the pendulum move faster or slower?
Hypothesis:
Data Table:
Conclusion: Does the data support or disprove your hypothesis?
Now what is your new hypothesis?

This was a great experiment for showing the value of controls- those things that stay the same, and the single variable which you change.  Even though we have not finished...

And I'll See You On Wednesday afternoon, at the Exploratorium!!! ...where we will spend some quality time...with More Pendulums!!!  You may bring your pocket-size cameras; it is a great way to take pictures AND notes!  Also, I will give tickets for Store!  Maybe a treasure hunt!


Wow!

Thursday, October 10, 2013

What can you do with a piece of string and a bob?

...besides fishing??

But first, do the assessment questions 1-5 below the gizmos Density Lab, and also questions 1-3 on the gizmo page, Archimedes Principle  (it's right below the gizmo; scroll down.)  Check your answers by clicking "check your answers" at the bottom of the page.  Print out to turn in.  call me if you don't understand.  892-8540
How much water do those 3-men-in-a-tub actually displace?


Now on to the next subject. Homework is to make a pendulum, any size you want, and observe, observe, observe.  Write down your observations and the questions that come to mind as you ponder.  I expect you to spend 45 minutes and write about 2 pages of notes(legibly) .
A pendulum is simply a weight hanging from a string attached to a fixed point, like the edge of a table, and which is free to swing back and forth.

Write down:
What do you see, and what mystifies you...
What questions, what hypotheses, what possible experiments, what variables and what control...
What use is there, you will probably ask...

What deep truths to be unlocked???

No research in books or net, just hands and eyes, body and brain.  You may also use measuring tools, like a tape measure or meter stick, and remember time can be measured too. An ipod or itouch or smarty-pants phone, even a watch with a second hand or stopwatch will work.  Experiment=Experience.

Please bring those ipad/itouch/smartphone or stopwatches on Monday to class.

Extra Fun : If you have a little brother and sister, take them to the park, and swing.  Especially if they are named Bob. Think about it.
Vector of a Cartoon Summer Boy on a Rope Swing - Outlined Coloring Page
Now reread the directions to make sure you have done all I asked.

Monday, October 7, 2013

Homework for Thursday.

Start by remembering Monday's lab and putting your lab notebook in order.  Describe the goal (make an object that will float with the most number of dimes inside) and summarize what you learned.  Write up your results.  Describe your most successful boat design. Think about how you might "quantify" your boat designs.  >>"...it was 2 cm tall, the flat bottom was rectangular, and covered 18 square cm...etc." for example.  In retrospect, what kind of measurements should you have taken?

Gizmos: follow log on directions from previous blog.  Print out the student exploration and the vocabulary page.  Follow the directions for Archimedes' Principle: 
(skip activity C).
http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=603&ClassID=2407757+




AND/OR: Do another hands-on experiment, this time using aluminum foil and pennies in your sink.
Print out and follow the directions.

And yes, you may do both>>>I recommend it!







Thursday, October 3, 2013

Just Catchin' Up...

Nice work on the demonstrations; they were much enjoyed by the littler kids and the parents.  Best way to learn is to help someone else learn.

No homework if you have managed to finish the Gizmo from Monday.  If not, get a parent or helpful sibling, follow the instructions on last blog.  I really like the gizmo simulations and I would like to continue using them.   Could you leave a comment if you are not able to do it (with your name)?