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I like your idea of using empty plastic soda bottles with tops cut off - yet another way to save money. And I also like the extension to have students calculate water density.
1 L plastic soda bottles with the tops cut off also work for water containers. Remember to get lots of paper towels for this activity. Density is very fickle - I told my students to try to calculate the density of water from this.
I do not have a large sink - I have some large semi-clear containers I use. Like you, I worry about losing 35mm canisters soon due to digital cameras.
Great reminder of pop rockets - double use.
That sounds like a great hands-on activity. I also get my film canisters from WalMart but I wonder how many more years before they are no longer made due to digital cameras.
Glen, do you have a large sink to do this activity? I think one would ne...
I've found there is NOT a magic formula. It seems to be a challenge to try to get "neutral density." Students LOVED the challenge and were more engaged than on other activities/labs I expected they would enjoy more.
great! is there a magic formula?
As we finish up the school year, I decided to give my 7th grade students a challenge. We've learned about density and how to calculate it. We also have taken time to experiment with how various densities allow some objects to float more easily tha...
Comment Wall (2 comments)
- At 6:47am on September 6, 2009,
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- At 4:39pm on August 21, 2008,
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- Glen,
Welcome to Middle School Science Teacher.
Kevin
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- What grade do you teach?
- 7th, 8th, 9th
Glen Westbroek's Blog
Inquiry Density Challenge
As we finish up the school year, I decided to give my 7th grade students a challenge. We've learned about density and how to calculate it. We also have taken time to experiment with how various densities allow some objects to float more easily than others. One activity we did was determining which liquids were densest and layering five liquids in order (densest at the bottom to least dense at the top.)
Today's challenge involved an empty 35mm film canister for each student. I had large plastic… Continue
Today's challenge involved an empty 35mm film canister for each student. I had large plastic… Continue
Posted on May 27, 2009 at 6:30pm — 6 Comments
Densities of liquids
We have been learning about density recently in my middle school science classroom. Most previous work was done using mass and volume to calculate density. This activity was designed to help students identify how density differences in liquids can be used to sort the liquids. Teacher preparation was kept to a minimum. Five different liquid solutions were prepared. Each solution contained corn syrup and water. The solutions were each made in separate 800 ml beakers. The least dense solution had a… Continue
Posted on February 6, 2009 at 7:18pm — 2 Comments
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