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I made ScienceFix.com to share my favorite demos that I do in my middle school science classes.  

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Media that I like...
  • Something Funny Happened on the Way to the Moon
    Something Funny Happened on the Way to the Moon
    by Sara Howard
  • NOVA - Origins
    NOVA - Origins
    starring Neil Degrasse Tyson
  • Human Body: Pushing the Limits
    Human Body: Pushing the Limits
    starring Bray Poor
Thursday
Apr292010

Video Demo: Refracting Jelly Marbles

From the Science Outlet, I ordered some Jelly Marbles. I tried them out this past week, and I have to say they are pretty amazing.  Check out the video of what they are and how they can be used in the classroom.  You can also learn more on how to teach refraction, by viewing the laser lens eye demo that I did a couple of months ago.

Wednesday
Apr212010

Video Demo: Conservation of Mass


How the heck do you teach the conservation of mass to 8th grade students?  Lab activities are always good, but what lab activity can be done without the students getting super confused?  Two components are required. First, a chemical reaction is needed.  It must use simple chemicals, and it should be obvious that a chemical reaction took place.  Second, it must be easily quantifiable. In other words the mass is easy to measure and it must show very clearly that mass was not lost during the chemical reaction.  I think I may have finally developed a lab activity that addresses both components.  Watch the video and download the student worksheet for more details.

Thursday
Apr082010

Lesson: M & M Radiometric Dating

Evolution is the change in a species over time. Scientists look at multiple sources for evidence that a species has evolved overtime.  Fossils are one of those sources.  How do scientists no the age of a fossil? They use a technique called radiometric dating to determine the absolute age of a fossil.  You can use M & M"s to simulate how radioactive decay actually works.  Watch the video to see how and download the student handout (word document).

Friday
Apr022010

Video Demo: Diffusion Across a Selectively Permeable Membrane

This is an updated version of a past demo.  Cell membranes are selectively permeable.  That is the membrane allows some materials to pass through and not others.  This allows the cell to maintain homeostasis, a condition in which the cell maintains the proper levels of needed materials.  In this demo the plastic of the bag acts as a selectively permeable membrane.  Iodine is small enough to pass through the plastic, while the larger water molecules are too big.  Watch the video on how to do it and to see what happens.

Wednesday
Mar312010

Video Demo: Food Coloring Diffusion

I bought a new video camera, so I decided to test it out.  Diffusion is a post that I did in the past, but I think the new camera makes it better.