Slow Connection High Speed Flash High Speed Quicktime
Today's Photo
Make a Compass
Magnetic Fields
How can you see a color that you can't see?
Video: The Color You Can't See - FREE -
Why do you see that stuff that looks like water on the road, but it disappears before you get there?
Video: Mirage
What is the speed of light? Well, that depends....
Video: Changing the Speed of Light
Candy that lights up in your mouth.
Experiment: Light from a Lifesaver Candy - FREE -
What color is the light from a fluorescent light bulb?
Experiment: Fluorescent Blues (and Yellows) - FREE -
These are short, science oriented videos that don't fit neatly into other categories. Many are just for fun, as I learn more about the world of video.
CHEMISTRY
Why is it important that scientist measure mass and not weight
can you make more of your
can you make more of your videos free?
Because weight is only
Because weight is only relevant to gravity, mass stays the same.
Weight changes as the gravity
Weight changes as the gravity on different planets changes, but mass will always be the same
Gravity
Weight is mass with the pull of Gravity - E. G. Weight on Eart compared to Weight on Moon Q.E.D
Mass versus weight
Mass versus weight is an extremely difficult concept to teach to fourth grade students. Your presentation made it very easy to understand and apply. Thank you for making complex topics fun and manageable for the average science learner. It is also very helpful to the educator!! Thanks again!
Why does scientist measure
Why does scientist measure mass and not weight?
that is kool!!!!!
that is kool!!!!!
Fantastic! Thank you for all
Fantastic! Thank you for all the effort that you go to in producing these free videos.
wow
this is one of ur best videos!!! u rock :)
Units of Mass vs. Weight
Nice video, but I think there are a couple of problems. I think it would be better to use force units for weight and mass units for mass. That is, newtons for weight and kilograms for mass. Also, I imagine that the balance you showed actually measures mass and not weight. I think it would be better to compare a spring scale (force measuring device) with a two-pan balance (which clearly shows a comparison of one mass with another).
Good point. I considered
Good point. I considered using newtons, but these videos are mostly targeted towards elementary and middle school students, and their curriculum does not address newtons. The scale is in the video actually a spring scale, not a balance, but like many scales, it is calibrated in grams and kilograms, not newtons. Explaining why the scales was calibrated to the wrong units would have meant going off on a tangent to the main point.
I hear what you're saying
I understand the desire to stay on track, and overall I like what you've done. In the high school physics and chemistry classes I teach, though, I hammer the kids on units and dimensional analysis. It's possibly the most generally useful skill I've learned in science.
I have some spring scales that are calibrated in grams and they drive me nuts every time I use them. I inherited them, or I would not be using them. "When *I* buy my spring scales, they will be calibrated in the correct units!," he said forcefully.
Thanks for the free video. All the best to you.
Post new comment