How much IS a kilogram????

So today, we moved from simple grams to an actual kilo-gram.  This is one of my favorite FOSS lessons because it is actually building a kilogram unit using rocks!  The students will work as a team to create 10 bags with 100 grams of rocks in each bag.  I have five science groups, therefore each team is responsible for creating two bags filled with 100 grams of rocks.


As each team filled the bags with rocks, they were able to put gram stackers on the other side of the balance scale to equal 100 grams.  The kids really enjoyed this because they had to be precise in their measurements.

Next, we put all ten bags together into one gallon sized bag. I also had a kilogram weight that we passed around so that the kids could feel the weight of a kg vs. the weight of a gram.

It was a good connection to count each bag by 100's until we had all 10 bags which equaled 1,000.   I think having this visual model is important because mass is one of those units that can be hard to visualize - you can't see it like linear or even capacity; you have to feel it.






Popular posts from this blog

A Novel History of Psychology

Image
BOOK REVIEW: Vanessa L. Ryan, Thinking Without Thinking in the Victorian Novel (Baltimore: Johns Hopkins University Press, 2012) ——————————————— Science and (the study of) literature are growing closer together. From  Stanford's Literary Lab  and a recent New York Times piece on the Digital Humanities  to reading Austen in an MRI machine  and so-called " Literary Darwinism ," there's both controversy and a certain cache (and maybe even a little cash) in bringing scientific techniques and the study of literature closer together. This is your brain on Austen ( http://news.stanford.edu/news/2012/september/images/mri_reading_news.jpg ) So what about the study of science and the study of literature? History of science, say, and literary history? The short answer is that it's happening in English departments, but not so much in History. Why? More on that below. Work on the interplay between science and literature has been dominated by scholars of the Victorian novel. G...
Read more

The Strength of American Materials -- An Environmental History of Engineering Science

Image
From the Franklin Institute's General Report on the Explosions of Steam-Boilers     One of the many pleasures of writing "Tocqueville's Ghost" for HSNS ( discussed on AmericanScience here ) was revisiting Ann Johnson's  “Material Experiments: Environment and Engineering Institutions in the Early American Republic,” from Osiris  in 2009. It's a fascinating essay and makes a convincing case for rethinking the sort of science and engineering going on at West Point and in the Corps of Engineers in the early nineteenth century. Johnson shows how the West Point/Corps project adapted the French Polytechnique model in research as well as teaching, creating in the process a very productive "research school." She shows how prominent men of science like Alexander Dallas Bache carried on later celebrated work (most prominently his steam-boiler experiments, above) that owed much to their time working with Joseph Totten and the Corps of Engineers at Fort Adams. ...
Read more

PLUTOPALOOZA! The Secret Science Club presents Astrophysicist Neil deGrasse Tyson on Wednesday, March 18 at 8 pm @ the Bell House, $3 cover charge

Image
photo by David Gamble COUNTDOWN TO RE-LAUNCH . . . Hold on to your wigs and keys, science scenesters! Union Hall and the Secret Science Club have been overwhelmed by audience demand---so it is now official: The Secret Science Club is moving from Union Hall to Brooklyn’s big new Bell House ! PLUS, the Secret Science Club is debuting its first-ever "theme song," written and performed by the Dead River Company . Check it out LIVE before the Neil deGrasse Tyson lecture. Special Event! Astrophysicist Neil deGrasse Tyson blasts off from the Bell House with a lecture on the "Rise and Fall of America's Favorite Planet," $3 cover The icy little world known as Pluto is billions of miles from Earth. Yet, when the International Astronomical Union demoted Pluto to the status of dwarf planet in 2006, the reaction was out of this world. Defiant T-shirt slogans, and pity-filled songs all raged against Pluto’s sad fate. Hell hath no fury like a planet (and its fans) scorned. ...
Read more