by msander | Jul 26, 2017 | Gr. 11-12 Physics
Magnetism seems like a pretty magical phenomenon. Rocks that attract or repel each other at a distance – that’s really cool – and electric current in a wire interacts in the same way. What’s even more amazing is how it works. We normally think...
by msander | Jul 26, 2017 | Gr 1-3 Science & Tech, Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science
Beavers have done more to shape North American landscapes than any animal beside humans. We don’t notice them much today because there aren’t many left, but before colonization, North America was home to hundreds of millions of these furry engineers. This week, we...
by msander | Jul 26, 2017 | Gr 9-10 Science, Gr. 11-12 Biology, Gr. 11-12 Chemistry
Over 100,000 metric tons of caffeine are consumed around the world every year. That’s equivalent to the weight of 14 Eiffel Towers! Caffeine helps us feel alert, focused, and energetic, even if we haven’t had enough sleep — but it can also raise our blood pressure and...
by msander | Jul 26, 2017 | Gr. 11-12 Chemistry, Gr. 11-12 Physics
I have been obsessed with measurement for a long time and I’m not sure quite how it happened. The world’s roundest object played a role in this. I guess I’m just fascinated by how difficult it is to pin down a quantity like a kilogram. A physical...
by msander | Jul 19, 2017 | Gr 9-10 Science, Gr. 11-12 Chemistry
Introduction When two metals having different electrical potentials are placed in a solution of an electrolyte (such as a lemon or an orange, with its high concentration of citric acid), a crude electrochemical cell is set up. The cell is a voltaic cell resulting from...
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