A Moment of Science
Planning on climbing Mount Everest? You might want to plan to be gasping for air. Learn more on this Moment of Science.
How does a straw work? And would a straw work in space?
You've watched astronauts complete dangerous missions on space walks. Couldn't they use suction cups and suction themselves to the ship?
Why must bakers adjust their cake ingredients when they live at higher elevations?
How does dry ice perform this disappearing act? Why is dry ice dry?
Some very adventurous people have used big suction cups to climb the fronts of glass buildings. However, they’d better not climb too high, because the higher you go, the less effective a suction cup will be. In space they’re no good at all! Learn more on this Moment of Science.
Impress your friends with a cool candle trick: learn how to blow on a candle flame and make it come toward you rather than lean away or even go out.
All you need for this trick is a twenty-five-cent piece and a small postage stamp. Put the stamp on the desk and hold the quarter horizontally about half an inch above the stamp. Now blow hard down onto the quarter.Now blow hard down onto the quarter.
The same thing happens to the air in the car. When the car stops the air keeps moving forward. This results in more air, or higher air pressure, in the front of the passenger compartment.
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