A Moment of Science looks at the many different moons in our solar system.
Did astronauts Jack Lousma and C. Gordon Fullerton see a ghost aboard their shuttle back in 1982? Find out on this Moment of Science.
This means that instead of staying in one place, the cancer cells migrate from their original site to other parts of the body.
In the desert, the absence of water means little or no chemical weathering can take place. Instead, erosion, frost, sedimentation, and the huge temperature fluctuations between day and night break down the rocky surface into sand or gravel.
Since the charcoal filter can’t absorb all chemicals, the last filter uses chemical reactions to clean the air. Say I’m breathing in chlorine-saturated air, like soldiers during World War I.
In most air bags, the sensor triggers chemical reactions that produce nitrogen gas from chemical tablets stored in the unit. The gas whooshes into the bag and inflates it in only a few milliseconds.
Microwaves are low energy electromagnetic waves that have so little energy they can’t trigger chemical reactions in the molecules they encounter.