In case of fire,turnthe milkbottleupside down over the flames.
Results: When you turn the bottle upside down, the acetic acid and the
sodiumbicarbonatesolutionarebroughtintocontact.They react to produce
carbondioxide, which comes outfrom the glass tube ontothe fire. This ex-
tinguisheris effective, but only for very small fires.
HOW WATER VAPOR BEHAVES INAIR: THE RAIN CYCLE
Thereis acontinuousrain cycle onearth. Todayin NewYorkit may be
clear and sunny,butat the same timetomorrowit may rain. Similarly, a cloudy
or foggy day in Chicagotodaymight be a dry,sparklingdaytomorrow.These
changes come aboutbecause the waterin the atmosphereand on earth is
alwayschangingits state ofmatter,thatis, from solid (ice) to liquid (water) to
gas (water vapor). Itcollects as a liquid in bodies of water onearth.Warmed
by the sun, someofit evaporatesand risesintotheatmosphere,where it cools
and condenses. As the condensedwaterdroplets gathertogether, they form
clouds, and when the clouds get heavy enough, the water droplets spill to
earthas rain, snow, hail orsleet-themain kindsofprecipitation.The bodies
of water onearththenfill up again, and the cyclestartsanew.