You can use these, made by blowing soap film through a wand, to detect carbon dioxide
To learn about different types of molecules, note that salt will do this in water but flour won't
Wet steel wool in a jar helps demonstrate the formation of this; so does an old car
Use the dye from boiled red cabbage to tell alkalis apart from these, like lemon juice
By putting silver & aluminum together in a solution, you can remove tarnish, caused by this element with the symbol S
Nearly 25 percent of U.S. teens now own one of these phones, so there's no excuse for not calling home
Automaton is sometimes just a fancy name for one of these mechanical beings
When a plane travels faster than the speed of sound, it creates this thunderous noise
An empty Goodyear blimp weighs over 12,000 lbs.; when they fill it with this gas, it weighs only 100 to 200 pounds
The Celsius temperature scale is also called this, meaning "divided into one hundred parts"