Scientists use a scale called the pH scale to measure how acidic or basic something is. The scale runs from 0 to 14. Where 0 is the most acidic and 14 is the most basic. Around the middle we have ...

Is it an acid, base, or neutral? Make your own acid-base indicator from red cabbage, then test various household substances. Acids and bases are classes of materials that have different properties.

Don't you mean pink cabbage? No, I mean blue cabbage. Wait, now it's pink again! As you can see, your little angel might just discover that this stuff is cool enough to eat! 1. Red cabbage contains a ...