Why does rain dissolve a sidewalk chalk drawing?

A chalk drawing on a sidewalk will dissolve when it rains. So if you leave a piece of chalk outside in the rain, will the chalk dissolve?

That’s a logical connection, but I think when it rains on a chalk drawing, the water acts to disconnect the chalk from the sidwalk. I’m not sure that the rain dissolves the chalk.

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David
15 years ago

So is it fair to say that if you had a chalk that bonded to cement better, it wouldnt “disolve?”

John
15 years ago

I can confirm that chalk left outside in the rain does not dissolve. It gets a bit porous, swiss-cheesy, but it does not fall apart.

lynne
lynne
12 years ago

hi,ive been asked by a child in school is it right that there is a place in america where all the streets are named after dinasaurs, could some one tell me if that is true and if its true where is it 🙂 thanks for reading this message. Lynne

Tom Saaristo
12 years ago

Actually, your student may be thinking of Dinosaur Colorado. Many of the streets in Dinosaur are named after dinosaurs, but I don’t know if all of them are. Dinosaur is a pretty small town so it could be possible! In Dinosaur you can speed down Stegosaurus Freeway, travel down Triceratops Terrace, drive along Diplodocus Drive, break on the Brachiosaurus Bypass, and peel out on Brontosaurus Boulevard!

Destiny Gittens
Destiny Gittens
10 years ago

I think we need more info about wuestions because people don’t have answers to wuestions they want to no

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