2007-04-14 07:48:57 · 6 answers · asked by jelly bean 2 in Science & Mathematics ➔ Other - Science
Raisens are dried grapes. They absorb water for the same reason that a dry sponge does.
2007-04-15 10:57:10 · answer #1 · answered by Thomas C 6 · 0⤊ 1⤋
Because they are a dried fruit. They absorb water by osmosis and keep taking on more water as the dry constituents inside, mostly sugars, go into solution. The sugars do not diffuse out because they are too big to go out through the cell walls. Water moves in bulk from areas of diluteness to areas of higher solute concentration so the raisins swell up. It's like they are trying to turn into grapes again.
2007-04-14 14:56:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Raisins are dehydrated grapes. If you introduce water to them, it will be absorbed due to the lack of water inside the raisin...water flows from an area of high water concentration to an area of low water concentration until each side has an equal concentration of water molecules
2007-04-14 14:53:33 · answer #3 · answered by Brandon W 5 · 0⤊ 0⤋
Because they're so thirsty from sitting in the sun all day.
Besides, they used to be big, fat, round grapes that had all their fluid dried out, so it's a natural reaction for them to absorb fluid to get back to their naturaly state
That's possibly one of the least scientific answers I could have given you, but the general concept is there at least
2007-04-14 14:52:56 · answer #4 · answered by Brandon B 2 · 0⤊ 0⤋
They are thirsty from being dried in the sun. They use to be grapes until some bastard dried them out. So they are soaking water up into the vains.
2007-04-14 14:53:13 · answer #5 · answered by burkscw 3 · 0⤊ 0⤋
Because they are dried out. All they really are is dried out grapes.
2007-04-14 21:05:34 · answer #6 · answered by Glo 6 · 0⤊ 0⤋