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Project: Can We Blow It Pink?
Materials: color-changing cabbage liquid (see first cabbage experiment), drinking straw and glass
Explanatory details: I wanted to see whether blowing into the cabbage liquid would dissolve enough CO2 into it to get a color change to pink. I put maybe 1/3 cup of cabbage liquid into a glass and blew into it with a straw for several breaths, and then Junie did also.
How did it go: We made a lot of bubbles but it stayed purple. We did not get any color change.
Things we talked about: We didn't really talk much about it because I was waiting to see if I could get it to work.
What Junie got out of it: Blowing bubbles is fun!
I may try this one more time with warm cabbage liquid - we used it pretty much straight out of the fridge where I've been storing it, but warming it should promote CO2 going in. I'm also not sure we blew for long enough; I don't really want to do a lot of prolonged blowing at this time (my notes from my previous pregnancy mention a dizzy spell after some nose-blowing right around this time) but maybe getting a couple of people involved and taking turns would do it.
Project: What Else Changes The Color?
Materials: cabbage liquid, vinegar, baking soda, milk, cranberries
Explanatory details: Of course once we had the cabbage juice out we needed to do some more experimenting with it! In addition to vinegar and baking soda solution we tested two new things, some milk and some fresh cranberry juice (I sliced up a few cranberries and mashed them in a little bit of water with a fork).
How did it go: Good! Milk did not cause a color change but the cranberry mash did.
Things we talked about: Cranberries taste sour, and so does lemon juice, and they both turn the cabbage juice pink.
What Junie got out of it: Yay more mixing! Partway through she decided she was making pizza pies, and she definitely lost interest in the whole thing more quickly this time than the first time. I could probably amuse myself indefinitely pH-testing things in my kitchen; Junie is not yet at the point where she thinks things like "what else could I try this with?". Which is kind of useful for keeping mess down; I'll be curious to see at what age she does start doing that kind of brainstorming extension-of-the-concept.
Materials: color-changing cabbage liquid (see first cabbage experiment), drinking straw and glass
Explanatory details: I wanted to see whether blowing into the cabbage liquid would dissolve enough CO2 into it to get a color change to pink. I put maybe 1/3 cup of cabbage liquid into a glass and blew into it with a straw for several breaths, and then Junie did also.
How did it go: We made a lot of bubbles but it stayed purple. We did not get any color change.
Things we talked about: We didn't really talk much about it because I was waiting to see if I could get it to work.
What Junie got out of it: Blowing bubbles is fun!
I may try this one more time with warm cabbage liquid - we used it pretty much straight out of the fridge where I've been storing it, but warming it should promote CO2 going in. I'm also not sure we blew for long enough; I don't really want to do a lot of prolonged blowing at this time (my notes from my previous pregnancy mention a dizzy spell after some nose-blowing right around this time) but maybe getting a couple of people involved and taking turns would do it.
Project: What Else Changes The Color?
Materials: cabbage liquid, vinegar, baking soda, milk, cranberries
Explanatory details: Of course once we had the cabbage juice out we needed to do some more experimenting with it! In addition to vinegar and baking soda solution we tested two new things, some milk and some fresh cranberry juice (I sliced up a few cranberries and mashed them in a little bit of water with a fork).
How did it go: Good! Milk did not cause a color change but the cranberry mash did.
Things we talked about: Cranberries taste sour, and so does lemon juice, and they both turn the cabbage juice pink.
What Junie got out of it: Yay more mixing! Partway through she decided she was making pizza pies, and she definitely lost interest in the whole thing more quickly this time than the first time. I could probably amuse myself indefinitely pH-testing things in my kitchen; Junie is not yet at the point where she thinks things like "what else could I try this with?". Which is kind of useful for keeping mess down; I'll be curious to see at what age she does start doing that kind of brainstorming extension-of-the-concept.
