As summer has started to wind down, we've been overwhelmed with a list of things that have to be done before school starts- haircuts, doctor appointments, trips to the zoo- and haven't had a solid week to do another Science Camp. But we've managed to fit in a few experiments here and there.
The first of the two I'll show you here was super simple and the kids really liked it. The second was, um, well, you'll see.
Today's experiments both come from this book. A-Train has had this book for a couple of years and occasionally gets a little obsessed with it. Now that he's old enough to read and actually help out with the experiments, rather than watch me do them, it's become a lot of fun to get ideas from the book.
Here's what you need for our first experiment. We actually ended up using a second can of Sprite, but I don't think that's absolutely necessary.
First, have your minion pour the clear carbonated drink (I'm guessing seltzer or tonic would work as well as soda) into a tall clear glass. Then put in a few raisins.
If, like me, you are working with a heavy-handed preschooler, you may end up with a few more than a few raisins in your glass.
And then you watch! I used my phone to make a video of what we were watching, but for the life of me can't get it to upload to this blog, so you'll have to make do with a few pictures. Just scroll through them really fast and it will seem like video!
The science here is that the raisins sink to the bottom of the glass where the bubbles of carbonation attach to the them and they begin to rise. At the top of the glass, the bubbles burst and the raisins sink and the whole process starts again.
This was pretty mesmerizing to A-Train and me. Big D was all done watching after about 12 seconds. After 10 minutes or so we put the glass aside, but when I checked back an hour later they were still rising and falling. And when I checked back about six hours after that, it was still happening. By the time we got up the next morning, all the raisins were still- no more free rides!
Experiment #2 was not nearly as successful. But, in case you want to try it for yourselves and prove me wrong, here's what you need:
That's a couple of balloons, some sharpies and a sweater.
The first step is blowing up the balloons. If you've got little kids, you know the amount of spit that one kid can get inside a balloon before he hands it to you so you can tie it for him. If you don't have little kids, let the idea of a handful of someone else's spit serve as birth control for you.
Next, decorate the balloons with the Sharpies. (This part is optional, but if your experiment turns out like ours did, it may be the highlight of the whole affair.) Big D and I drew faces on ours.
Great picture of me, huh?
A-Train drew a Yeti.
I know, I didn't think so either, but that's what he said it was.
Next, have an unwitting assistant don a hand-me-down sweater.
Then, commence rubbing your decorated balloons on the sweater for one minute.
Now, according to
The Big Book of Science Things to Make and Do, you can put your balloon against the wall and it will be held in place by the
magic scientific powers of static electricity!
Because it's hard to hold a balloon up to a wall and take a picture of yourself doing it at the same time, I only got pictures of what happened when I let go of the balloons.
Yeah, that's my floor.
We tried again, but instead of rubbing the balloons on the sweater, we went with A-Train's idea.
I don't even want to talk about the tangles that had to be combed out after 180 seconds of rubbing latex orbs on The Boy's head.
And there's the result. On the floor again.
This experiment was a dud!
Now, I'm no sciencetitian, but if I had to guess, I'd say this experiment didn't work in August in the South because it's so darn humid. If memory serves, dry weather makes for better static cling.
Now you'll excuse my while I go wash A-Train's hair with Downy.
