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Have you ever played with water balloons? If so, you probably dropped one at some time, and got wet when it burst. What if it had bounced instead? Water balloons can be made to bounce very easily, if you know the science.
If you have ever gone fishing or canoeing in a leaky boat, you know that holes are not a good thing for boats. But under the right circumstances, even a boat full of holes can still float very well.
OK, a puzzle this time. Imagine that you have two steel bars that look alike. One is a magnet and the other is not. Without using anything else (No paperclips, iron filings, etc.) how would you be able to tell which is the magnet?
If I roll the ball around the paper plate in the direction of the blue arrow, when it gets to the place where I cut out part of the plate, which path will it take? A, B or C? Why?
This activity is a result of preparing for another experiment. It began as an experiment with insects, but it was getting too long, so I chopped it in half. (The experiment, not the insect.) This time we will look at the amazing variety of insects that can be found almost everywhere, and in interesting way to collect them.
This activity is one that I use for Schoolyard Ecology workshops. It is a great warm up for getting people to slow down and really look at the world around them. Once they do, they are amazed at all of the things they have been missing, and they never look at a lawn in the same way again.
This experiment is a chance for you to do some scientific research on a problem that has never been solved. We all yawn, and you have probably noticed that if someone else yawns, you do too. Why? There are several hypotheses, but none has enough solid evidence to become an accepted theory.
This week we were in Memphis, to help celebrate my grandmother's 104th birthday. My sister was in from California, and my brother was in town, and it was great fun visiting. I also went to lunch with some wonderful friends from the Memphis Pink Palace Museum. These are some of the folks that taught me how to teach science, and it is always a joy to visit with them.
For this experiment, we will measure some rain, and we will start by making a rain gauge.
In the Sorting Salt and Pepper video we saw that we could mix salt and pepper into a pile and then separate them easily by using the static charge on a balloon. That is one way to separate salt and pepper, but there are many others. How many can you think of? Don't read any more until you have spent some time thinking of as many different ways as you can.
