investigations and experiments

919

Bowl of water on scale
I weighed this bowl of water. If I stick my hand in the water, and weigh it again, will it weigh more? If so, how much more. If not, why not?

940

Magnets
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?

944

Ball on paper plate
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?

Hunting with an Umbrella

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.

Square in the Grass

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.

Contagious Yawns

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.

How Much Rain?

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.

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