Map and globe study in social studies gives me a unique opportunity to use bubbles to introduce the vocabulary. Placing bubble liquid on the desktop and blowing with a straw produces half of a sphere or a hemisphere. When the bubble pops you can measure the diameter of the circle left behind. Extensions include: How high is your bubble? What is the mean diameter of your first 5 bubbles? Can you compute the circumference of the circle left behind?
When you finish you have CLEAN desks! Enjoy!
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