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Center of Gravity vs. Center of Mass

By Janice VanCleave

center of gravity

The center of gravity is also called the center of mass.The center of gravity is the point at which an object can be balanced. In the photo, a line has been added to show the center of gravity of the system (chairs + the lady). The center of gravity is also the center of mass […]

Filed Under: Math

Making Möbius Strips

By Janice VanCleave

Each diagram on this page gives instructions for making a special curvy circle that will be used in a magic demonstration. When you have made the three Möbius strips, instructions for using them in a magic of science demonstration can be found  HERE Strip #2Directions for making the magic strips. Notice that for each step […]

Filed Under: Math Tagged With: hypothesis, mobius strips

Lines of Symmetry

By Janice VanCleave

I love making paper designs by cutting piece out of folded paper. If the paper is folded into equal parts, the design formed is a symmetrical figure, such as the paper cut-out shown. The original piece of paper was folded in half twice. The first fold was from top to bottom and the second fold […]

Filed Under: Math Tagged With: symmetry

Symmetrical Figures

By Janice VanCleave

A symmetrical figure is an object that can be divided in half and each half is a mirror image of the other. Your hands are mirror image of each other. This means that they are alike but in reverse. Discover for Yourself Place the palms of your hands together. Note how your fingers perfectly fit […]

Filed Under: Biology, Math

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Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

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