Set UP: Secure a 3 feet (1m) string between two stationary objects. The string should be taut. Clip paper clips to the string so that they hang freely and can spin around the string. The number of paper clips is up to you. You might try some of the colored paper clips just for fun. […]
NASA’s Vomit Comet
The Ultimate Roller Coaster I had the opportunity to ride in NASA’s KC-135, which is a specially equipped plane used for testing the effect of weightlessness. The effect that it had on my body can be summed up in the nickname given to the plane, which is “THE VOMIT COMET.” Many find a roller coaster […]
Spiders:Communication
I am a scientist that still has a child-like love for make-believe. In fact, I am guilty of telling stories to one of my grandchildren about pet spiders that live only at our farm. This started when a black fuzzy spider dropped down from a light fixture directly in front of Kimberly’s face. She screamed, […]
Density:Ocean Currents
Density is a ratio of mass to volume. Relative density is a comparison of the density of two or more things.For example: What is the relative density of the two balls and water in the diagram? Ball A sinks in the water, thus the density of ball A is greater than the density of water. […]
Sound: Bottle Organ
Blowing across the open mouth of a bottle causes the air inside the bottle to vibrate. The vibrating air produces sound. The pitch of the sound is determined by how fast the air vibrates. As the air inside the bottle decreases it vibrates faster and produces a higher pitched sound. You could write the relationship […]
Thomas Edison
Thomas Alva Edison (1847-1931), was one of the most prolific American inventors of the 19th century. He was born on February 11, 1847, Milan, Ohio; the seventh and last child of Samuel and Nancy Edison. Edison did not learn to talk until he was almost four years of age. His delay in speaking was not […]
Archimedes Water Screw
A screw is an inclined plane wrapped to form a helix (spiral). These are simple machines. The inventor of the first water screw is not known, but it is believed to have been used in ancient Egypt. Archimedes (287?-212 B.C.) is believed to have made improvement on the idea, thus the device is commonly called Archimedes’ Screw; it […]
Spy Pen with Invisible Ink
The spy pen contains ink that is invisible, which means that under ordinary lighting the ink does not reflect visible light to your eyes. Visible light is one of seven different types of light energy (also called electromagnetic energy) and is the only type of light that you can see. Visible light is a band […]
Alexander Graham Bell
Alexander Graham Bell Makes a Human Skull Appear to Scream Alexander Graham Bell (1847-1922) was born in Edinburgh, Scotland. Alexander was the middle son of Alexander Melville Bell and Eliza Grace Symonds. His mother was a portrait painter and accomplished musician. She was hard of hearing, but with the help of an ear tube, which […]
Energy Ball: Science Challenge
The Energy Ball is a fun, easy, and safe way to introduce kids to electric energy. On the outside of the Energy Ball are two metal strips. If you touch these strips with your fingers, the ball will flash a red light and buzz. This happens because something inside the ball produces an electric current […]
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