Innholdsfortegnelse for October 2023 i Ask Science and Arts Magazine for Kids and Children

It was November 1895. Dr. Wilhelm Roentgen, working alone in his laboratory, was doing an experiment, passing electric current through a glass tube from which the air had been pumped out. Scientists had discovered that the device, called a Crookes tube, produced a beam of flowing electrons, a cathode ray, which made the tube glow. To further study cathode rays, Roentgen darkened the room and wrapped the Crookes tube in black cardboard. Then he turned on the electricity. The Mystery Light No light escaped through the cardboard as the current ran through the covered tube. But out of the corner of his eye, Roentgen detected a strange yellowish green glow in the darkness. It came from a sheet of paper on his workbench that had been coated with a fluorescent…

ASK US aNYTHiNG! WRiTe TO uS aT: ASK1 EAST ERIE STREET SUITE 525, PMB4136 CHICAGO, IL 60611 OR HaVe YOUR PaReNT email ASK@CRICKETMMEDIA.COM…

Emergency! Although bones are very strong, a powerful blow can break them. Unfortunately, it looks like that’s what happened when you hit the pavement. But not to worry—bones are amazing masters of self-repair. While a neighbor calls your parents and 911, your broken bone calls for help too. Blood from broken blood vessels inside the bone causes swelling and signals the body’s repair centers. Meanwhile, an ambulance crew rushes you to the hospital emergency room. At the hospital, a technician takes an X-ray photograph of your arm. X-rays are a high-energy form of light that passes right through soft tissue (such as muscles), but not bone. This lets doctors see the break so they know how to treat it. The X-ray shows a simple break, or fracture: your ulna, one…

I am an engraved bone hairpin from near the Falls of the Ohio River. Nearly 6,000 years ago, I held my owner’s long black hair in place, simply and elegantly. I don’t look like the front leg of a deer, but that’s what I’m made of. The straight, dense bone is perfect for hairpins. My maker split the bone into four long pieces. He selected the straightest piece, cut it with a sharp stone knife, then snapped off the joint. He expertly formed my T-shaped top and smoothed my shaft with a small, gritty sandstone rock and a little water. Then, he engraved a beautiful design with a sharp stone. If you could hold me in your hands right now, you would feel how round and smooth I am. You…

Skeletons are not just decorations for Halloween. They give our bodies structure and shape. They protect our organs. They give muscles something to grab onto so we can move around. Some skeletons do all this work hidden away beneath the skin, but other animals wear their skeletons on the outside. Suits of Armor A skeleton on the outside is called an exoskeleton (exo means “out”). The exoskeletons of insects, spiders, crabs, and lobsters are made of a tough, flexible material called chitin. Other animals, such as shellfish and snails, build shells out of calcium. But whatever the material, it’s hard to beat an exoskeleton for protection—the owner’s whole body is tucked safe inside. Exoskeletons also keep the animals inside from drying out. Muscles attach to the inside of an exoskeleton.…