Why Must a Fever Thermometer Be Shaken Each Time It Is Used?
Why Must a Fever Thermometer Be Shaken Each Time It Is Used? A fever thermometer is a special kind of thermometer. It shows whether or not you have a fever when you are...
Read More
How Did Hockey Get Its Name?
Hockey, perhaps the oldest of all games played with a ball and sticks, seems to have got its name from the Old French word “hoquet,” which meant a crook or...
Read More
Why Does a Whale Spout?
Why Does a Whale Spout? Whales spout “fountains” of steam, which are formed by their breath. Whales breathe through blowholes on the top of their heads....
Read More
Do Pine and Fir Trees Lose Their Leaves?
Do Pine and Fir Trees Lose Their Leaves? Many trees shed their leaves in the fall. Their branches are bare by the time winter comes. But some trees, such as pines and...
Read More
What Metals Are Quarters and Dimes Made Of?
What Metals Are Quarters and Dimes Made Of? U.S. quarters and dimes are made of three layers of metal bonded together. The core is copper, and the outer layers are a...
Read More
Why Does Jelly Wobble and Wiggle?
Why Does Jelly Wobble and Wiggle? The gelatin we eat in Jelly typically comes from collagen extracted from the ground bones, hooves, and connective tissues of animals...
Read More
Why Dogs Always Have Wet Noses, and Can Sniff Things out Better than Humans?
Why Dogs Always Have Wet Noses, and Can Sniff Things out Better than Humans? Well, scientists think they’ve found the answer to both those questions. Experts say...
Read More
What Makes a Match Light?
What Makes a Match Light? The tips of ordinary wooden matches are coated with special chemicals that burst into flame at a relatively low temperature. When the tip is...
Read More
How Can a Hummingbird Stand Still in the Air?
How Can a Hummingbird Stand Still in the Air? A hummingbird can stand still, or hover, in the air because its wings move very fast. When hovering, a hummingbird...
Read More
Why Did the Egyptians Make Mummies?
Why Did the Egyptians Make Mummies? The ancient Egyptians believed that there was a life after death. They reasoned that if the body is kept from decaying after death,...
Read More