Why Do Mosquito Bites Itch?
Why Do Mosquito Bites Itch? The itchy welt that forms after a mosquito bite is caused by saliva that the mosquito injects into the skin. When a mosquito bites, it pokes...
Read More
How Does an Elephant Use Its Trunk?
How Does an Elephant Use Its Trunk? An elephant’s trunk is its nose, its hand and its hose. The trunk is about six feet long, it contains 100,000 different muscles...
Read More
How Is Cartilage Different than Bone?
How Is Cartilage Different than Bone? Your nose and your ears allow you to sense things, but there’s something else inside them that they share. The stuff under...
Read More
Why Do Plants Have Sap?
Why Do Plants Have Sap? Sap is the liquid that enables trees and other plants to live and grow. The roots of a plant draw water, along with dissolved minerals, from the...
Read More
Why Is Popcorn the Only Kind of Corn That Pops?
Why Is Popcorn the Only Kind of Corn That Pops? While popcorn is growing in the field, it looks much like any other kind of corn. But kernels of popcorn are extra hard...
Read More
How Is Glass Made?
Ordinary glass is made from clean, white sand and two white, powdery chemicals known as soda and lime. Just plain sand can be made into glass, but it must be heated to...
Read More
How Does an Escalator Work?
How Does an Escalator Work? An escalator is an endless chain of moving steps pulled round and round by a strong electric motor. An escalator is really just like a...
Read More
What Are Black and Blue Marks?
What Are Black and Blue Marks? Black-and-blue marks indicate bleeding under the skin. When we receive a sharp blow, tiny blood vessels break inside the skin. Blood from...
Read More
How Are Soft Drinks Made?
How Are Soft Drinks Made? Soft drinks start out as plain, cooled water. At the soft drink bottling plant, a pump like machine called a carbonator charges (combines) the...
Read More
How Will You Define Condiments?
How Will You Define Condiments? Condiments can be defined as things that are added to give prepared food more flavors. They usually take the form of sauces, dips, or...
Read More