Have you ever wondered where metals such as iron, copper or nickle come from? We can buy them from hardware store. But where did the store get them from? Do you need to be an iron ore miner to find them? Turns out a lot of metals can simply be found in soil. Try this simple …
Diffusion is the process of something moving from one place to another in a medium such as air or water. It’s a common process in everyday life. When mom is cooking pancake in the kitchen, you can smell it all the way upstairs in your bedroom. If you put a drop of water color into …
Silkworms Silkworms are native in China. They spin cocoons of fine, strong and lustrous fiber which can be used to produce raw silk. Silkworms are domesticated insects which means they cannot survive in the wild by themselves. The practice of breeding silkworms for silk production has existed for at least 5,000 years in China. …
Friction is the force created when two objects move across each other to oppose the movement. An object gliding on the floor stops because of friction. When friction is reduced, a gliding object moves faster, farther and for longer. This balloon hovercraft can fly across the floor because air has less friction than the floor. When …
