#706 Why do we sneeze?
Why do we sneeze? We usually sneeze in order to remove an irritant from the nose. There are many different things that make people sneeze, but the most common cause…
Why do we sneeze? We usually sneeze in order to remove an irritant from the nose. There are many different things that make people sneeze, but the most common cause…
Why do many Americans drink coffee and many British people drink tea? Because Americans boycotted tea before, during, and after the War of Independence and because the British government gained…
Why does iron rust? The iron atoms react with oxygen molecules to produce iron oxide, which is rust. Other metals don’t rust because only iron, or metals with an iron…
Is a starfish a fish? No, starfish are not fish. Fish are vertebrate animals that live in the sea, have gills to breathe through, have a two chambered heart, are…
Why is mercury poisonous? It can damage the nervous system, kidneys, liver, and immune systems of people and animals. Mercury is a heavy metal. Heavy metals are metals that are…
Do all liquids expand when they freeze? No. Water is the only liquid that expands when it freezes. There are four states of matter: solid, liquid, gas, and plasma. As…
How does a helicopter with two rotors work? The rotors rotate in opposite directions and are on a transmission so that they don’t collide with each other There are over…
Why does a boomerang come back? One wing travels faster than the other which causes it to fly in a circular path. However, not all boomerangs are designed to come…
What is a nerve? They are bundles of nerve fibers called axons that connect neurons. They look like cables. Their job is to transmit electrical impulses. All animals have nerves.…