How Do Pianos Work?

I was wondering how pianos work. 
When you press down a key on the piano, the key is connected to a hammer. It's a different kind of hammer. Not the kind that nails stuff into wood. The hammer on the piano hits a string to make noise.

Click on this link for a video of how pianos work. 

I like to play the piano. I like to play a song called Santa's Sleigh.

Do you have any questions about pianos? Please write them in the comments.

Thank you very much for reading!

How Do Flowers Drink Water?

There were flowers that drank up almost all of the water that was in the vase. That made me think of the question, "how do flowers drink water?"

There's tiny capillaries like little veins in the flower stem. If you look at a leaf you can see the tiny veins and capillaries. They're like tiny tubes that attract the water molecules. The tubes bring the water to the whole flower so the flower can drink.

Here's an experiment you can try with carnations to see how flowers drink water.

I learned this from:

http://www.ehow.com/how-does_4923531_cut-flowers-drink-water.html

Does Trident Gum Really Help Fight Cavities?

Yes.

The dentist told us it has Xylitol in it. Xylitol helps protect our teeth and fight cavities. He said if you chew healthy, like no sugar gum, it sticks to your teeth and gets the food out of your teeth after you eat. So if you can't brush your teeth, you can chew healthy gum like Trident gum.

How Do Rays Sting?

Rays have a spine that stings fish, and some have electricity in their bodies. The stinging spine looks like a sword with teeth. But if the sword was a feather, then the soft parts would be the teeth.


Source: http://answers.askkids.com/Nature/what_does_a_stingray_barb_look_like

Why Is a Canyon Called a Canyon?

We were walking in Rock Canyon and I wanted to know why it's called a canyon.

It's called a canyon because it's a Spanish word that means a tube or pipe.

How Do Mountains Make Coal?

I saw a train carrying coal, and they got it from the mountain. I wanted to know how mountains make coal.

First there's plants that grow. So they die and then they collect in the water. Then dirt and sand buries them. It takes a long time until a mountain gets there. Then it turns into coal.

Coal is very very old. I did not know that coal has ages. It's a billion years old.