Etiqueta: Sally M Walker

La Electricidad (electricity)

Where does electricity come from? How does it make a computer run or a light bulb shine? Electricity is a

What is matter and where can it be found? Everything in the world is made of matter, whether it is

Why do some things heat up quickly while others dont? How can heat cause matter to change form from solid

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and