I can see part of my nose, the part that sticks out from my face. The holes in my nose are called nostrils. Hairs grow in my nostrils. The hairs help keep dust out of my nose. But I can't see all of...
The cloud in space
When Rick's uncle came for his usual Sunday visit, Rick was waiting for him at the door. Uncle Frank was a scientist---an astronomer---and Rick had an important question to ask him. "Uncle Frank,...
A “star” with a tail
> Night after night, a long, shining streak hung in the sky. It looked > like a big, bright star with a glowing tail. Each night it seemed to > grow bigger and brighter. People were terrified. "It's...
How the sun was born
Most scientists think our sun began as an immense cloud of gas and dust. Stars that are growing old often shoot out enormous clouds of gas and dust. The gas and dust are made up of all kinds of...
Dust devils and dust storms
A tornado is a whirling wind that comes down from the sky and touches the ground. Dust devils and sand pillars are whirling winds that go from the ground up into the sky. Whenever hot air rises, it...
How was the earth born?
Why is the earth shaped like a ball? Why isn't it shaped like a block? Or why isn't it round and flat, like a pie? Why does it spin? And why does it whirl around and around the sun? Most scientists...