Fourth Grade
Worksheets
A Fingernail in the Sky
On a clear night, I can be seen in the sky. I change shape every day. Sometimes I look like a fingernail sliver. Then I get bigger and bigger. These changes in my appearance are called phases. When I am full, I look like a bright, beaming ball hanging among the stars. My surface is covered with craters. These craters were caused by meteors hitting my surface. Some people have joked that I am made from cheese. That is a silly idea! People from Earth have .....
