Terry Stice, Age 10, Of Huntsville. Ala... For her question:

How does the earth tilt on its axis?

The earth's orbit is like a rim. Around a p1ate.as thaearth travels around its orbit, it also spins around its axis  which is a line straight through the center of the globe frcm pole to pole. When two lines meet, they form a corner called an angle. If the earth's axis were straight up, it would form a right angle with its orbit. But it is not a right angle is a square corner. If its sides are equal, it fits exactly into a quarter of a circle. A whole circle is divided into 360 degrees; a half circle is 180 degrees. A right angle spans 90 degrees of a circle. The earth's axis is tilted to form an angle of 23.5 degrees with its orbit  which is less than a third of a right angle.